/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:58:47,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:58:47,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:58:48,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 20:58:48,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:58:48,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:58:48,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:58:48,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:58:48,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:58:48,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:58:48,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:58:48,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:58:48,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:58:48,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:58:48,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:58:48,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:48,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:58:48,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:58:48,075 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:58:48,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:58:48,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:58:48,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:58:48,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:58:48,293 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:58:48,293 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:58:48,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-20 20:58:48,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bab7078/d14773a4024e417abcfb3237e18375bc/FLAG69bb24920 [2022-03-20 20:58:48,735 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:58:48,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-20 20:58:48,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bab7078/d14773a4024e417abcfb3237e18375bc/FLAG69bb24920 [2022-03-20 20:58:48,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63bab7078/d14773a4024e417abcfb3237e18375bc [2022-03-20 20:58:48,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:58:48,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:58:48,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:48,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:58:48,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:58:48,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596e673d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48, skipping insertion in model container [2022-03-20 20:58:48,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:58:48,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:58:48,924 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/egcd3-ll_unwindbound50.c[490,503] [2022-03-20 20:58:48,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:48,948 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:58:48,957 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/egcd3-ll_unwindbound50.c[490,503] [2022-03-20 20:58:48,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:58:48,974 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:58:48,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48 WrapperNode [2022-03-20 20:58:48,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:58:48,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:58:48,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:58:48,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:58:48,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:48,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:49,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:49,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:49,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:58:49,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:58:49,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:58:49,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:58:49,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (1/1) ... [2022-03-20 20:58:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:58:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:49,048 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 20:58:49,061 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 20:58:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:58:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:58:49,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:58:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:58:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:58:49,094 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:58:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:58:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:58:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:58:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:58:49,173 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:58:49,175 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:58:49,295 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:58:49,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:58:49,300 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 20:58:49,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:49 BoogieIcfgContainer [2022-03-20 20:58:49,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:58:49,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:58:49,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:58:49,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:58:49,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:58:48" (1/3) ... [2022-03-20 20:58:49,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2446a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:49, skipping insertion in model container [2022-03-20 20:58:49,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:58:48" (2/3) ... [2022-03-20 20:58:49,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2446a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:58:49, skipping insertion in model container [2022-03-20 20:58:49,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:58:49" (3/3) ... [2022-03-20 20:58:49,308 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2022-03-20 20:58:49,317 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:58:49,318 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:58:49,360 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:58:49,375 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 20:58:49,375 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:58:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 20:58:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 20:58:49,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:49,421 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 20:58:49,422 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-20 20:58:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1069677738] [2022-03-20 20:58:49,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:49,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-03-20 20:58:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:49,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923965484] [2022-03-20 20:58:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:58:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:49,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:58:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 20:58:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:58:49,595 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 20:58:49,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:49,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923965484] [2022-03-20 20:58:49,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923965484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:49,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1069677738] [2022-03-20 20:58:49,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1069677738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:58:49,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883231062] [2022-03-20 20:58:49,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:49,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:58:49,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:58:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:58:49,630 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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 20:58:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:49,712 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-20 20:58:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:58:49,714 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 20:58:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:49,720 INFO L225 Difference]: With dead ends: 74 [2022-03-20 20:58:49,720 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 20:58:49,723 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 20:58:49,726 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:49,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 20:58:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 20:58:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 20:58:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 20:58:49,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 20:58:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:49,762 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 20:58:49,762 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 20:58:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 20:58:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 20:58:49,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:49,764 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 20:58:49,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:58:49,764 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-20 20:58:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73204461] [2022-03-20 20:58:49,769 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:49,769 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-03-20 20:58:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:49,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569967786] [2022-03-20 20:58:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:49,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:49,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:49,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201404416] [2022-03-20 20:58:49,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:49,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:49,793 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 20:58:49,794 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 20:58:49,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:58:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:58:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:49,968 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 20:58:49,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:49,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569967786] [2022-03-20 20:58:49,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:49,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201404416] [2022-03-20 20:58:49,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201404416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 20:58:49,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73204461] [2022-03-20 20:58:49,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73204461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:49,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 20:58:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882837439] [2022-03-20 20:58:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:49,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 20:58:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 20:58:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 20:58:49,973 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:49,990 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-20 20:58:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 20:58:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 20:58:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:49,992 INFO L225 Difference]: With dead ends: 44 [2022-03-20 20:58:49,992 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 20:58:49,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 20:58:49,994 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:49,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 20:58:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 20:58:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 20:58:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 20:58:50,046 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 20:58:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:50,048 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 20:58:50,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 20:58:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 20:58:50,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:50,049 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, 1] [2022-03-20 20:58:50,078 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 20:58:50,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:50,264 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-20 20:58:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [782766832] [2022-03-20 20:58:50,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-03-20 20:58:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972863703] [2022-03-20 20:58:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:50,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470612320] [2022-03-20 20:58:50,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:50,284 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 20:58:50,286 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 20:58:50,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:58:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:58:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:50,541 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 20:58:50,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:50,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972863703] [2022-03-20 20:58:50,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470612320] [2022-03-20 20:58:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470612320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:50,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:50,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:50,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [782766832] [2022-03-20 20:58:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [782766832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:50,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:50,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922235866] [2022-03-20 20:58:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:50,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:50,544 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 20:58:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:50,639 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-20 20:58:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 24 [2022-03-20 20:58:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:50,642 INFO L225 Difference]: With dead ends: 57 [2022-03-20 20:58:50,642 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 20:58:50,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:58:50,644 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:50,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 20:58:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 20:58:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-03-20 20:58:50,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-03-20 20:58:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:50,670 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-03-20 20:58:50,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 20:58:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-03-20 20:58:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 20:58:50,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:50,673 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, 1] [2022-03-20 20:58:50,699 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 20:58:50,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 20:58:50,896 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:50,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-20 20:58:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002921419] [2022-03-20 20:58:50,898 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-03-20 20:58:50,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362971558] [2022-03-20 20:58:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:50,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:50,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530407237] [2022-03-20 20:58:50,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:50,919 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 20:58:50,920 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 20:58:50,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:50,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,045 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 20:58:51,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:51,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:51,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362971558] [2022-03-20 20:58:51,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:51,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530407237] [2022-03-20 20:58:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530407237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:51,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:51,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002921419] [2022-03-20 20:58:51,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002921419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:51,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248371242] [2022-03-20 20:58:51,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:51,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:51,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:51,056 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:51,093 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-03-20 20:58:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-20 20:58:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:51,097 INFO L225 Difference]: With dead ends: 77 [2022-03-20 20:58:51,097 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 20:58:51,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:51,106 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:51,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 20:58:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 20:58:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-20 20:58:51,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-20 20:58:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:51,118 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-20 20:58:51,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-20 20:58:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 20:58:51,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:51,119 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, 1, 1] [2022-03-20 20:58:51,152 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 20:58:51,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,332 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-20 20:58:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644245970] [2022-03-20 20:58:51,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-03-20 20:58:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:51,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725547497] [2022-03-20 20:58:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:51,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:51,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502456824] [2022-03-20 20:58:51,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:51,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:51,351 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 20:58:51,381 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 20:58:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:51,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725547497] [2022-03-20 20:58:51,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502456824] [2022-03-20 20:58:51,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502456824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:51,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:51,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 20:58:51,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:51,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644245970] [2022-03-20 20:58:51,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644245970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:51,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:51,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:51,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955698235] [2022-03-20 20:58:51,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:51,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:58:51,610 INFO L87 Difference]: Start difference. First operand 55 states and 72 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:51,652 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-03-20 20:58:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:58:51,653 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-03-20 20:58:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:51,656 INFO L225 Difference]: With dead ends: 67 [2022-03-20 20:58:51,657 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 20:58:51,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:51,658 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:51,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 20:58:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 20:58:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:58:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-03-20 20:58:51,678 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-03-20 20:58:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:51,678 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-03-20 20:58:51,678 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-03-20 20:58:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 20:58:51,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:51,680 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:51,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 20:58:51,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,895 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-20 20:58:51,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [634528803] [2022-03-20 20:58:51,897 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-03-20 20:58:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:51,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982955686] [2022-03-20 20:58:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:51,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001170398] [2022-03-20 20:58:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:51,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:51,931 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 20:58:51,944 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 20:58:51,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:51,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:52,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982955686] [2022-03-20 20:58:52,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001170398] [2022-03-20 20:58:52,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001170398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:52,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:52,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:58:52,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:52,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [634528803] [2022-03-20 20:58:52,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [634528803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:52,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:52,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:52,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418740783] [2022-03-20 20:58:52,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:52,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:52,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:52,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:52,150 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 20:58:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:52,355 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-03-20 20:58:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:58:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 31 [2022-03-20 20:58:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:52,357 INFO L225 Difference]: With dead ends: 138 [2022-03-20 20:58:52,357 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 20:58:52,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:52,358 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:52,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 353 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 20:58:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-03-20 20:58:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:58:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-03-20 20:58:52,390 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-03-20 20:58:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:52,390 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-03-20 20:58:52,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 20:58:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-03-20 20:58:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 20:58:52,392 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:52,392 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:52,412 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 20:58:52,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:52,599 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-03-20 20:58:52,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884606143] [2022-03-20 20:58:52,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-03-20 20:58:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:52,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434145510] [2022-03-20 20:58:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:52,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:52,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:52,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48104216] [2022-03-20 20:58:52,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:52,619 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 20:58:52,621 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 20:58:52,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:58:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:52,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434145510] [2022-03-20 20:58:52,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48104216] [2022-03-20 20:58:52,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48104216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:52,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:52,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:52,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884606143] [2022-03-20 20:58:52,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884606143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:52,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:52,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 20:58:52,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743141074] [2022-03-20 20:58:52,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:52,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 20:58:52,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 20:58:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:52,755 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:52,787 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-03-20 20:58:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:52,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-20 20:58:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:52,789 INFO L225 Difference]: With dead ends: 127 [2022-03-20 20:58:52,789 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 20:58:52,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:58:52,791 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:52,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 20:58:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 20:58:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 20:58:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-03-20 20:58:52,816 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-03-20 20:58:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:52,816 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-03-20 20:58:52,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-03-20 20:58:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 20:58:52,819 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:52,819 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:52,846 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 20:58:53,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:53,044 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-03-20 20:58:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339735460] [2022-03-20 20:58:53,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-03-20 20:58:53,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476124434] [2022-03-20 20:58:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:53,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:53,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805106784] [2022-03-20 20:58:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:53,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:53,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:53,063 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 20:58:53,076 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 20:58:53,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 20:58:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:53,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476124434] [2022-03-20 20:58:53,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805106784] [2022-03-20 20:58:53,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805106784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:53,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 20:58:53,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339735460] [2022-03-20 20:58:53,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339735460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:53,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:53,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:58:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634396667] [2022-03-20 20:58:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:53,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:58:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:58:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:58:53,329 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:53,387 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-03-20 20:58:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:58:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 20:58:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:53,388 INFO L225 Difference]: With dead ends: 163 [2022-03-20 20:58:53,388 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 20:58:53,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:53,389 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:53,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 20:58:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 20:58:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 20:58:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-03-20 20:58:53,402 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-03-20 20:58:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:53,403 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-03-20 20:58:53,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-03-20 20:58:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 20:58:53,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:53,404 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:53,429 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 20:58:53,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:53,627 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-20 20:58:53,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555403106] [2022-03-20 20:58:53,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-03-20 20:58:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:53,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293608802] [2022-03-20 20:58:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:53,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:53,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380755610] [2022-03-20 20:58:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:53,644 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 20:58:53,646 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 20:58:53,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 20:58:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 20:58:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293608802] [2022-03-20 20:58:54,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380755610] [2022-03-20 20:58:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380755610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:54,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:54,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 20:58:54,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555403106] [2022-03-20 20:58:54,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555403106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:54,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:54,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886472045] [2022-03-20 20:58:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:54,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:58:54,026 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 20:58:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:54,146 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-03-20 20:58:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:58:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 36 [2022-03-20 20:58:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:54,148 INFO L225 Difference]: With dead ends: 154 [2022-03-20 20:58:54,148 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 20:58:54,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:54,149 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:54,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 375 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 20:58:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-20 20:58:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:58:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-03-20 20:58:54,187 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-03-20 20:58:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:54,187 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-03-20 20:58:54,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 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 20:58:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-03-20 20:58:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 20:58:54,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:54,188 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-03-20 20:58:54,208 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 20:58:54,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 20:58:54,398 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-03-20 20:58:54,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127270916] [2022-03-20 20:58:54,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-03-20 20:58:54,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988996599] [2022-03-20 20:58:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:54,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:54,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168218729] [2022-03-20 20:58:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:58:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:54,411 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 20:58:54,417 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 20:58:54,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:58:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 20:58:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:54,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:54,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:54,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988996599] [2022-03-20 20:58:54,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:54,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168218729] [2022-03-20 20:58:54,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168218729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:54,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:54,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:54,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:54,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127270916] [2022-03-20 20:58:54,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127270916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:54,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:54,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686292153] [2022-03-20 20:58:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:54,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:54,527 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 20:58:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:54,608 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-03-20 20:58:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:58:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 37 [2022-03-20 20:58:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:54,611 INFO L225 Difference]: With dead ends: 300 [2022-03-20 20:58:54,611 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 20:58:54,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 20:58:54,612 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:54,612 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 20:58:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-03-20 20:58:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 20:58:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-03-20 20:58:54,634 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-03-20 20:58:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:54,634 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-03-20 20:58:54,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 20:58:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-03-20 20:58:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 20:58:54,635 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:54,635 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, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:54,664 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 20:58:54,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:58:54,859 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-20 20:58:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:54,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2083690762] [2022-03-20 20:58:54,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-03-20 20:58:54,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:54,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292049933] [2022-03-20 20:58:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:54,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767440720] [2022-03-20 20:58:54,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:54,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:54,872 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 20:58:54,895 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 20:58:54,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 20:58:55,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:55,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:55,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292049933] [2022-03-20 20:58:55,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:55,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767440720] [2022-03-20 20:58:55,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767440720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:55,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:55,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:55,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:55,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2083690762] [2022-03-20 20:58:55,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2083690762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:55,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:55,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:58:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554981767] [2022-03-20 20:58:55,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:55,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:58:55,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:55,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:58:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:58:55,067 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:55,188 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-03-20 20:58:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:58:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 20:58:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:55,190 INFO L225 Difference]: With dead ends: 193 [2022-03-20 20:58:55,190 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 20:58:55,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:58:55,191 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:55,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 20:58:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-20 20:58:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 20:58:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-03-20 20:58:55,211 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-03-20 20:58:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:55,212 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-03-20 20:58:55,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 20:58:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-03-20 20:58:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 20:58:55,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:55,213 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:55,238 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 20:58:55,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 20:58:55,427 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-20 20:58:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943482194] [2022-03-20 20:58:55,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-03-20 20:58:55,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:55,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781042639] [2022-03-20 20:58:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:55,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:55,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:55,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35094906] [2022-03-20 20:58:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:55,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:55,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:55,440 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 20:58:55,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 20:58:55,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 20:58:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:55,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781042639] [2022-03-20 20:58:56,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35094906] [2022-03-20 20:58:56,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35094906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:56,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:56,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-20 20:58:56,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943482194] [2022-03-20 20:58:56,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943482194] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:56,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:56,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:58:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642127390] [2022-03-20 20:58:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:56,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:58:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:58:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:56,011 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 20:58:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:56,211 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-03-20 20:58:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 20:58:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-20 20:58:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:56,213 INFO L225 Difference]: With dead ends: 199 [2022-03-20 20:58:56,213 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 20:58:56,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:58:56,214 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:56,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 20:58:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-20 20:58:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 20:58:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-03-20 20:58:56,237 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-03-20 20:58:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:56,238 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-03-20 20:58:56,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 20:58:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-03-20 20:58:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 20:58:56,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:56,239 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, 1, 1, 1, 1, 1] [2022-03-20 20:58:56,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 20:58:56,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 20:58:56,457 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-20 20:58:56,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76797363] [2022-03-20 20:58:56,458 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-03-20 20:58:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:56,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740601960] [2022-03-20 20:58:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:56,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:56,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233325197] [2022-03-20 20:58:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:56,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:56,484 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 20:58:56,485 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 20:58:56,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:56,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:56,627 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 20:58:56,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740601960] [2022-03-20 20:58:56,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233325197] [2022-03-20 20:58:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233325197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:56,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:56,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:56,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76797363] [2022-03-20 20:58:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76797363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:56,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:56,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736572837] [2022-03-20 20:58:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:56,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:56,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:56,630 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 20:58:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:56,691 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-03-20 20:58:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-03-20 20:58:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:56,694 INFO L225 Difference]: With dead ends: 261 [2022-03-20 20:58:56,695 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 20:58:56,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 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 20:58:56,696 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:56,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 20:58:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-03-20 20:58:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 20:58:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-03-20 20:58:56,726 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-03-20 20:58:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:56,727 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-03-20 20:58:56,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 20:58:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-03-20 20:58:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 20:58:56,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:56,728 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:56,755 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 20:58:56,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 20:58:56,944 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-03-20 20:58:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:56,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958909775] [2022-03-20 20:58:56,945 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-03-20 20:58:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:56,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707613282] [2022-03-20 20:58:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:56,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288489623] [2022-03-20 20:58:56,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:56,956 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 20:58:56,957 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 20:58:57,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:57,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:57,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 20:58:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707613282] [2022-03-20 20:58:57,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288489623] [2022-03-20 20:58:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288489623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:57,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:57,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 20:58:57,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958909775] [2022-03-20 20:58:57,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958909775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:57,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391256073] [2022-03-20 20:58:57,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:57,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:57,266 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:57,362 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-03-20 20:58:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:58:57,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-20 20:58:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:57,368 INFO L225 Difference]: With dead ends: 429 [2022-03-20 20:58:57,369 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 20:58:57,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:57,370 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:57,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 20:58:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-03-20 20:58:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 20:58:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-03-20 20:58:57,404 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-03-20 20:58:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:57,404 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-03-20 20:58:57,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 20:58:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-03-20 20:58:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 20:58:57,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:57,405 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:57,431 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 20:58:57,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 20:58:57,628 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-03-20 20:58:57,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [145438847] [2022-03-20 20:58:57,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-03-20 20:58:57,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:57,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128342494] [2022-03-20 20:58:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:57,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:57,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720852332] [2022-03-20 20:58:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:57,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:57,646 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 20:58:57,647 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 20:58:57,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:58:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 20:58:57,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:58:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:57,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128342494] [2022-03-20 20:58:57,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:57,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720852332] [2022-03-20 20:58:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720852332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:57,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:57,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [145438847] [2022-03-20 20:58:57,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [145438847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:57,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:57,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:58:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465063981] [2022-03-20 20:58:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:57,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:58:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:58:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:58:57,772 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 20:58:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:57,829 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-03-20 20:58:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:58:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 46 [2022-03-20 20:58:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:57,832 INFO L225 Difference]: With dead ends: 332 [2022-03-20 20:58:57,832 INFO L226 Difference]: Without dead ends: 330 [2022-03-20 20:58:57,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 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 20:58:57,835 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:57,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:58:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-20 20:58:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-03-20 20:58:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 20:58:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-03-20 20:58:57,874 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-03-20 20:58:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:57,874 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-03-20 20:58:57,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 20:58:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-03-20 20:58:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 20:58:57,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:57,875 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:57,901 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 20:58:58,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:58,091 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-03-20 20:58:58,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100864660] [2022-03-20 20:58:58,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-03-20 20:58:58,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197784626] [2022-03-20 20:58:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:58,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:58,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:58,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595539924] [2022-03-20 20:58:58,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:58,111 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 20:58:58,113 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 20:58:58,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:58:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:58,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:58:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:58:58,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:58:58,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197784626] [2022-03-20 20:58:58,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:58:58,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595539924] [2022-03-20 20:58:58,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595539924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:58:58,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:58:58,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 20:58:58,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:58:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100864660] [2022-03-20 20:58:58,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100864660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:58:58,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:58:58,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:58:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698967504] [2022-03-20 20:58:58,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:58:58,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:58:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:58:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 20:58:58,458 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:58:58,564 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-03-20 20:58:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 20:58:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-03-20 20:58:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:58:58,567 INFO L225 Difference]: With dead ends: 335 [2022-03-20 20:58:58,568 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 20:58:58,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:58:58,568 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:58:58,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:58:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 20:58:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-03-20 20:58:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 20:58:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-03-20 20:58:58,610 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-03-20 20:58:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:58:58,610 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-03-20 20:58:58,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:58:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-03-20 20:58:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 20:58:58,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:58:58,611 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:58:58,637 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 20:58:58,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 20:58:58,835 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:58:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:58:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-20 20:58:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:58:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336044138] [2022-03-20 20:58:58,836 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:58:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-03-20 20:58:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:58:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832357744] [2022-03-20 20:58:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:58:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:58:58,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:58:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186203255] [2022-03-20 20:58:58,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:58:58,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:58:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:58:58,849 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 20:58:58,850 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 20:58:58,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:58:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:58:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 20:58:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:58:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:58:59,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 20:59:00,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832357744] [2022-03-20 20:59:00,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:00,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186203255] [2022-03-20 20:59:00,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186203255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:00,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:00,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 20:59:00,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:00,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336044138] [2022-03-20 20:59:00,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336044138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:00,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:00,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:00,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899662750] [2022-03-20 20:59:00,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:00,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:59:00,432 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:00,889 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-03-20 20:59:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-03-20 20:59:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:00,894 INFO L225 Difference]: With dead ends: 384 [2022-03-20 20:59:00,894 INFO L226 Difference]: Without dead ends: 381 [2022-03-20 20:59:00,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:59:00,895 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:00,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 474 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-20 20:59:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-20 20:59:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 20:59:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-03-20 20:59:00,944 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-03-20 20:59:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:00,945 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-03-20 20:59:00,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-03-20 20:59:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 20:59:00,945 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:00,946 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:00,972 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 20:59:01,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 20:59:01,159 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-03-20 20:59:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712151592] [2022-03-20 20:59:01,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-03-20 20:59:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618506483] [2022-03-20 20:59:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:01,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027858914] [2022-03-20 20:59:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:01,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:01,174 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 20:59:01,176 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 20:59:01,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:59:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:01,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618506483] [2022-03-20 20:59:01,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027858914] [2022-03-20 20:59:01,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027858914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:01,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:01,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 20:59:01,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:01,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712151592] [2022-03-20 20:59:01,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712151592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:01,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:01,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:59:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681819075] [2022-03-20 20:59:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:01,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:59:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:59:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:59:01,531 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:01,656 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-03-20 20:59:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-20 20:59:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:01,660 INFO L225 Difference]: With dead ends: 604 [2022-03-20 20:59:01,660 INFO L226 Difference]: Without dead ends: 440 [2022-03-20 20:59:01,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:59:01,661 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:01,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-20 20:59:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-03-20 20:59:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-20 20:59:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-03-20 20:59:01,728 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-03-20 20:59:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:01,728 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-03-20 20:59:01,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-03-20 20:59:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 20:59:01,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:01,730 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:01,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 20:59:01,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 20:59:01,954 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-03-20 20:59:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:01,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157718937] [2022-03-20 20:59:01,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-03-20 20:59:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:01,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220194742] [2022-03-20 20:59:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:01,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946392958] [2022-03-20 20:59:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:01,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:01,972 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 20:59:01,973 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 20:59:02,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:59:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:02,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:02,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220194742] [2022-03-20 20:59:02,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:02,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946392958] [2022-03-20 20:59:02,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946392958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:02,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:02,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 20:59:02,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:02,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157718937] [2022-03-20 20:59:02,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157718937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:02,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:02,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:59:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983203552] [2022-03-20 20:59:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:02,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:59:02,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:02,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:59:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:59:02,348 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:02,508 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-03-20 20:59:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:59:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-03-20 20:59:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:02,511 INFO L225 Difference]: With dead ends: 531 [2022-03-20 20:59:02,511 INFO L226 Difference]: Without dead ends: 524 [2022-03-20 20:59:02,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=274, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:02,513 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:02,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 240 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-20 20:59:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-03-20 20:59:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:59:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-03-20 20:59:02,567 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-03-20 20:59:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:02,568 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-03-20 20:59:02,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-03-20 20:59:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 20:59:02,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:02,569 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:02,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:02,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:02,787 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-20 20:59:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:02,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459871496] [2022-03-20 20:59:02,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-03-20 20:59:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:02,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014485475] [2022-03-20 20:59:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:02,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457255242] [2022-03-20 20:59:02,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:02,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:02,801 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 20:59:02,801 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 20:59:02,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 20:59:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 20:59:03,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 20:59:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014485475] [2022-03-20 20:59:03,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457255242] [2022-03-20 20:59:03,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457255242] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:03,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:03,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 20:59:03,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:03,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459871496] [2022-03-20 20:59:03,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459871496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:03,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:03,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362803437] [2022-03-20 20:59:03,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:03,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:03,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:03,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:03,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:59:03,185 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:03,270 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-03-20 20:59:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:59:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 20:59:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:03,272 INFO L225 Difference]: With dead ends: 517 [2022-03-20 20:59:03,273 INFO L226 Difference]: Without dead ends: 515 [2022-03-20 20:59:03,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:59:03,273 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:03,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-20 20:59:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-20 20:59:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:59:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-03-20 20:59:03,330 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-03-20 20:59:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:03,330 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-03-20 20:59:03,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-03-20 20:59:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 20:59:03,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:03,332 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:03,355 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 20:59:03,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:03,547 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-03-20 20:59:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:03,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643884910] [2022-03-20 20:59:03,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-03-20 20:59:03,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131569047] [2022-03-20 20:59:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:03,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394534895] [2022-03-20 20:59:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:03,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:03,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:03,558 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 20:59:03,559 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 20:59:03,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 20:59:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:03,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:03,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131569047] [2022-03-20 20:59:03,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394534895] [2022-03-20 20:59:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394534895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:03,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:03,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 20:59:03,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1643884910] [2022-03-20 20:59:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1643884910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:03,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:03,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:59:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351821492] [2022-03-20 20:59:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:03,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:59:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:59:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:59:03,807 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:04,242 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-03-20 20:59:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-20 20:59:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:04,247 INFO L225 Difference]: With dead ends: 857 [2022-03-20 20:59:04,247 INFO L226 Difference]: Without dead ends: 850 [2022-03-20 20:59:04,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:59:04,248 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:04,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 572 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:04,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-20 20:59:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-03-20 20:59:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-20 20:59:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-03-20 20:59:04,323 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-03-20 20:59:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:04,323 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-03-20 20:59:04,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-03-20 20:59:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 20:59:04,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:04,324 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:04,350 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 20:59:04,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 20:59:04,539 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-03-20 20:59:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145209119] [2022-03-20 20:59:04,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-03-20 20:59:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823988717] [2022-03-20 20:59:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:04,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334604517] [2022-03-20 20:59:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:04,556 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 20:59:04,558 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 20:59:04,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:59:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:04,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:04,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823988717] [2022-03-20 20:59:04,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:04,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334604517] [2022-03-20 20:59:04,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334604517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:04,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:04,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 20:59:04,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:04,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145209119] [2022-03-20 20:59:04,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145209119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:04,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:04,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:59:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004356965] [2022-03-20 20:59:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:04,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:59:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:59:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:59:04,909 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:05,067 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-03-20 20:59:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-20 20:59:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:05,075 INFO L225 Difference]: With dead ends: 839 [2022-03-20 20:59:05,075 INFO L226 Difference]: Without dead ends: 567 [2022-03-20 20:59:05,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-20 20:59:05,079 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:05,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-20 20:59:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-03-20 20:59:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-20 20:59:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-03-20 20:59:05,146 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-03-20 20:59:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:05,147 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-03-20 20:59:05,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-03-20 20:59:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:59:05,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:05,148 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:05,171 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 20:59:05,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 20:59:05,363 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-03-20 20:59:05,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:05,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023331812] [2022-03-20 20:59:05,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:05,364 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-03-20 20:59:05,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:05,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483304386] [2022-03-20 20:59:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:05,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:05,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:05,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181520789] [2022-03-20 20:59:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:05,374 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 20:59:05,375 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 20:59:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 20:59:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 20:59:05,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:59:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:05,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483304386] [2022-03-20 20:59:05,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:05,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181520789] [2022-03-20 20:59:05,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181520789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:05,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:05,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:05,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023331812] [2022-03-20 20:59:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023331812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:05,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:05,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:59:05,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119459554] [2022-03-20 20:59:05,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:05,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:59:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:59:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:59:05,534 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:05,673 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-03-20 20:59:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:59:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-20 20:59:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:05,677 INFO L225 Difference]: With dead ends: 980 [2022-03-20 20:59:05,677 INFO L226 Difference]: Without dead ends: 624 [2022-03-20 20:59:05,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:59:05,678 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:05,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:59:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-20 20:59:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-03-20 20:59:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:59:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-03-20 20:59:05,761 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-03-20 20:59:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:05,761 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-03-20 20:59:05,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-03-20 20:59:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 20:59:05,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:05,762 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:05,786 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 20:59:05,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:05,975 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-03-20 20:59:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243214562] [2022-03-20 20:59:05,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-03-20 20:59:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:05,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635035462] [2022-03-20 20:59:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:05,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558177242] [2022-03-20 20:59:05,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:05,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:05,986 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 20:59:05,987 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 20:59:06,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:59:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:06,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635035462] [2022-03-20 20:59:06,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558177242] [2022-03-20 20:59:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558177242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:06,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 20:59:06,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243214562] [2022-03-20 20:59:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243214562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:06,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 20:59:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557996387] [2022-03-20 20:59:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:06,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 20:59:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 20:59:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:59:06,319 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:06,517 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-03-20 20:59:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 20:59:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-03-20 20:59:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:06,521 INFO L225 Difference]: With dead ends: 914 [2022-03-20 20:59:06,521 INFO L226 Difference]: Without dead ends: 584 [2022-03-20 20:59:06,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:06,523 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:06,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-20 20:59:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-03-20 20:59:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 20:59:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-03-20 20:59:06,597 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-03-20 20:59:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:06,597 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-03-20 20:59:06,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-03-20 20:59:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 20:59:06,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:06,598 INFO L499 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:06,625 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 20:59:06,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:06,819 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-03-20 20:59:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156303162] [2022-03-20 20:59:06,820 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-03-20 20:59:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:06,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095365440] [2022-03-20 20:59:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:06,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227395684] [2022-03-20 20:59:06,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:06,829 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 20:59:06,830 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 20:59:06,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:59:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:07,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:07,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:07,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095365440] [2022-03-20 20:59:07,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:07,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227395684] [2022-03-20 20:59:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227395684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:07,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:07,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 20:59:07,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156303162] [2022-03-20 20:59:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156303162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:07,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:07,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:59:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473247450] [2022-03-20 20:59:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:07,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:59:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:59:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:59:07,232 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:07,456 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-03-20 20:59:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:59:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-03-20 20:59:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:07,459 INFO L225 Difference]: With dead ends: 918 [2022-03-20 20:59:07,459 INFO L226 Difference]: Without dead ends: 688 [2022-03-20 20:59:07,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:59:07,461 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 124 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:07,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 278 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-20 20:59:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-03-20 20:59:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-20 20:59:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-03-20 20:59:07,543 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-03-20 20:59:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:07,543 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-03-20 20:59:07,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-03-20 20:59:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 20:59:07,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:07,544 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:07,569 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 20:59:07,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 20:59:07,767 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-03-20 20:59:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041495630] [2022-03-20 20:59:07,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-03-20 20:59:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389957314] [2022-03-20 20:59:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:07,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:07,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001864113] [2022-03-20 20:59:07,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:07,779 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 20:59:07,780 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 20:59:07,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 20:59:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 20:59:07,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 20:59:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389957314] [2022-03-20 20:59:08,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001864113] [2022-03-20 20:59:08,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001864113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:08,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:08,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 20:59:08,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041495630] [2022-03-20 20:59:08,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041495630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:08,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:08,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:59:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749730585] [2022-03-20 20:59:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:08,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:59:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:59:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:59:08,078 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:08,313 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-03-20 20:59:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:59:08,313 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-03-20 20:59:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:08,317 INFO L225 Difference]: With dead ends: 757 [2022-03-20 20:59:08,317 INFO L226 Difference]: Without dead ends: 755 [2022-03-20 20:59:08,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 20:59:08,318 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:08,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-20 20:59:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-03-20 20:59:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-20 20:59:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-03-20 20:59:08,439 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-03-20 20:59:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:08,439 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-03-20 20:59:08,439 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 20:59:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-03-20 20:59:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 20:59:08,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:08,441 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:08,469 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 20:59:08,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 20:59:08,655 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-03-20 20:59:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766850156] [2022-03-20 20:59:08,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-03-20 20:59:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404494375] [2022-03-20 20:59:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:08,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49095435] [2022-03-20 20:59:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:08,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:08,668 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 20:59:08,670 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 20:59:08,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:08,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:59:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 20:59:09,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 20:59:09,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404494375] [2022-03-20 20:59:09,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49095435] [2022-03-20 20:59:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49095435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:09,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-20 20:59:09,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766850156] [2022-03-20 20:59:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766850156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:09,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:59:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429949162] [2022-03-20 20:59:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:09,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:59:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:59:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:09,916 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 20:59:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:10,394 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-03-20 20:59:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:59:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-03-20 20:59:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:10,398 INFO L225 Difference]: With dead ends: 840 [2022-03-20 20:59:10,398 INFO L226 Difference]: Without dead ends: 838 [2022-03-20 20:59:10,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:59:10,399 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:10,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 588 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-20 20:59:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-03-20 20:59:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-20 20:59:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-03-20 20:59:10,527 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-03-20 20:59:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:10,527 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-03-20 20:59:10,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 20:59:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-03-20 20:59:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 20:59:10,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:10,528 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:10,553 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 20:59:10,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 20:59:10,751 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-03-20 20:59:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:10,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578770451] [2022-03-20 20:59:10,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-03-20 20:59:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:10,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309079181] [2022-03-20 20:59:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:10,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:10,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:10,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090715959] [2022-03-20 20:59:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:10,764 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 20:59:10,765 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 20:59:10,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:10,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:59:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:10,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 20:59:11,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309079181] [2022-03-20 20:59:11,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090715959] [2022-03-20 20:59:11,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090715959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:11,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:11,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:59:11,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578770451] [2022-03-20 20:59:11,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578770451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:11,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:11,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116923718] [2022-03-20 20:59:11,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:11,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:11,163 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:11,444 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-03-20 20:59:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-03-20 20:59:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:11,448 INFO L225 Difference]: With dead ends: 1433 [2022-03-20 20:59:11,448 INFO L226 Difference]: Without dead ends: 975 [2022-03-20 20:59:11,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:11,451 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 145 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:11,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 307 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-20 20:59:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-03-20 20:59:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-20 20:59:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-03-20 20:59:11,570 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-03-20 20:59:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:11,570 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-03-20 20:59:11,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 20:59:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-03-20 20:59:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 20:59:11,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:11,571 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:11,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 20:59:11,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 20:59:11,794 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-03-20 20:59:11,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:11,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801920953] [2022-03-20 20:59:11,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-03-20 20:59:11,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:11,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700847758] [2022-03-20 20:59:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:11,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:11,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356424196] [2022-03-20 20:59:11,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:11,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:11,804 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 20:59:11,807 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 20:59:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 20:59:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 20:59:12,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 20:59:16,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:16,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700847758] [2022-03-20 20:59:16,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:16,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356424196] [2022-03-20 20:59:16,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356424196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:16,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:16,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 20:59:16,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801920953] [2022-03-20 20:59:16,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801920953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:16,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:16,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396801699] [2022-03-20 20:59:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:16,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:16,072 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:59:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:17,009 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-03-20 20:59:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 20:59:17,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-03-20 20:59:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:17,014 INFO L225 Difference]: With dead ends: 1025 [2022-03-20 20:59:17,014 INFO L226 Difference]: Without dead ends: 1022 [2022-03-20 20:59:17,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-20 20:59:17,015 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:17,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 553 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-20 20:59:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-03-20 20:59:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-20 20:59:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-03-20 20:59:17,129 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-03-20 20:59:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:17,130 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-03-20 20:59:17,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 20:59:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-03-20 20:59:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 20:59:17,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:17,131 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:17,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:17,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 20:59:17,346 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-03-20 20:59:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732376454] [2022-03-20 20:59:17,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:17,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-03-20 20:59:17,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:17,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629408069] [2022-03-20 20:59:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:17,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:17,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484194703] [2022-03-20 20:59:17,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:17,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:17,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:17,354 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 20:59:17,355 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 20:59:17,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 20:59:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:17,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:17,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629408069] [2022-03-20 20:59:17,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484194703] [2022-03-20 20:59:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484194703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:17,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:17,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 20:59:17,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732376454] [2022-03-20 20:59:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732376454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:17,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 20:59:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240854798] [2022-03-20 20:59:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:17,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 20:59:17,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 20:59:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 20:59:17,798 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:18,019 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-03-20 20:59:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 20:59:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-03-20 20:59:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:18,023 INFO L225 Difference]: With dead ends: 966 [2022-03-20 20:59:18,023 INFO L226 Difference]: Without dead ends: 959 [2022-03-20 20:59:18,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=354, Unknown=0, NotChecked=0, Total=600 [2022-03-20 20:59:18,024 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 125 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:18,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 280 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-20 20:59:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-03-20 20:59:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-20 20:59:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-03-20 20:59:18,137 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-03-20 20:59:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:18,137 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-03-20 20:59:18,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-03-20 20:59:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 20:59:18,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:18,139 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:18,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 20:59:18,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:18,345 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-03-20 20:59:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429744906] [2022-03-20 20:59:18,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-03-20 20:59:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080143336] [2022-03-20 20:59:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:18,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899036878] [2022-03-20 20:59:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:18,354 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 20:59:18,355 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 20:59:18,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 20:59:18,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 20:59:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 20:59:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080143336] [2022-03-20 20:59:21,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899036878] [2022-03-20 20:59:21,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899036878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:21,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 20:59:21,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:21,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429744906] [2022-03-20 20:59:21,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429744906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:21,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:59:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783706587] [2022-03-20 20:59:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:21,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:59:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:59:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:59:21,994 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:22,843 INFO L93 Difference]: Finished difference Result 1073 states and 1433 transitions. [2022-03-20 20:59:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:59:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-03-20 20:59:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:22,848 INFO L225 Difference]: With dead ends: 1073 [2022-03-20 20:59:22,848 INFO L226 Difference]: Without dead ends: 1070 [2022-03-20 20:59:22,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:22,849 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 91 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:22,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 20:59:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-20 20:59:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1027. [2022-03-20 20:59:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 723 states have (on average 1.2738589211618256) internal successors, (921), 734 states have internal predecessors, (921), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1375 transitions. [2022-03-20 20:59:22,980 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1375 transitions. Word has length 88 [2022-03-20 20:59:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:22,980 INFO L478 AbstractCegarLoop]: Abstraction has 1027 states and 1375 transitions. [2022-03-20 20:59:22,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1375 transitions. [2022-03-20 20:59:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 20:59:22,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:22,981 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:22,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 20:59:23,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 20:59:23,182 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-03-20 20:59:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362480953] [2022-03-20 20:59:23,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-03-20 20:59:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529084912] [2022-03-20 20:59:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:23,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:23,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368718369] [2022-03-20 20:59:23,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:23,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:23,196 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 20:59:23,197 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 20:59:23,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:23,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:59:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:23,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:23,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529084912] [2022-03-20 20:59:23,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368718369] [2022-03-20 20:59:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368718369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:23,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:23,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:59:23,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:23,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362480953] [2022-03-20 20:59:23,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362480953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:23,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:23,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:23,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566690848] [2022-03-20 20:59:23,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:23,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:23,642 INFO L87 Difference]: Start difference. First operand 1027 states and 1375 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:23,909 INFO L93 Difference]: Finished difference Result 1062 states and 1410 transitions. [2022-03-20 20:59:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-03-20 20:59:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:23,914 INFO L225 Difference]: With dead ends: 1062 [2022-03-20 20:59:23,914 INFO L226 Difference]: Without dead ends: 1055 [2022-03-20 20:59:23,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:23,915 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:23,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 293 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-20 20:59:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1038. [2022-03-20 20:59:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 734 states have (on average 1.2697547683923707) internal successors, (932), 745 states have internal predecessors, (932), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1386 transitions. [2022-03-20 20:59:24,104 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1386 transitions. Word has length 91 [2022-03-20 20:59:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:24,105 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1386 transitions. [2022-03-20 20:59:24,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1386 transitions. [2022-03-20 20:59:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 20:59:24,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:24,106 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:24,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 20:59:24,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:24,306 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-03-20 20:59:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:24,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638769982] [2022-03-20 20:59:24,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-03-20 20:59:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056960842] [2022-03-20 20:59:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:24,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:24,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:24,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904538852] [2022-03-20 20:59:24,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:24,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:24,318 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 20:59:24,319 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 20:59:24,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:24,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 20:59:24,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:24,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:24,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056960842] [2022-03-20 20:59:24,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904538852] [2022-03-20 20:59:24,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904538852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:24,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:24,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 20:59:24,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638769982] [2022-03-20 20:59:24,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638769982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:24,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:24,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175352428] [2022-03-20 20:59:24,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:24,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:24,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 20:59:24,779 INFO L87 Difference]: Start difference. First operand 1038 states and 1386 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:25,041 INFO L93 Difference]: Finished difference Result 1382 states and 1902 transitions. [2022-03-20 20:59:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:25,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-03-20 20:59:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:25,046 INFO L225 Difference]: With dead ends: 1382 [2022-03-20 20:59:25,046 INFO L226 Difference]: Without dead ends: 1062 [2022-03-20 20:59:25,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:25,048 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 155 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:25,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-03-20 20:59:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1058. [2022-03-20 20:59:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 754 states have (on average 1.2612732095490715) internal successors, (951), 765 states have internal predecessors, (951), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-20 20:59:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1405 transitions. [2022-03-20 20:59:25,223 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1405 transitions. Word has length 93 [2022-03-20 20:59:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:25,224 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1405 transitions. [2022-03-20 20:59:25,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1405 transitions. [2022-03-20 20:59:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 20:59:25,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:25,225 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:25,250 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 20:59:25,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:25,449 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-03-20 20:59:25,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:25,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860154512] [2022-03-20 20:59:25,450 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-03-20 20:59:25,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:25,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047811427] [2022-03-20 20:59:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:25,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:25,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:25,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016494838] [2022-03-20 20:59:25,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:25,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:25,458 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 20:59:25,459 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 20:59:25,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:25,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:59:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:25,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:26,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047811427] [2022-03-20 20:59:26,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016494838] [2022-03-20 20:59:26,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016494838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:26,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:26,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 20:59:26,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:26,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860154512] [2022-03-20 20:59:26,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860154512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:26,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:26,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101350809] [2022-03-20 20:59:26,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:26,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:26,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:26,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:26,097 INFO L87 Difference]: Start difference. First operand 1058 states and 1405 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:26,405 INFO L93 Difference]: Finished difference Result 1539 states and 2090 transitions. [2022-03-20 20:59:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:59:26,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-20 20:59:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:26,409 INFO L225 Difference]: With dead ends: 1539 [2022-03-20 20:59:26,409 INFO L226 Difference]: Without dead ends: 1219 [2022-03-20 20:59:26,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:26,410 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 187 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:26,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 327 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:59:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-20 20:59:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1164. [2022-03-20 20:59:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 812 states have (on average 1.2561576354679802) internal successors, (1020), 824 states have internal predecessors, (1020), 262 states have call successors, (262), 90 states have call predecessors, (262), 89 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-20 20:59:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1539 transitions. [2022-03-20 20:59:26,581 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1539 transitions. Word has length 97 [2022-03-20 20:59:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:26,581 INFO L478 AbstractCegarLoop]: Abstraction has 1164 states and 1539 transitions. [2022-03-20 20:59:26,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1539 transitions. [2022-03-20 20:59:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 20:59:26,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:26,583 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:26,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 20:59:26,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 20:59:26,806 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-03-20 20:59:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295337221] [2022-03-20 20:59:26,807 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-03-20 20:59:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357395370] [2022-03-20 20:59:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:26,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:26,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610770080] [2022-03-20 20:59:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:26,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:26,816 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 20:59:26,817 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 20:59:26,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 20:59:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:27,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:27,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357395370] [2022-03-20 20:59:27,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610770080] [2022-03-20 20:59:27,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610770080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:27,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:27,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 20:59:27,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:27,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295337221] [2022-03-20 20:59:27,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295337221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:27,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:27,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:59:27,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823413307] [2022-03-20 20:59:27,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:27,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:59:27,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:27,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:59:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:59:27,338 INFO L87 Difference]: Start difference. First operand 1164 states and 1539 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:27,716 INFO L93 Difference]: Finished difference Result 1434 states and 1877 transitions. [2022-03-20 20:59:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 20:59:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2022-03-20 20:59:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:27,722 INFO L225 Difference]: With dead ends: 1434 [2022-03-20 20:59:27,722 INFO L226 Difference]: Without dead ends: 1427 [2022-03-20 20:59:27,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=468, Invalid=654, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:59:27,723 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:27,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 327 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:27,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-03-20 20:59:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1358. [2022-03-20 20:59:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 940 states have (on average 1.2446808510638299) internal successors, (1170), 965 states have internal predecessors, (1170), 311 states have call successors, (311), 107 states have call predecessors, (311), 106 states have return successors, (305), 285 states have call predecessors, (305), 305 states have call successors, (305) [2022-03-20 20:59:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1786 transitions. [2022-03-20 20:59:27,911 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1786 transitions. Word has length 98 [2022-03-20 20:59:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:27,911 INFO L478 AbstractCegarLoop]: Abstraction has 1358 states and 1786 transitions. [2022-03-20 20:59:27,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1786 transitions. [2022-03-20 20:59:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 20:59:27,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:27,913 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:27,936 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 20:59:28,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 20:59:28,128 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2022-03-20 20:59:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:28,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264328907] [2022-03-20 20:59:28,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 2 times [2022-03-20 20:59:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046923000] [2022-03-20 20:59:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:28,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:28,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285023442] [2022-03-20 20:59:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:28,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:28,138 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 20:59:28,139 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 20:59:28,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 20:59:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:28,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 39 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046923000] [2022-03-20 20:59:28,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285023442] [2022-03-20 20:59:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285023442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:28,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 20:59:28,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:28,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264328907] [2022-03-20 20:59:28,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264328907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:28,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:28,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750867902] [2022-03-20 20:59:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:28,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:28,662 INFO L87 Difference]: Start difference. First operand 1358 states and 1786 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:29,040 INFO L93 Difference]: Finished difference Result 1838 states and 2503 transitions. [2022-03-20 20:59:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 20:59:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2022-03-20 20:59:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:29,045 INFO L225 Difference]: With dead ends: 1838 [2022-03-20 20:59:29,045 INFO L226 Difference]: Without dead ends: 1358 [2022-03-20 20:59:29,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-20 20:59:29,047 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 183 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:29,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 339 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-20 20:59:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1334. [2022-03-20 20:59:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 924 states have (on average 1.2272727272727273) internal successors, (1134), 948 states have internal predecessors, (1134), 304 states have call successors, (304), 106 states have call predecessors, (304), 105 states have return successors, (298), 279 states have call predecessors, (298), 298 states have call successors, (298) [2022-03-20 20:59:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1736 transitions. [2022-03-20 20:59:29,272 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1736 transitions. Word has length 99 [2022-03-20 20:59:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:29,273 INFO L478 AbstractCegarLoop]: Abstraction has 1334 states and 1736 transitions. [2022-03-20 20:59:29,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1736 transitions. [2022-03-20 20:59:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:59:29,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:29,274 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:29,299 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 20:59:29,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 20:59:29,487 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 5 times [2022-03-20 20:59:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866908686] [2022-03-20 20:59:29,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 6 times [2022-03-20 20:59:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648047925] [2022-03-20 20:59:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:29,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:29,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977728851] [2022-03-20 20:59:29,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:29,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:29,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:29,496 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 20:59:29,497 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 20:59:29,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 20:59:29,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 20:59:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:30,170 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 57 proven. 35 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-03-20 20:59:30,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:30,479 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:30,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:30,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648047925] [2022-03-20 20:59:30,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:30,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977728851] [2022-03-20 20:59:30,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977728851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:59:30,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:59:30,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 20:59:30,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:30,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866908686] [2022-03-20 20:59:30,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866908686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:30,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:30,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 20:59:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765909811] [2022-03-20 20:59:30,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:30,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 20:59:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 20:59:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 20:59:30,649 INFO L87 Difference]: Start difference. First operand 1334 states and 1736 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:31,360 INFO L93 Difference]: Finished difference Result 1565 states and 2045 transitions. [2022-03-20 20:59:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 20:59:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-03-20 20:59:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:31,367 INFO L225 Difference]: With dead ends: 1565 [2022-03-20 20:59:31,367 INFO L226 Difference]: Without dead ends: 1556 [2022-03-20 20:59:31,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:59:31,368 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:31,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 364 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 20:59:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-20 20:59:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1518. [2022-03-20 20:59:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1051 states have (on average 1.2274024738344433) internal successors, (1290), 1078 states have internal predecessors, (1290), 350 states have call successors, (350), 118 states have call predecessors, (350), 116 states have return successors, (345), 321 states have call predecessors, (345), 345 states have call successors, (345) [2022-03-20 20:59:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1985 transitions. [2022-03-20 20:59:31,555 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1985 transitions. Word has length 104 [2022-03-20 20:59:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:31,555 INFO L478 AbstractCegarLoop]: Abstraction has 1518 states and 1985 transitions. [2022-03-20 20:59:31,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:59:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1985 transitions. [2022-03-20 20:59:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 20:59:31,557 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:31,557 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:31,582 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 20:59:31,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,779 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 5 times [2022-03-20 20:59:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413777706] [2022-03-20 20:59:31,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 6 times [2022-03-20 20:59:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144283661] [2022-03-20 20:59:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:31,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:31,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:31,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495085188] [2022-03-20 20:59:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 20:59:31,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:31,787 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 20:59:31,789 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 20:59:31,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 20:59:31,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 20:59:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 20:59:32,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-20 20:59:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144283661] [2022-03-20 20:59:32,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495085188] [2022-03-20 20:59:32,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495085188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:32,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2022-03-20 20:59:32,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413777706] [2022-03-20 20:59:32,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413777706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:32,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 20:59:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288861213] [2022-03-20 20:59:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:32,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 20:59:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 20:59:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 20:59:32,851 INFO L87 Difference]: Start difference. First operand 1518 states and 1985 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:59:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:33,978 INFO L93 Difference]: Finished difference Result 1833 states and 2418 transitions. [2022-03-20 20:59:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 20:59:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2022-03-20 20:59:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:33,986 INFO L225 Difference]: With dead ends: 1833 [2022-03-20 20:59:33,986 INFO L226 Difference]: Without dead ends: 1831 [2022-03-20 20:59:33,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:33,987 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 148 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:33,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 838 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 20:59:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-20 20:59:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1765. [2022-03-20 20:59:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1240 states have (on average 1.2508064516129032) internal successors, (1551), 1274 states have internal predecessors, (1551), 397 states have call successors, (397), 129 states have call predecessors, (397), 127 states have return successors, (392), 361 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-20 20:59:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2340 transitions. [2022-03-20 20:59:34,309 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2340 transitions. Word has length 102 [2022-03-20 20:59:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:34,309 INFO L478 AbstractCegarLoop]: Abstraction has 1765 states and 2340 transitions. [2022-03-20 20:59:34,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 20:59:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2340 transitions. [2022-03-20 20:59:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 20:59:34,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:34,311 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:34,334 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 20:59:34,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 20:59:34,531 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 7 times [2022-03-20 20:59:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [576961033] [2022-03-20 20:59:34,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 8 times [2022-03-20 20:59:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692218247] [2022-03-20 20:59:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:34,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:34,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668926984] [2022-03-20 20:59:34,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:34,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:34,539 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 20:59:34,540 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 20:59:34,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:34,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 20:59:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:34,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692218247] [2022-03-20 20:59:35,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668926984] [2022-03-20 20:59:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668926984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:35,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:35,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 20:59:35,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [576961033] [2022-03-20 20:59:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [576961033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:35,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:35,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 20:59:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000386043] [2022-03-20 20:59:35,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:35,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 20:59:35,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 20:59:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:59:35,074 INFO L87 Difference]: Start difference. First operand 1765 states and 2340 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:35,592 INFO L93 Difference]: Finished difference Result 2634 states and 3640 transitions. [2022-03-20 20:59:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 20:59:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-03-20 20:59:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:35,599 INFO L225 Difference]: With dead ends: 2634 [2022-03-20 20:59:35,599 INFO L226 Difference]: Without dead ends: 1870 [2022-03-20 20:59:35,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=657, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:59:35,602 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 232 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:35,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 339 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-03-20 20:59:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1825. [2022-03-20 20:59:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1298 states have (on average 1.2496147919876734) internal successors, (1622), 1319 states have internal predecessors, (1622), 398 states have call successors, (398), 130 states have call predecessors, (398), 128 states have return successors, (393), 375 states have call predecessors, (393), 393 states have call successors, (393) [2022-03-20 20:59:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2413 transitions. [2022-03-20 20:59:35,899 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2413 transitions. Word has length 103 [2022-03-20 20:59:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:35,900 INFO L478 AbstractCegarLoop]: Abstraction has 1825 states and 2413 transitions. [2022-03-20 20:59:35,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2413 transitions. [2022-03-20 20:59:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 20:59:35,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:35,902 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:35,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 20:59:36,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 20:59:36,115 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 7 times [2022-03-20 20:59:36,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529403077] [2022-03-20 20:59:36,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 8 times [2022-03-20 20:59:36,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016119879] [2022-03-20 20:59:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:36,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526666058] [2022-03-20 20:59:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:36,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:36,124 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 20:59:36,125 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 20:59:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 20:59:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 20:59:36,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 69 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 20:59:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016119879] [2022-03-20 20:59:36,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526666058] [2022-03-20 20:59:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526666058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:36,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:36,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 20:59:36,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529403077] [2022-03-20 20:59:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529403077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:36,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:36,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:59:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944874855] [2022-03-20 20:59:36,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:36,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:59:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:59:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:36,794 INFO L87 Difference]: Start difference. First operand 1825 states and 2413 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:37,517 INFO L93 Difference]: Finished difference Result 2758 states and 3762 transitions. [2022-03-20 20:59:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 20:59:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2022-03-20 20:59:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:37,525 INFO L225 Difference]: With dead ends: 2758 [2022-03-20 20:59:37,526 INFO L226 Difference]: Without dead ends: 2189 [2022-03-20 20:59:37,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=556, Invalid=776, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 20:59:37,528 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 271 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:37,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 352 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:59:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-03-20 20:59:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2064. [2022-03-20 20:59:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1436 states have (on average 1.2395543175487465) internal successors, (1780), 1459 states have internal predecessors, (1780), 474 states have call successors, (474), 155 states have call predecessors, (474), 153 states have return successors, (468), 449 states have call predecessors, (468), 468 states have call successors, (468) [2022-03-20 20:59:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2722 transitions. [2022-03-20 20:59:37,985 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2722 transitions. Word has length 104 [2022-03-20 20:59:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:37,985 INFO L478 AbstractCegarLoop]: Abstraction has 2064 states and 2722 transitions. [2022-03-20 20:59:37,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 20:59:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2722 transitions. [2022-03-20 20:59:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 20:59:37,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:37,987 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:38,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 20:59:38,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 20:59:38,203 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 7 times [2022-03-20 20:59:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716150267] [2022-03-20 20:59:38,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 8 times [2022-03-20 20:59:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435686757] [2022-03-20 20:59:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:38,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188548238] [2022-03-20 20:59:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:38,211 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 20:59:38,223 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 20:59:38,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:38,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:38,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 20:59:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 20:59:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 20:59:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:40,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435686757] [2022-03-20 20:59:40,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:40,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188548238] [2022-03-20 20:59:40,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188548238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:40,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:40,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-20 20:59:40,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:40,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716150267] [2022-03-20 20:59:40,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716150267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:40,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:40,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 20:59:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711748792] [2022-03-20 20:59:40,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:40,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 20:59:40,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:40,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 20:59:40,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-20 20:59:40,431 INFO L87 Difference]: Start difference. First operand 2064 states and 2722 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 20:59:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:41,469 INFO L93 Difference]: Finished difference Result 2130 states and 2803 transitions. [2022-03-20 20:59:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:59:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2022-03-20 20:59:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:41,477 INFO L225 Difference]: With dead ends: 2130 [2022-03-20 20:59:41,477 INFO L226 Difference]: Without dead ends: 2125 [2022-03-20 20:59:41,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:41,478 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 64 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:41,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 743 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 20:59:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-03-20 20:59:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2071. [2022-03-20 20:59:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1442 states have (on average 1.2371705963938973) internal successors, (1784), 1466 states have internal predecessors, (1784), 471 states have call successors, (471), 158 states have call predecessors, (471), 157 states have return successors, (466), 446 states have call predecessors, (466), 466 states have call successors, (466) [2022-03-20 20:59:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2721 transitions. [2022-03-20 20:59:41,820 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2721 transitions. Word has length 108 [2022-03-20 20:59:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:41,821 INFO L478 AbstractCegarLoop]: Abstraction has 2071 states and 2721 transitions. [2022-03-20 20:59:41,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 20:59:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2721 transitions. [2022-03-20 20:59:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 20:59:41,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:41,822 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 20:59:41,846 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 20:59:42,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 20:59:42,036 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 9 times [2022-03-20 20:59:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:42,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647373906] [2022-03-20 20:59:42,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 10 times [2022-03-20 20:59:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:42,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353628398] [2022-03-20 20:59:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:42,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66017440] [2022-03-20 20:59:42,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:59:42,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:42,046 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 20:59:42,047 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 20:59:42,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:59:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 20:59:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 20:59:43,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 20:59:49,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353628398] [2022-03-20 20:59:49,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66017440] [2022-03-20 20:59:49,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66017440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:49,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:49,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 20:59:49,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647373906] [2022-03-20 20:59:49,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647373906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:49,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:49,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 20:59:49,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546926761] [2022-03-20 20:59:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:49,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 20:59:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 20:59:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 20:59:49,181 INFO L87 Difference]: Start difference. First operand 2071 states and 2721 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:59:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:59:51,155 INFO L93 Difference]: Finished difference Result 2221 states and 2903 transitions. [2022-03-20 20:59:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 20:59:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 111 [2022-03-20 20:59:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:59:51,162 INFO L225 Difference]: With dead ends: 2221 [2022-03-20 20:59:51,162 INFO L226 Difference]: Without dead ends: 2218 [2022-03-20 20:59:51,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 20:59:51,163 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 122 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:59:51,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1176 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 20:59:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-20 20:59:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2137. [2022-03-20 20:59:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1487 states have (on average 1.2313382649630127) internal successors, (1831), 1511 states have internal predecessors, (1831), 479 states have call successors, (479), 171 states have call predecessors, (479), 170 states have return successors, (474), 454 states have call predecessors, (474), 474 states have call successors, (474) [2022-03-20 20:59:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2784 transitions. [2022-03-20 20:59:51,562 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2784 transitions. Word has length 111 [2022-03-20 20:59:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:59:51,563 INFO L478 AbstractCegarLoop]: Abstraction has 2137 states and 2784 transitions. [2022-03-20 20:59:51,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 20:59:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2784 transitions. [2022-03-20 20:59:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:59:51,564 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:59:51,564 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:59:51,589 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 20:59:51,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:51,779 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:59:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:59:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 7 times [2022-03-20 20:59:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699739104] [2022-03-20 20:59:51,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:59:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 8 times [2022-03-20 20:59:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:59:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610557015] [2022-03-20 20:59:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:59:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:59:51,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:59:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170378867] [2022-03-20 20:59:51,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:59:51,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:59:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:59:51,793 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 20:59:51,795 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 20:59:51,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:59:51,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:59:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 20:59:51,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:59:53,718 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:53,720 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 20:59:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 47 proven. 113 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 20:59:53,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:59:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-20 20:59:54,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:59:54,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610557015] [2022-03-20 20:59:54,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:59:54,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170378867] [2022-03-20 20:59:54,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170378867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:59:54,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:59:54,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-20 20:59:54,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:59:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699739104] [2022-03-20 20:59:54,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699739104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:59:54,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:59:54,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 20:59:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915900453] [2022-03-20 20:59:54,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:59:54,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 20:59:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:59:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 20:59:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-20 20:59:54,829 INFO L87 Difference]: Start difference. First operand 2137 states and 2784 transitions. Second operand has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 20:59:57,133 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 20:59:59,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:00:01,559 WARN L534 Checker$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 21:00:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:02,530 INFO L93 Difference]: Finished difference Result 2272 states and 2960 transitions. [2022-03-20 21:00:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:00:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 109 [2022-03-20 21:00:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:02,537 INFO L225 Difference]: With dead ends: 2272 [2022-03-20 21:00:02,537 INFO L226 Difference]: Without dead ends: 2270 [2022-03-20 21:00:02,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:00:02,538 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 111 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:02,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1321 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1326 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2022-03-20 21:00:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-03-20 21:00:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2212. [2022-03-20 21:00:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1537 states have (on average 1.2335718932986337) internal successors, (1896), 1562 states have internal predecessors, (1896), 497 states have call successors, (497), 178 states have call predecessors, (497), 177 states have return successors, (492), 471 states have call predecessors, (492), 492 states have call successors, (492) [2022-03-20 21:00:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2885 transitions. [2022-03-20 21:00:02,937 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2885 transitions. Word has length 109 [2022-03-20 21:00:02,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:02,938 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2885 transitions. [2022-03-20 21:00:02,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 21:00:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2885 transitions. [2022-03-20 21:00:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 21:00:02,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:02,940 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:02,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 21:00:03,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:03,140 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 9 times [2022-03-20 21:00:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891316601] [2022-03-20 21:00:03,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 10 times [2022-03-20 21:00:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332114558] [2022-03-20 21:00:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:03,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:03,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551388568] [2022-03-20 21:00:03,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:03,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:03,192 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 21:00:03,193 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 21:00:03,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:00:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 21:00:03,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 78 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 21:00:03,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332114558] [2022-03-20 21:00:03,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551388568] [2022-03-20 21:00:03,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551388568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:03,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:03,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:00:03,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891316601] [2022-03-20 21:00:03,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891316601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:03,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:03,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:03,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660053445] [2022-03-20 21:00:03,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:03,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:03,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:00:03,818 INFO L87 Difference]: Start difference. First operand 2212 states and 2885 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 21:00:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:04,613 INFO L93 Difference]: Finished difference Result 3498 states and 4737 transitions. [2022-03-20 21:00:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:00:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2022-03-20 21:00:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:04,623 INFO L225 Difference]: With dead ends: 3498 [2022-03-20 21:00:04,623 INFO L226 Difference]: Without dead ends: 2692 [2022-03-20 21:00:04,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=653, Invalid=907, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:00:04,626 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 284 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:04,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 394 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-03-20 21:00:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2630. [2022-03-20 21:00:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 1836 states have (on average 1.2167755991285403) internal successors, (2234), 1862 states have internal predecessors, (2234), 587 states have call successors, (587), 207 states have call predecessors, (587), 206 states have return successors, (581), 560 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-20 21:00:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3402 transitions. [2022-03-20 21:00:05,104 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3402 transitions. Word has length 110 [2022-03-20 21:00:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:05,105 INFO L478 AbstractCegarLoop]: Abstraction has 2630 states and 3402 transitions. [2022-03-20 21:00:05,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 21:00:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3402 transitions. [2022-03-20 21:00:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 21:00:05,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:05,107 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-03-20 21:00:05,155 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 21:00:05,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-20 21:00:05,329 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 11 times [2022-03-20 21:00:05,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:05,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317353976] [2022-03-20 21:00:05,330 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 12 times [2022-03-20 21:00:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:05,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596734922] [2022-03-20 21:00:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:05,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447267667] [2022-03-20 21:00:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:00:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:05,339 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 21:00:05,340 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 21:00:05,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:00:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 21:00:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 21:00:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:12,622 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:12,634 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 21:00:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596734922] [2022-03-20 21:00:16,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447267667] [2022-03-20 21:00:16,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447267667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:16,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:16,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 37 [2022-03-20 21:00:16,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317353976] [2022-03-20 21:00:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317353976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:16,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:16,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:00:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152643455] [2022-03-20 21:00:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:16,648 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:00:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:00:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:00:16,649 INFO L87 Difference]: Start difference. First operand 2630 states and 3402 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 21:00:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:18,117 INFO L93 Difference]: Finished difference Result 2778 states and 3585 transitions. [2022-03-20 21:00:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:00:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2022-03-20 21:00:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:18,125 INFO L225 Difference]: With dead ends: 2778 [2022-03-20 21:00:18,125 INFO L226 Difference]: Without dead ends: 2771 [2022-03-20 21:00:18,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:00:18,128 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 95 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:18,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 942 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:00:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-03-20 21:00:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2709. [2022-03-20 21:00:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 1888 states have (on average 1.2139830508474576) internal successors, (2292), 1913 states have internal predecessors, (2292), 604 states have call successors, (604), 217 states have call predecessors, (604), 216 states have return successors, (598), 578 states have call predecessors, (598), 598 states have call successors, (598) [2022-03-20 21:00:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3494 transitions. [2022-03-20 21:00:18,595 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3494 transitions. Word has length 115 [2022-03-20 21:00:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:18,595 INFO L478 AbstractCegarLoop]: Abstraction has 2709 states and 3494 transitions. [2022-03-20 21:00:18,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 21:00:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3494 transitions. [2022-03-20 21:00:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 21:00:18,597 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:18,597 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-03-20 21:00:18,621 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 21:00:18,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 21:00:18,821 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 13 times [2022-03-20 21:00:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210184027] [2022-03-20 21:00:18,822 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 14 times [2022-03-20 21:00:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:18,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684585851] [2022-03-20 21:00:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:18,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:18,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24371722] [2022-03-20 21:00:18,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:18,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:18,831 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 21:00:18,834 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 21:00:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:18,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 21:00:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:19,519 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 85 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-20 21:00:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-20 21:00:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684585851] [2022-03-20 21:00:29,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24371722] [2022-03-20 21:00:29,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24371722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:29,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:29,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 36 [2022-03-20 21:00:29,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:29,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210184027] [2022-03-20 21:00:29,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210184027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:29,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:29,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:00:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004387888] [2022-03-20 21:00:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:29,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:00:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:00:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:00:29,219 INFO L87 Difference]: Start difference. First operand 2709 states and 3494 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 21:00:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:31,317 INFO L93 Difference]: Finished difference Result 2979 states and 3842 transitions. [2022-03-20 21:00:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:00:31,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 115 [2022-03-20 21:00:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:31,324 INFO L225 Difference]: With dead ends: 2979 [2022-03-20 21:00:31,324 INFO L226 Difference]: Without dead ends: 2976 [2022-03-20 21:00:31,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:00:31,325 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 129 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:31,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1214 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 21:00:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-03-20 21:00:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2912. [2022-03-20 21:00:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2103960396039604) internal successors, (2445), 2046 states have internal predecessors, (2445), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-20 21:00:31,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3747 transitions. [2022-03-20 21:00:31,841 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3747 transitions. Word has length 115 [2022-03-20 21:00:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:31,841 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3747 transitions. [2022-03-20 21:00:31,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 21:00:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3747 transitions. [2022-03-20 21:00:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 21:00:31,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:31,843 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 21:00:31,866 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 21:00:32,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 21:00:32,059 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 3 times [2022-03-20 21:00:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2065751075] [2022-03-20 21:00:32,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 4 times [2022-03-20 21:00:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932011091] [2022-03-20 21:00:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:32,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:32,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634872853] [2022-03-20 21:00:32,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:32,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:32,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:32,068 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 21:00:32,069 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 21:00:32,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:32,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:00:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:32,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932011091] [2022-03-20 21:00:32,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634872853] [2022-03-20 21:00:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634872853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:32,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 21:00:32,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:32,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2065751075] [2022-03-20 21:00:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2065751075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:32,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:00:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568363356] [2022-03-20 21:00:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:32,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:00:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:00:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:00:32,775 INFO L87 Difference]: Start difference. First operand 2912 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:33,507 INFO L93 Difference]: Finished difference Result 2925 states and 3756 transitions. [2022-03-20 21:00:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:00:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-03-20 21:00:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:33,515 INFO L225 Difference]: With dead ends: 2925 [2022-03-20 21:00:33,516 INFO L226 Difference]: Without dead ends: 2918 [2022-03-20 21:00:33,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=774, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:00:33,517 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 262 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:33,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 347 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-03-20 21:00:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2912. [2022-03-20 21:00:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2074257425742574) internal successors, (2439), 2046 states have internal predecessors, (2439), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-20 21:00:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3741 transitions. [2022-03-20 21:00:34,189 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3741 transitions. Word has length 121 [2022-03-20 21:00:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:34,189 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3741 transitions. [2022-03-20 21:00:34,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3741 transitions. [2022-03-20 21:00:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 21:00:34,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:34,192 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-20 21:00:34,219 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 21:00:34,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:34,416 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 15 times [2022-03-20 21:00:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712682095] [2022-03-20 21:00:34,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 16 times [2022-03-20 21:00:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:34,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565561089] [2022-03-20 21:00:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:34,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:34,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989945009] [2022-03-20 21:00:34,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:34,425 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 21:00:34,426 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 21:00:34,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:00:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:38,513 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 86 proven. 110 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 21:00:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:40,688 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:00:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565561089] [2022-03-20 21:00:43,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989945009] [2022-03-20 21:00:43,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989945009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:00:43,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:00:43,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 21:00:43,537 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712682095] [2022-03-20 21:00:43,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712682095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:43,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:43,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 21:00:43,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719391412] [2022-03-20 21:00:43,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:43,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 21:00:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 21:00:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 21:00:43,539 INFO L87 Difference]: Start difference. First operand 2912 states and 3741 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 21:00:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:50,817 INFO L93 Difference]: Finished difference Result 3037 states and 3905 transitions. [2022-03-20 21:00:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 21:00:50,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 122 [2022-03-20 21:00:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:50,827 INFO L225 Difference]: With dead ends: 3037 [2022-03-20 21:00:50,827 INFO L226 Difference]: Without dead ends: 3034 [2022-03-20 21:00:50,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:00:50,828 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:50,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1493 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 21:00:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-03-20 21:00:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2998. [2022-03-20 21:00:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2077 states have (on average 1.2103996148290803) internal successors, (2514), 2104 states have internal predecessors, (2514), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3860 transitions. [2022-03-20 21:00:51,539 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3860 transitions. Word has length 122 [2022-03-20 21:00:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:51,540 INFO L478 AbstractCegarLoop]: Abstraction has 2998 states and 3860 transitions. [2022-03-20 21:00:51,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-20 21:00:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3860 transitions. [2022-03-20 21:00:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 21:00:51,541 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:51,541 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:00:51,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 21:00:51,742 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,SelfDestructingSolverStorable47 [2022-03-20 21:00:51,742 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 9 times [2022-03-20 21:00:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:51,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1581366131] [2022-03-20 21:00:51,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 10 times [2022-03-20 21:00:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021751083] [2022-03-20 21:00:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:51,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:51,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030775965] [2022-03-20 21:00:51,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:51,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:51,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:51,752 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 21:00:51,753 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 21:00:51,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:51,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:00:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:52,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021751083] [2022-03-20 21:00:52,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030775965] [2022-03-20 21:00:52,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030775965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:52,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:52,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:00:52,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:52,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1581366131] [2022-03-20 21:00:52,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1581366131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:52,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:52,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:52,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108008900] [2022-03-20 21:00:52,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:52,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:00:52,424 INFO L87 Difference]: Start difference. First operand 2998 states and 3860 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:53,255 INFO L93 Difference]: Finished difference Result 3075 states and 3938 transitions. [2022-03-20 21:00:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:00:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2022-03-20 21:00:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:53,262 INFO L225 Difference]: With dead ends: 3075 [2022-03-20 21:00:53,262 INFO L226 Difference]: Without dead ends: 3068 [2022-03-20 21:00:53,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=656, Invalid=904, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:00:53,264 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 338 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:53,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 392 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-03-20 21:00:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3004. [2022-03-20 21:00:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2083 states have (on average 1.2097935669707154) internal successors, (2520), 2110 states have internal predecessors, (2520), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3866 transitions. [2022-03-20 21:00:53,819 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3866 transitions. Word has length 125 [2022-03-20 21:00:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:53,820 INFO L478 AbstractCegarLoop]: Abstraction has 3004 states and 3866 transitions. [2022-03-20 21:00:53,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3866 transitions. [2022-03-20 21:00:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 21:00:53,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:53,822 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-03-20 21:00:53,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 21:00:54,022 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,SelfDestructingSolverStorable48 [2022-03-20 21:00:54,023 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 3 times [2022-03-20 21:00:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791517418] [2022-03-20 21:00:54,024 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 4 times [2022-03-20 21:00:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057768678] [2022-03-20 21:00:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:54,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:54,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:54,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176417356] [2022-03-20 21:00:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:00:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:54,031 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 21:00:54,033 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 21:00:54,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:00:54,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:54,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:00:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:00:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 83 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:00:54,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:54,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057768678] [2022-03-20 21:00:54,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176417356] [2022-03-20 21:00:54,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176417356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:54,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:54,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:00:54,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791517418] [2022-03-20 21:00:54,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791517418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:54,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:54,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:00:54,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820833773] [2022-03-20 21:00:54,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:54,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:00:54,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:00:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:00:54,701 INFO L87 Difference]: Start difference. First operand 3004 states and 3866 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:55,550 INFO L93 Difference]: Finished difference Result 3658 states and 4844 transitions. [2022-03-20 21:00:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:00:55,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2022-03-20 21:00:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:55,557 INFO L225 Difference]: With dead ends: 3658 [2022-03-20 21:00:55,557 INFO L226 Difference]: Without dead ends: 3089 [2022-03-20 21:00:55,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=654, Invalid=906, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:00:55,559 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 284 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:55,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 408 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:00:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-03-20 21:00:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3069. [2022-03-20 21:00:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2148 states have (on average 1.202513966480447) internal successors, (2583), 2175 states have internal predecessors, (2583), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-20 21:00:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 3929 transitions. [2022-03-20 21:00:56,123 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 3929 transitions. Word has length 127 [2022-03-20 21:00:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:56,123 INFO L478 AbstractCegarLoop]: Abstraction has 3069 states and 3929 transitions. [2022-03-20 21:00:56,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:00:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 3929 transitions. [2022-03-20 21:00:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:00:56,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:56,125 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 21:00:56,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-20 21:00:56,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 21:00:56,326 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 17 times [2022-03-20 21:00:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:56,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244864932] [2022-03-20 21:00:56,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 18 times [2022-03-20 21:00:56,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:56,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31018160] [2022-03-20 21:00:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:56,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:56,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285611607] [2022-03-20 21:00:56,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:00:56,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:56,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:56,333 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 21:00:56,334 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 21:00:56,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:00:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 21:00:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:00:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 250 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-20 21:00:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:00:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 21 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 21:00:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:00:56,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31018160] [2022-03-20 21:00:56,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:00:56,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285611607] [2022-03-20 21:00:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285611607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:00:56,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:00:56,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 21:00:56,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:00:56,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244864932] [2022-03-20 21:00:56,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244864932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:00:56,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:00:56,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:00:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416197354] [2022-03-20 21:00:56,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:00:56,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:00:56,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:00:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:00:56,861 INFO L87 Difference]: Start difference. First operand 3069 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 21:00:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:00:57,822 INFO L93 Difference]: Finished difference Result 4973 states and 6641 transitions. [2022-03-20 21:00:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:00:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 131 [2022-03-20 21:00:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:00:57,832 INFO L225 Difference]: With dead ends: 4973 [2022-03-20 21:00:57,832 INFO L226 Difference]: Without dead ends: 3549 [2022-03-20 21:00:57,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:00:57,837 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:00:57,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 278 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:00:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-03-20 21:00:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3240. [2022-03-20 21:00:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 2249 states have (on average 1.2249888839484215) internal successors, (2755), 2282 states have internal predecessors, (2755), 770 states have call successors, (770), 222 states have call predecessors, (770), 220 states have return successors, (764), 735 states have call predecessors, (764), 764 states have call successors, (764) [2022-03-20 21:00:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4289 transitions. [2022-03-20 21:00:58,589 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4289 transitions. Word has length 131 [2022-03-20 21:00:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:00:58,589 INFO L478 AbstractCegarLoop]: Abstraction has 3240 states and 4289 transitions. [2022-03-20 21:00:58,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 21:00:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4289 transitions. [2022-03-20 21:00:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:00:58,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:00:58,591 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-20 21:00:58,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 21:00:58,791 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,SelfDestructingSolverStorable50 [2022-03-20 21:00:58,792 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:00:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:00:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 19 times [2022-03-20 21:00:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:00:58,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [370498126] [2022-03-20 21:00:58,793 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:00:58,793 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 20 times [2022-03-20 21:00:58,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:00:58,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243349384] [2022-03-20 21:00:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:00:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:00:58,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:00:58,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586947759] [2022-03-20 21:00:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:00:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:00:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:00:58,799 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 21:00:58,799 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 21:00:58,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:00:58,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:00:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 21:00:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:01:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 127 proven. 107 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 21:01:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:01:08,625 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:01:08,627 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:02:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 145 proven. 86 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:02:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:02:57,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243349384] [2022-03-20 21:02:57,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:02:57,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586947759] [2022-03-20 21:02:57,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586947759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:02:57,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:02:57,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-20 21:02:57,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:02:57,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [370498126] [2022-03-20 21:02:57,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [370498126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:02:57,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:02:57,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:02:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309704656] [2022-03-20 21:02:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:02:57,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:02:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:02:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:02:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=983, Unknown=1, NotChecked=0, Total=1190 [2022-03-20 21:02:57,680 INFO L87 Difference]: Start difference. First operand 3240 states and 4289 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:01,246 INFO L93 Difference]: Finished difference Result 3374 states and 4467 transitions. [2022-03-20 21:03:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:03:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 131 [2022-03-20 21:03:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:01,252 INFO L225 Difference]: With dead ends: 3374 [2022-03-20 21:03:01,252 INFO L226 Difference]: Without dead ends: 3369 [2022-03-20 21:03:01,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=266, Invalid=1373, Unknown=1, NotChecked=0, Total=1640 [2022-03-20 21:03:01,253 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:01,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 938 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 21:03:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-03-20 21:03:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3351. [2022-03-20 21:03:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2316 states have (on average 1.2258203799654577) internal successors, (2839), 2350 states have internal predecessors, (2839), 803 states have call successors, (803), 232 states have call predecessors, (803), 231 states have return successors, (798), 768 states have call predecessors, (798), 798 states have call successors, (798) [2022-03-20 21:03:01,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4440 transitions. [2022-03-20 21:03:01,926 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4440 transitions. Word has length 131 [2022-03-20 21:03:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:01,926 INFO L478 AbstractCegarLoop]: Abstraction has 3351 states and 4440 transitions. [2022-03-20 21:03:01,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:03:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4440 transitions. [2022-03-20 21:03:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 21:03:01,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:01,928 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-03-20 21:03:01,945 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 21:03:02,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:02,128 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 21 times [2022-03-20 21:03:02,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198954532] [2022-03-20 21:03:02,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 22 times [2022-03-20 21:03:02,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:02,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763037799] [2022-03-20 21:03:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:02,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:02,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907075427] [2022-03-20 21:03:02,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:02,136 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 21:03:02,137 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 21:03:02,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:02,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:02,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 21:03:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 103 proven. 134 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:03:03,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 90 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-20 21:03:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763037799] [2022-03-20 21:03:06,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907075427] [2022-03-20 21:03:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907075427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:06,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:06,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-20 21:03:06,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198954532] [2022-03-20 21:03:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198954532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:06,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:06,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:03:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451557957] [2022-03-20 21:03:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:06,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:03:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:03:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-20 21:03:06,003 INFO L87 Difference]: Start difference. First operand 3351 states and 4440 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:03:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:09,697 INFO L93 Difference]: Finished difference Result 3487 states and 4616 transitions. [2022-03-20 21:03:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:03:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 134 [2022-03-20 21:03:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:09,703 INFO L225 Difference]: With dead ends: 3487 [2022-03-20 21:03:09,703 INFO L226 Difference]: Without dead ends: 3484 [2022-03-20 21:03:09,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:03:09,704 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 93 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:09,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1293 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 21:03:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2022-03-20 21:03:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3372. [2022-03-20 21:03:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2333 states have (on average 1.2228889841405914) internal successors, (2853), 2369 states have internal predecessors, (2853), 800 states have call successors, (800), 239 states have call predecessors, (800), 238 states have return successors, (795), 763 states have call predecessors, (795), 795 states have call successors, (795) [2022-03-20 21:03:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4448 transitions. [2022-03-20 21:03:10,386 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4448 transitions. Word has length 134 [2022-03-20 21:03:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:10,386 INFO L478 AbstractCegarLoop]: Abstraction has 3372 states and 4448 transitions. [2022-03-20 21:03:10,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:03:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4448 transitions. [2022-03-20 21:03:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:03:10,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:10,389 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:10,413 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 21:03:10,603 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,SelfDestructingSolverStorable52 [2022-03-20 21:03:10,603 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 9 times [2022-03-20 21:03:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [348702198] [2022-03-20 21:03:10,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 10 times [2022-03-20 21:03:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551043579] [2022-03-20 21:03:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:10,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:10,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996503472] [2022-03-20 21:03:10,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:10,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:10,611 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 21:03:10,612 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 21:03:10,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:03:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 294 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:11,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551043579] [2022-03-20 21:03:11,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:11,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996503472] [2022-03-20 21:03:11,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996503472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:11,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:11,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:03:11,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:11,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [348702198] [2022-03-20 21:03:11,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [348702198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:11,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:11,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:03:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386849777] [2022-03-20 21:03:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:11,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:03:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:03:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:03:11,393 INFO L87 Difference]: Start difference. First operand 3372 states and 4448 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:12,438 INFO L93 Difference]: Finished difference Result 4559 states and 6225 transitions. [2022-03-20 21:03:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:03:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2022-03-20 21:03:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:12,446 INFO L225 Difference]: With dead ends: 4559 [2022-03-20 21:03:12,446 INFO L226 Difference]: Without dead ends: 3862 [2022-03-20 21:03:12,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=760, Invalid=1046, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:03:12,448 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 281 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:12,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 428 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:03:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2022-03-20 21:03:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3673. [2022-03-20 21:03:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2456 states have (on average 1.22557003257329) internal successors, (3010), 2499 states have internal predecessors, (3010), 944 states have call successors, (944), 273 states have call predecessors, (944), 272 states have return successors, (938), 900 states have call predecessors, (938), 938 states have call successors, (938) [2022-03-20 21:03:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4892 transitions. [2022-03-20 21:03:13,215 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4892 transitions. Word has length 131 [2022-03-20 21:03:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:13,215 INFO L478 AbstractCegarLoop]: Abstraction has 3673 states and 4892 transitions. [2022-03-20 21:03:13,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4892 transitions. [2022-03-20 21:03:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 21:03:13,217 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:13,217 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-20 21:03:13,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 21:03:13,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:13,417 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 1 times [2022-03-20 21:03:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339198605] [2022-03-20 21:03:13,418 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 2 times [2022-03-20 21:03:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:13,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683636212] [2022-03-20 21:03:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:13,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319821086] [2022-03-20 21:03:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:03:13,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:13,426 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 21:03:13,427 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 21:03:13,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:03:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:13,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 21:03:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:17,767 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:17,770 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:17,772 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:03:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 105 proven. 141 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 21:03:18,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 21:03:18,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:18,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683636212] [2022-03-20 21:03:18,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:18,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319821086] [2022-03-20 21:03:18,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319821086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:18,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:18,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-03-20 21:03:18,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:18,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339198605] [2022-03-20 21:03:18,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339198605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:18,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:18,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:03:18,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299536186] [2022-03-20 21:03:18,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:18,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:03:18,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:18,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:03:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:03:18,907 INFO L87 Difference]: Start difference. First operand 3673 states and 4892 transitions. Second operand has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:03:22,110 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 21:03:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:24,463 INFO L93 Difference]: Finished difference Result 3906 states and 5212 transitions. [2022-03-20 21:03:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:03:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 132 [2022-03-20 21:03:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:24,471 INFO L225 Difference]: With dead ends: 3906 [2022-03-20 21:03:24,471 INFO L226 Difference]: Without dead ends: 3904 [2022-03-20 21:03:24,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 21:03:24,472 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 131 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:24,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1414 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1456 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 21:03:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-03-20 21:03:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3758. [2022-03-20 21:03:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 2512 states have (on average 1.2261146496815287) internal successors, (3080), 2556 states have internal predecessors, (3080), 965 states have call successors, (965), 281 states have call predecessors, (965), 280 states have return successors, (959), 920 states have call predecessors, (959), 959 states have call successors, (959) [2022-03-20 21:03:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5004 transitions. [2022-03-20 21:03:25,298 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5004 transitions. Word has length 132 [2022-03-20 21:03:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:25,298 INFO L478 AbstractCegarLoop]: Abstraction has 3758 states and 5004 transitions. [2022-03-20 21:03:25,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:03:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5004 transitions. [2022-03-20 21:03:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 21:03:25,300 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:25,300 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:25,317 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 21:03:25,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:25,501 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 11 times [2022-03-20 21:03:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024712874] [2022-03-20 21:03:25,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 12 times [2022-03-20 21:03:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417873964] [2022-03-20 21:03:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:25,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063390275] [2022-03-20 21:03:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:03:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:25,508 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 21:03:25,509 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 21:03:25,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:03:25,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:03:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:26,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417873964] [2022-03-20 21:03:26,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063390275] [2022-03-20 21:03:26,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063390275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:26,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:26,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 21:03:26,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024712874] [2022-03-20 21:03:26,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024712874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:26,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:26,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:03:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85333410] [2022-03-20 21:03:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:26,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:03:26,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:03:26,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:03:26,425 INFO L87 Difference]: Start difference. First operand 3758 states and 5004 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:27,783 INFO L93 Difference]: Finished difference Result 4545 states and 6055 transitions. [2022-03-20 21:03:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 21:03:27,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 132 [2022-03-20 21:03:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:27,791 INFO L225 Difference]: With dead ends: 4545 [2022-03-20 21:03:27,792 INFO L226 Difference]: Without dead ends: 4538 [2022-03-20 21:03:27,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1194, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:03:27,793 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 390 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:27,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 459 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:03:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2022-03-20 21:03:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4322. [2022-03-20 21:03:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2865 states have (on average 1.2275741710296684) internal successors, (3517), 2953 states have internal predecessors, (3517), 1139 states have call successors, (1139), 318 states have call predecessors, (1139), 317 states have return successors, (1132), 1050 states have call predecessors, (1132), 1132 states have call successors, (1132) [2022-03-20 21:03:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5788 transitions. [2022-03-20 21:03:28,755 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5788 transitions. Word has length 132 [2022-03-20 21:03:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:28,755 INFO L478 AbstractCegarLoop]: Abstraction has 4322 states and 5788 transitions. [2022-03-20 21:03:28,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5788 transitions. [2022-03-20 21:03:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 21:03:28,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:28,757 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:03:28,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 21:03:28,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:28,957 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 3 times [2022-03-20 21:03:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735169927] [2022-03-20 21:03:28,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 4 times [2022-03-20 21:03:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215321012] [2022-03-20 21:03:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:28,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804917192] [2022-03-20 21:03:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:03:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:28,965 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 21:03:28,966 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 21:03:29,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:03:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:03:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 286 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:03:29,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 94 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:03:29,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:03:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215321012] [2022-03-20 21:03:29,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:03:29,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804917192] [2022-03-20 21:03:29,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804917192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:03:29,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:03:29,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:03:29,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:03:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735169927] [2022-03-20 21:03:29,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735169927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:03:29,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:03:29,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:03:29,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256028014] [2022-03-20 21:03:29,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:03:29,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:03:29,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:03:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:03:29,780 INFO L87 Difference]: Start difference. First operand 4322 states and 5788 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:03:31,079 INFO L93 Difference]: Finished difference Result 5509 states and 7644 transitions. [2022-03-20 21:03:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:03:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 133 [2022-03-20 21:03:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:03:31,088 INFO L225 Difference]: With dead ends: 5509 [2022-03-20 21:03:31,088 INFO L226 Difference]: Without dead ends: 4328 [2022-03-20 21:03:31,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1047, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 21:03:31,091 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 375 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:03:31,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 420 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:03:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-20 21:03:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4306. [2022-03-20 21:03:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2852 states have (on average 1.2100280504908836) internal successors, (3451), 2939 states have internal predecessors, (3451), 1137 states have call successors, (1137), 317 states have call predecessors, (1137), 316 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-20 21:03:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5718 transitions. [2022-03-20 21:03:32,034 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5718 transitions. Word has length 133 [2022-03-20 21:03:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:03:32,034 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5718 transitions. [2022-03-20 21:03:32,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:03:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5718 transitions. [2022-03-20 21:03:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:03:32,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:03:32,036 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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 21:03:32,053 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 21:03:32,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:32,236 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:03:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:03:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 23 times [2022-03-20 21:03:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:03:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1686765891] [2022-03-20 21:03:32,237 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:03:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 24 times [2022-03-20 21:03:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:03:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987735807] [2022-03-20 21:03:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:03:32,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:03:32,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:03:32,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506319806] [2022-03-20 21:03:32,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:03:32,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:03:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:03:32,244 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 21:03:32,245 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 21:03:32,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:03:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:03:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 21:03:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:03:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 21:03:34,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:03:44,859 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:04:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 21:04:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987735807] [2022-03-20 21:04:08,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506319806] [2022-03-20 21:04:08,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506319806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:04:08,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:04:08,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-20 21:04:08,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1686765891] [2022-03-20 21:04:08,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1686765891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:08,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:08,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:04:08,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509939531] [2022-03-20 21:04:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:08,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:04:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:04:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1043, Unknown=1, NotChecked=0, Total=1260 [2022-03-20 21:04:08,985 INFO L87 Difference]: Start difference. First operand 4306 states and 5718 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:04:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:04:13,133 INFO L93 Difference]: Finished difference Result 4466 states and 5936 transitions. [2022-03-20 21:04:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:04:13,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 138 [2022-03-20 21:04:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:04:13,141 INFO L225 Difference]: With dead ends: 4466 [2022-03-20 21:04:13,141 INFO L226 Difference]: Without dead ends: 4459 [2022-03-20 21:04:13,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=317, Invalid=1488, Unknown=1, NotChecked=0, Total=1806 [2022-03-20 21:04:13,142 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 90 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:04:13,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 1347 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 21:04:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-03-20 21:04:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4306. [2022-03-20 21:04:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2851 states have (on average 1.2101017186951946) internal successors, (3450), 2938 states have internal predecessors, (3450), 1137 states have call successors, (1137), 318 states have call predecessors, (1137), 317 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-20 21:04:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5717 transitions. [2022-03-20 21:04:14,107 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5717 transitions. Word has length 138 [2022-03-20 21:04:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:04:14,107 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5717 transitions. [2022-03-20 21:04:14,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:04:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5717 transitions. [2022-03-20 21:04:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:04:14,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:04:14,109 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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 21:04:14,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 21:04:14,310 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,SelfDestructingSolverStorable57 [2022-03-20 21:04:14,310 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:04:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:04:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 25 times [2022-03-20 21:04:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:14,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477020158] [2022-03-20 21:04:14,310 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:04:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 26 times [2022-03-20 21:04:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:04:14,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998252407] [2022-03-20 21:04:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:04:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:04:14,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:04:14,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243071475] [2022-03-20 21:04:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:04:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:04:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:04:14,317 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 21:04:14,317 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 21:04:14,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:04:14,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:04:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:04:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:04:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 125 proven. 158 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-20 21:04:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 181 proven. 33 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-03-20 21:04:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998252407] [2022-03-20 21:04:18,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243071475] [2022-03-20 21:04:18,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243071475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:04:18,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:04:18,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-20 21:04:18,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477020158] [2022-03-20 21:04:18,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477020158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:18,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:18,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:04:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162984477] [2022-03-20 21:04:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:18,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:04:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:04:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:04:18,813 INFO L87 Difference]: Start difference. First operand 4306 states and 5717 transitions. Second operand has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:04:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:04:21,074 INFO L93 Difference]: Finished difference Result 4497 states and 5957 transitions. [2022-03-20 21:04:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 21:04:21,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 138 [2022-03-20 21:04:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:04:21,084 INFO L225 Difference]: With dead ends: 4497 [2022-03-20 21:04:21,084 INFO L226 Difference]: Without dead ends: 4494 [2022-03-20 21:04:21,085 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:04:21,085 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 103 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:04:21,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1234 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 21:04:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-03-20 21:04:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4378. [2022-03-20 21:04:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 2901 states have (on average 1.2071699413995174) internal successors, (3502), 2990 states have internal predecessors, (3502), 1147 states have call successors, (1147), 330 states have call predecessors, (1147), 329 states have return successors, (1140), 1057 states have call predecessors, (1140), 1140 states have call successors, (1140) [2022-03-20 21:04:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 5789 transitions. [2022-03-20 21:04:22,059 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 5789 transitions. Word has length 138 [2022-03-20 21:04:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:04:22,059 INFO L478 AbstractCegarLoop]: Abstraction has 4378 states and 5789 transitions. [2022-03-20 21:04:22,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 21:04:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 5789 transitions. [2022-03-20 21:04:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:04:22,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:04:22,061 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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 21:04:22,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 21:04:22,261 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,SelfDestructingSolverStorable58 [2022-03-20 21:04:22,261 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:04:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:04:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 27 times [2022-03-20 21:04:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:22,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113059605] [2022-03-20 21:04:22,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:04:22,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 28 times [2022-03-20 21:04:22,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:04:22,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803469175] [2022-03-20 21:04:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:04:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:04:22,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:04:22,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289480073] [2022-03-20 21:04:22,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:04:22,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:04:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:04:22,269 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 21:04:22,270 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 21:04:22,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:04:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:04:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 21:04:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:04:23,067 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:04:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 158 proven. 128 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 21:04:26,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 188 proven. 19 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-03-20 21:04:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803469175] [2022-03-20 21:04:35,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289480073] [2022-03-20 21:04:35,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289480073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:04:35,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:04:35,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 38 [2022-03-20 21:04:35,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113059605] [2022-03-20 21:04:35,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113059605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:35,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:35,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 21:04:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737440143] [2022-03-20 21:04:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:35,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 21:04:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 21:04:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:04:35,210 INFO L87 Difference]: Start difference. First operand 4378 states and 5789 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 21:04:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:04:41,242 INFO L93 Difference]: Finished difference Result 4640 states and 6130 transitions. [2022-03-20 21:04:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:04:41,245 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 138 [2022-03-20 21:04:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:04:41,253 INFO L225 Difference]: With dead ends: 4640 [2022-03-20 21:04:41,253 INFO L226 Difference]: Without dead ends: 4637 [2022-03-20 21:04:41,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:04:41,254 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 144 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:04:41,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1276 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 21:04:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-03-20 21:04:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4511. [2022-03-20 21:04:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 2986 states have (on average 1.2069658405894172) internal successors, (3604), 3078 states have internal predecessors, (3604), 1180 states have call successors, (1180), 345 states have call predecessors, (1180), 344 states have return successors, (1173), 1087 states have call predecessors, (1173), 1173 states have call successors, (1173) [2022-03-20 21:04:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5957 transitions. [2022-03-20 21:04:42,263 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5957 transitions. Word has length 138 [2022-03-20 21:04:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:04:42,263 INFO L478 AbstractCegarLoop]: Abstraction has 4511 states and 5957 transitions. [2022-03-20 21:04:42,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 21:04:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5957 transitions. [2022-03-20 21:04:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 21:04:42,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:04:42,266 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 21:04:42,289 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 21:04:42,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 21:04:42,487 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:04:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:04:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 9 times [2022-03-20 21:04:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910575250] [2022-03-20 21:04:42,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:04:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 10 times [2022-03-20 21:04:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:04:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475279240] [2022-03-20 21:04:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:04:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:04:42,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:04:42,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635403196] [2022-03-20 21:04:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:04:42,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:04:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:04:42,495 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 21:04:42,496 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 21:04:42,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:04:42,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:04:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 21:04:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:04:50,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:04:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 74 proven. 201 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-20 21:04:54,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:04:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:04:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475279240] [2022-03-20 21:04:59,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:04:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635403196] [2022-03-20 21:04:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635403196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:04:59,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:04:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-20 21:04:59,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:04:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910575250] [2022-03-20 21:04:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910575250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:04:59,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:04:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 21:04:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379255698] [2022-03-20 21:04:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:04:59,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 21:04:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:04:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 21:04:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:04:59,368 INFO L87 Difference]: Start difference. First operand 4511 states and 5957 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:05:19,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:05:23,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:05:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:24,565 INFO L93 Difference]: Finished difference Result 4756 states and 6289 transitions. [2022-03-20 21:05:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:05:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 136 [2022-03-20 21:05:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:24,574 INFO L225 Difference]: With dead ends: 4756 [2022-03-20 21:05:24,574 INFO L226 Difference]: Without dead ends: 4754 [2022-03-20 21:05:24,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:05:24,575 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 150 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:24,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1699 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-03-20 21:05:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-03-20 21:05:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4685. [2022-03-20 21:05:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3098 states have (on average 1.21078114912847) internal successors, (3751), 3194 states have internal predecessors, (3751), 1229 states have call successors, (1229), 358 states have call predecessors, (1229), 357 states have return successors, (1222), 1132 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-20 21:05:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6202 transitions. [2022-03-20 21:05:25,661 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6202 transitions. Word has length 136 [2022-03-20 21:05:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:25,661 INFO L478 AbstractCegarLoop]: Abstraction has 4685 states and 6202 transitions. [2022-03-20 21:05:25,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-20 21:05:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6202 transitions. [2022-03-20 21:05:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 21:05:25,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:25,663 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:25,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 21:05:25,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:25,863 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 11 times [2022-03-20 21:05:25,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181757877] [2022-03-20 21:05:25,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 12 times [2022-03-20 21:05:25,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951114591] [2022-03-20 21:05:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:25,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:25,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486820411] [2022-03-20 21:05:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:25,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:25,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:25,872 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 21:05:25,872 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 21:05:26,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 21:05:26,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:05:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 306 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:05:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 114 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:05:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951114591] [2022-03-20 21:05:27,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486820411] [2022-03-20 21:05:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486820411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:27,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:27,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 21:05:27,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181757877] [2022-03-20 21:05:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181757877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:27,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:27,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:05:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048089429] [2022-03-20 21:05:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:27,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:05:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:05:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:05:27,082 INFO L87 Difference]: Start difference. First operand 4685 states and 6202 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:28,572 INFO L93 Difference]: Finished difference Result 6236 states and 8592 transitions. [2022-03-20 21:05:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 21:05:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 137 [2022-03-20 21:05:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:28,586 INFO L225 Difference]: With dead ends: 6236 [2022-03-20 21:05:28,586 INFO L226 Difference]: Without dead ends: 4946 [2022-03-20 21:05:28,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=873, Invalid=1197, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:05:28,592 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 389 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:28,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 421 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:05:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-03-20 21:05:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4849. [2022-03-20 21:05:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 3260 states have (on average 1.211042944785276) internal successors, (3948), 3313 states have internal predecessors, (3948), 1229 states have call successors, (1229), 360 states have call predecessors, (1229), 359 states have return successors, (1222), 1175 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-20 21:05:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 6399 transitions. [2022-03-20 21:05:29,833 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 6399 transitions. Word has length 137 [2022-03-20 21:05:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:29,833 INFO L478 AbstractCegarLoop]: Abstraction has 4849 states and 6399 transitions. [2022-03-20 21:05:29,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 6399 transitions. [2022-03-20 21:05:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 21:05:29,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:29,835 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:05:29,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 21:05:30,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:30,036 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:30,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 11 times [2022-03-20 21:05:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:30,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086401366] [2022-03-20 21:05:30,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 12 times [2022-03-20 21:05:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:30,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131533243] [2022-03-20 21:05:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:30,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:30,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589248924] [2022-03-20 21:05:30,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:30,044 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 21:05:30,046 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 21:05:31,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-20 21:05:31,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:05:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:05:31,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 137 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:05:32,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131533243] [2022-03-20 21:05:32,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589248924] [2022-03-20 21:05:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589248924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:32,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 21:05:32,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086401366] [2022-03-20 21:05:32,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086401366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:32,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:32,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:05:32,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962442075] [2022-03-20 21:05:32,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:32,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:05:32,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:32,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:05:32,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:05:32,286 INFO L87 Difference]: Start difference. First operand 4849 states and 6399 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:34,044 INFO L93 Difference]: Finished difference Result 6374 states and 8659 transitions. [2022-03-20 21:05:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 21:05:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 138 [2022-03-20 21:05:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:34,053 INFO L225 Difference]: With dead ends: 6374 [2022-03-20 21:05:34,053 INFO L226 Difference]: Without dead ends: 5677 [2022-03-20 21:05:34,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=996, Invalid=1356, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 21:05:34,055 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 383 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:34,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 478 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:05:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-03-20 21:05:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5354. [2022-03-20 21:05:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 3516 states have (on average 1.2070534698521047) internal successors, (4244), 3577 states have internal predecessors, (4244), 1435 states have call successors, (1435), 403 states have call predecessors, (1435), 402 states have return successors, (1427), 1373 states have call predecessors, (1427), 1427 states have call successors, (1427) [2022-03-20 21:05:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 7106 transitions. [2022-03-20 21:05:35,358 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 7106 transitions. Word has length 138 [2022-03-20 21:05:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:35,358 INFO L478 AbstractCegarLoop]: Abstraction has 5354 states and 7106 transitions. [2022-03-20 21:05:35,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:05:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 7106 transitions. [2022-03-20 21:05:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 21:05:35,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:35,360 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 21:05:35,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 21:05:35,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:35,561 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 29 times [2022-03-20 21:05:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:35,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082504859] [2022-03-20 21:05:35,562 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 30 times [2022-03-20 21:05:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:35,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150507981] [2022-03-20 21:05:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:35,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:35,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259589329] [2022-03-20 21:05:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:05:35,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:35,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:35,569 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 21:05:35,569 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 21:05:35,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:05:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 21:05:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:05:37,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:05:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150507981] [2022-03-20 21:05:45,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259589329] [2022-03-20 21:05:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259589329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:05:45,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:05:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2022-03-20 21:05:45,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082504859] [2022-03-20 21:05:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082504859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:45,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:45,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:05:45,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275164156] [2022-03-20 21:05:45,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:45,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:05:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:05:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:05:45,447 INFO L87 Difference]: Start difference. First operand 5354 states and 7106 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:05:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:05:48,125 INFO L93 Difference]: Finished difference Result 5542 states and 7333 transitions. [2022-03-20 21:05:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 21:05:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 142 [2022-03-20 21:05:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:05:48,135 INFO L225 Difference]: With dead ends: 5542 [2022-03-20 21:05:48,136 INFO L226 Difference]: Without dead ends: 5535 [2022-03-20 21:05:48,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:05:48,137 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 137 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 21:05:48,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 806 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 21:05:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-20 21:05:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5392. [2022-03-20 21:05:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 3543 states have (on average 1.2054755856618684) internal successors, (4271), 3604 states have internal predecessors, (4271), 1437 states have call successors, (1437), 412 states have call predecessors, (1437), 411 states have return successors, (1429), 1375 states have call predecessors, (1429), 1429 states have call successors, (1429) [2022-03-20 21:05:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7137 transitions. [2022-03-20 21:05:49,542 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7137 transitions. Word has length 142 [2022-03-20 21:05:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:05:49,542 INFO L478 AbstractCegarLoop]: Abstraction has 5392 states and 7137 transitions. [2022-03-20 21:05:49,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:05:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7137 transitions. [2022-03-20 21:05:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 21:05:49,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:05:49,545 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 21:05:49,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 21:05:49,745 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,SelfDestructingSolverStorable63 [2022-03-20 21:05:49,745 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:05:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:05:49,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 31 times [2022-03-20 21:05:49,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [62898569] [2022-03-20 21:05:49,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:05:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 32 times [2022-03-20 21:05:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:05:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598218704] [2022-03-20 21:05:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:05:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:05:49,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:05:49,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045772747] [2022-03-20 21:05:49,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:05:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:05:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:05:49,752 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 21:05:49,753 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 21:05:49,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:05:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:05:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 21:05:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:05:52,291 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:05:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 130 proven. 140 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:05:52,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:05:53,328 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:05:55,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:05:55,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598218704] [2022-03-20 21:05:55,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:05:55,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045772747] [2022-03-20 21:05:55,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045772747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:05:55,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:05:55,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 21:05:55,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:05:55,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [62898569] [2022-03-20 21:05:55,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [62898569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:05:55,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:05:55,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:05:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376771139] [2022-03-20 21:05:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:05:55,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:05:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:05:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:05:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:05:55,469 INFO L87 Difference]: Start difference. First operand 5392 states and 7137 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:01,058 INFO L93 Difference]: Finished difference Result 5613 states and 7408 transitions. [2022-03-20 21:06:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:06:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-20 21:06:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:01,068 INFO L225 Difference]: With dead ends: 5613 [2022-03-20 21:06:01,068 INFO L226 Difference]: Without dead ends: 5610 [2022-03-20 21:06:01,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:06:01,069 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 132 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:01,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1437 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 21:06:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5610 states. [2022-03-20 21:06:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5610 to 5524. [2022-03-20 21:06:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 3629 states have (on average 1.205566271700193) internal successors, (4375), 3691 states have internal predecessors, (4375), 1467 states have call successors, (1467), 428 states have call predecessors, (1467), 427 states have return successors, (1459), 1404 states have call predecessors, (1459), 1459 states have call successors, (1459) [2022-03-20 21:06:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7301 transitions. [2022-03-20 21:06:02,489 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7301 transitions. Word has length 145 [2022-03-20 21:06:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:02,489 INFO L478 AbstractCegarLoop]: Abstraction has 5524 states and 7301 transitions. [2022-03-20 21:06:02,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7301 transitions. [2022-03-20 21:06:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 21:06:02,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:02,492 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 21:06:02,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 21:06:02,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:02,693 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 33 times [2022-03-20 21:06:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:02,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689012481] [2022-03-20 21:06:02,693 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 34 times [2022-03-20 21:06:02,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:02,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034673497] [2022-03-20 21:06:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:02,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:02,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:02,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638870408] [2022-03-20 21:06:02,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:06:02,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:02,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:02,700 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 21:06:02,701 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 21:06:02,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:06:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:02,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 21:06:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:03,667 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:03,675 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:03,687 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 140 proven. 103 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 21:06:08,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 198 proven. 19 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-20 21:06:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:11,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034673497] [2022-03-20 21:06:11,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638870408] [2022-03-20 21:06:11,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638870408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:11,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:11,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 36 [2022-03-20 21:06:11,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689012481] [2022-03-20 21:06:11,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689012481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:11,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:11,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:06:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126405472] [2022-03-20 21:06:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:11,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:06:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:06:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:06:11,407 INFO L87 Difference]: Start difference. First operand 5524 states and 7301 transitions. Second operand has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:15,687 INFO L93 Difference]: Finished difference Result 5648 states and 7477 transitions. [2022-03-20 21:06:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:06:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-20 21:06:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:15,700 INFO L225 Difference]: With dead ends: 5648 [2022-03-20 21:06:15,701 INFO L226 Difference]: Without dead ends: 5641 [2022-03-20 21:06:15,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:06:15,702 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 109 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:15,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1588 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 792 Invalid, 0 Unknown, 475 Unchecked, 1.0s Time] [2022-03-20 21:06:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2022-03-20 21:06:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 5524. [2022-03-20 21:06:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 3629 states have (on average 1.205566271700193) internal successors, (4375), 3691 states have internal predecessors, (4375), 1467 states have call successors, (1467), 428 states have call predecessors, (1467), 427 states have return successors, (1459), 1404 states have call predecessors, (1459), 1459 states have call successors, (1459) [2022-03-20 21:06:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7301 transitions. [2022-03-20 21:06:17,129 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7301 transitions. Word has length 145 [2022-03-20 21:06:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:17,129 INFO L478 AbstractCegarLoop]: Abstraction has 5524 states and 7301 transitions. [2022-03-20 21:06:17,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:06:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7301 transitions. [2022-03-20 21:06:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 21:06:17,131 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:17,131 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:17,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 21:06:17,333 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,SelfDestructingSolverStorable65 [2022-03-20 21:06:17,333 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 11 times [2022-03-20 21:06:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:17,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351891615] [2022-03-20 21:06:17,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 12 times [2022-03-20 21:06:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:17,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56904598] [2022-03-20 21:06:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:17,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:17,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797094457] [2022-03-20 21:06:17,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:17,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:17,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:17,339 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 21:06:17,340 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 21:06:17,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 21:06:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 21:06:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-20 21:06:17,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:19,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56904598] [2022-03-20 21:06:19,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797094457] [2022-03-20 21:06:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797094457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:19,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:19,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 21:06:19,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351891615] [2022-03-20 21:06:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351891615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:19,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:19,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:06:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236074635] [2022-03-20 21:06:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:19,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:06:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:06:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:06:19,200 INFO L87 Difference]: Start difference. First operand 5524 states and 7301 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 21:06:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:21,547 INFO L93 Difference]: Finished difference Result 6278 states and 8388 transitions. [2022-03-20 21:06:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:06:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 143 [2022-03-20 21:06:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:21,559 INFO L225 Difference]: With dead ends: 6278 [2022-03-20 21:06:21,559 INFO L226 Difference]: Without dead ends: 6276 [2022-03-20 21:06:21,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:06:21,560 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 155 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:21,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 396 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 21:06:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2022-03-20 21:06:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 6157. [2022-03-20 21:06:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6157 states, 4136 states have (on average 1.2333172147001934) internal successors, (5101), 4218 states have internal predecessors, (5101), 1584 states have call successors, (1584), 437 states have call predecessors, (1584), 436 states have return successors, (1576), 1501 states have call predecessors, (1576), 1576 states have call successors, (1576) [2022-03-20 21:06:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8261 transitions. [2022-03-20 21:06:23,137 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8261 transitions. Word has length 143 [2022-03-20 21:06:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:23,137 INFO L478 AbstractCegarLoop]: Abstraction has 6157 states and 8261 transitions. [2022-03-20 21:06:23,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 21:06:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8261 transitions. [2022-03-20 21:06:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 21:06:23,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:23,140 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:23,156 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 21:06:23,340 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,SelfDestructingSolverStorable66 [2022-03-20 21:06:23,340 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 13 times [2022-03-20 21:06:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675035629] [2022-03-20 21:06:23,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 14 times [2022-03-20 21:06:23,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:23,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647066425] [2022-03-20 21:06:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:23,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:23,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494643694] [2022-03-20 21:06:23,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:06:23,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:23,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:23,349 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 21:06:23,349 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 21:06:23,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:06:23,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:23,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:06:23,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-20 21:06:23,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 150 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:06:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647066425] [2022-03-20 21:06:24,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494643694] [2022-03-20 21:06:24,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494643694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:06:24,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:06:24,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 21:06:24,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675035629] [2022-03-20 21:06:24,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675035629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:24,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:24,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:06:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337424012] [2022-03-20 21:06:24,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:24,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:06:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:06:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:06:24,329 INFO L87 Difference]: Start difference. First operand 6157 states and 8261 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:06:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:06:26,743 INFO L93 Difference]: Finished difference Result 9192 states and 12851 transitions. [2022-03-20 21:06:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 21:06:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 144 [2022-03-20 21:06:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:06:26,759 INFO L225 Difference]: With dead ends: 9192 [2022-03-20 21:06:26,759 INFO L226 Difference]: Without dead ends: 7317 [2022-03-20 21:06:26,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1125, Invalid=1527, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:06:26,764 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 436 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:06:26,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 504 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:06:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states. [2022-03-20 21:06:28,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7317 to 7200. [2022-03-20 21:06:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 4862 states have (on average 1.222953517071164) internal successors, (5946), 4954 states have internal predecessors, (5946), 1850 states have call successors, (1850), 488 states have call predecessors, (1850), 487 states have return successors, (1841), 1757 states have call predecessors, (1841), 1841 states have call successors, (1841) [2022-03-20 21:06:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 9637 transitions. [2022-03-20 21:06:28,738 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 9637 transitions. Word has length 144 [2022-03-20 21:06:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:06:28,738 INFO L478 AbstractCegarLoop]: Abstraction has 7200 states and 9637 transitions. [2022-03-20 21:06:28,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 21:06:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 9637 transitions. [2022-03-20 21:06:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:06:28,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:06:28,741 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:06:28,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-20 21:06:28,941 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,SelfDestructingSolverStorable67 [2022-03-20 21:06:28,941 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:06:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:06:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 35 times [2022-03-20 21:06:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:28,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975797990] [2022-03-20 21:06:28,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:06:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 36 times [2022-03-20 21:06:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:06:28,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089610289] [2022-03-20 21:06:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:06:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:06:28,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:06:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352497952] [2022-03-20 21:06:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:06:28,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:06:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:06:28,948 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 21:06:28,948 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 21:06:29,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 21:06:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:06:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-20 21:06:29,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:06:47,411 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 46 proven. 142 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-20 21:06:47,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:06:53,767 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:53,854 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:54,420 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:54,589 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:54,734 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:54,836 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:55,018 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:57,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:58,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:58,308 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:58,680 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:06:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:06:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089610289] [2022-03-20 21:06:58,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:06:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352497952] [2022-03-20 21:06:58,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352497952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:06:58,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:06:58,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 21:06:58,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:06:58,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975797990] [2022-03-20 21:06:58,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975797990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:06:58,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:06:58,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:06:58,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857598572] [2022-03-20 21:06:58,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:06:58,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:06:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:06:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:06:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:06:58,902 INFO L87 Difference]: Start difference. First operand 7200 states and 9637 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:07:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:03,179 INFO L93 Difference]: Finished difference Result 7261 states and 9706 transitions. [2022-03-20 21:07:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:07:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2022-03-20 21:07:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:03,192 INFO L225 Difference]: With dead ends: 7261 [2022-03-20 21:07:03,193 INFO L226 Difference]: Without dead ends: 7254 [2022-03-20 21:07:03,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 21:07:03,194 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 85 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:03,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1334 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 439 Invalid, 0 Unknown, 654 Unchecked, 1.1s Time] [2022-03-20 21:07:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2022-03-20 21:07:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 7210. [2022-03-20 21:07:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7210 states, 4871 states have (on average 1.2225415725723672) internal successors, (5955), 4962 states have internal predecessors, (5955), 1851 states have call successors, (1851), 488 states have call predecessors, (1851), 487 states have return successors, (1842), 1759 states have call predecessors, (1842), 1842 states have call successors, (1842) [2022-03-20 21:07:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7210 states to 7210 states and 9648 transitions. [2022-03-20 21:07:05,177 INFO L78 Accepts]: Start accepts. Automaton has 7210 states and 9648 transitions. Word has length 149 [2022-03-20 21:07:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:05,177 INFO L478 AbstractCegarLoop]: Abstraction has 7210 states and 9648 transitions. [2022-03-20 21:07:05,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:07:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7210 states and 9648 transitions. [2022-03-20 21:07:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:07:05,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:05,180 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:05,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 21:07:05,380 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,SelfDestructingSolverStorable68 [2022-03-20 21:07:05,380 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 37 times [2022-03-20 21:07:05,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:05,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397529704] [2022-03-20 21:07:05,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 38 times [2022-03-20 21:07:05,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:05,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914811818] [2022-03-20 21:07:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:05,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989508740] [2022-03-20 21:07:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:07:05,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:05,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:05,386 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 21:07:05,387 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 21:07:05,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:07:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 21:07:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 97 proven. 190 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-20 21:07:09,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:07:13,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:07:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914811818] [2022-03-20 21:07:13,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:07:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989508740] [2022-03-20 21:07:13,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989508740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 21:07:13,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 21:07:13,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 21:07:13,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:07:13,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397529704] [2022-03-20 21:07:13,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397529704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:07:13,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:07:13,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:07:13,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94204721] [2022-03-20 21:07:13,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:07:13,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:07:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:07:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:07:13,882 INFO L87 Difference]: Start difference. First operand 7210 states and 9648 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:07:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:07:24,030 INFO L93 Difference]: Finished difference Result 7399 states and 9890 transitions. [2022-03-20 21:07:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 21:07:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 149 [2022-03-20 21:07:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:07:24,043 INFO L225 Difference]: With dead ends: 7399 [2022-03-20 21:07:24,043 INFO L226 Difference]: Without dead ends: 7396 [2022-03-20 21:07:24,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:07:24,044 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 138 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 21:07:24,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1563 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 21:07:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2022-03-20 21:07:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7258. [2022-03-20 21:07:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 4903 states have (on average 1.2214970426269631) internal successors, (5989), 4994 states have internal predecessors, (5989), 1860 states have call successors, (1860), 495 states have call predecessors, (1860), 494 states have return successors, (1851), 1768 states have call predecessors, (1851), 1851 states have call successors, (1851) [2022-03-20 21:07:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 9700 transitions. [2022-03-20 21:07:26,017 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 9700 transitions. Word has length 149 [2022-03-20 21:07:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:07:26,017 INFO L478 AbstractCegarLoop]: Abstraction has 7258 states and 9700 transitions. [2022-03-20 21:07:26,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 21:07:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 9700 transitions. [2022-03-20 21:07:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 21:07:26,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:07:26,020 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:07:26,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-20 21:07:26,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:26,220 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:07:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:07:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 39 times [2022-03-20 21:07:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:07:26,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926900013] [2022-03-20 21:07:26,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:07:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 40 times [2022-03-20 21:07:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:07:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445980399] [2022-03-20 21:07:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:07:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:07:26,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:07:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366168089] [2022-03-20 21:07:26,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:07:26,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:07:26,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:07:26,250 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 21:07:26,252 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 21:07:26,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:07:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:07:26,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 21:07:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:07:33,454 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:33,461 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:46,172 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:46,179 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:07:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 108 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-03-20 21:07:49,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:19,555 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:11,475 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 105 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-20 21:09:15,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445980399] [2022-03-20 21:09:15,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366168089] [2022-03-20 21:09:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366168089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:15,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:15,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2022-03-20 21:09:15,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926900013] [2022-03-20 21:09:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926900013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:15,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:09:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864078023] [2022-03-20 21:09:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:15,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:09:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:09:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:09:15,466 INFO L87 Difference]: Start difference. First operand 7258 states and 9700 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 21:09:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:23,555 INFO L93 Difference]: Finished difference Result 7278 states and 9720 transitions. [2022-03-20 21:09:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:09:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) Word has length 154 [2022-03-20 21:09:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:23,568 INFO L225 Difference]: With dead ends: 7278 [2022-03-20 21:09:23,568 INFO L226 Difference]: Without dead ends: 7271 [2022-03-20 21:09:23,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=403, Invalid=1853, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:09:23,570 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 86 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:23,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 818 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 885 Invalid, 0 Unknown, 387 Unchecked, 2.6s Time] [2022-03-20 21:09:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2022-03-20 21:09:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7262. [2022-03-20 21:09:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7262 states, 4907 states have (on average 1.221316486651722) internal successors, (5993), 4998 states have internal predecessors, (5993), 1860 states have call successors, (1860), 495 states have call predecessors, (1860), 494 states have return successors, (1851), 1768 states have call predecessors, (1851), 1851 states have call successors, (1851) [2022-03-20 21:09:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7262 states to 7262 states and 9704 transitions. [2022-03-20 21:09:25,543 INFO L78 Accepts]: Start accepts. Automaton has 7262 states and 9704 transitions. Word has length 154 [2022-03-20 21:09:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:25,543 INFO L478 AbstractCegarLoop]: Abstraction has 7262 states and 9704 transitions. [2022-03-20 21:09:25,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-20 21:09:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7262 states and 9704 transitions. [2022-03-20 21:09:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 21:09:25,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:25,546 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:25,562 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 21:09:25,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:25,746 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 41 times [2022-03-20 21:09:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:25,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897685402] [2022-03-20 21:09:25,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:25,747 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 42 times [2022-03-20 21:09:25,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:25,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526903248] [2022-03-20 21:09:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:25,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037817117] [2022-03-20 21:09:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:25,753 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 21:09:25,754 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 21:09:25,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 21:09:25,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 21:09:25,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:52,708 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:52,713 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:09:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 99 proven. 170 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-20 21:09:58,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:10:06,043 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 21:10:44,459 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~p~0 c_main_~x~0)) (.cse3 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* (- 1) c_main_~b~0)) (.cse1 (* (- 1) c_main_~b~0 c_main_~k~0)) (.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse5 (* c_main_~s~0 c_main_~y~0))) (or (not (= (mod (div (+ .cse0 (* (* c_main_~b~0 c_main_~k~0) (- 1)) c_main_~a~0) 2) c_main_~b~0) 0)) (not (= (mod (+ c_main_~b~0 c_main_~a~0 .cse1) 2) 0)) (not (= (+ .cse2 .cse3) c_main_~a~0)) (<= (* (div (+ .cse0 c_main_~c~0) 2) 4) c_main_~c~0) (not (= (mod (+ c_main_~b~0 c_main_~c~0) 2) 0)) (= (+ c_main_~b~0 .cse2 .cse3) (let ((.cse6 (div (div (+ .cse0 c_main_~a~0 .cse1) 2) c_main_~b~0))) (+ (* .cse4 2) (* 2 .cse5) (* 2 (* c_main_~q~0 .cse6 c_main_~x~0)) (* c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (* .cse6 c_main_~s~0 c_main_~y~0) 2) (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (not (= c_main_~b~0 (+ .cse4 .cse5))) (<= c_main_~b~0 0))) is different from true [2022-03-20 21:11:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 100 proven. 155 refuted. 0 times theorem prover too weak. 624 trivial. 8 not checked. [2022-03-20 21:11:14,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:11:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526903248] [2022-03-20 21:11:14,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:11:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037817117] [2022-03-20 21:11:14,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037817117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:11:14,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:11:14,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-20 21:11:14,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:11:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897685402] [2022-03-20 21:11:14,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897685402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:11:14,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:11:14,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:11:14,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63771354] [2022-03-20 21:11:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:11:14,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:11:14,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:11:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=712, Unknown=5, NotChecked=56, Total=930 [2022-03-20 21:11:14,526 INFO L87 Difference]: Start difference. First operand 7262 states and 9704 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:11:18,055 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 21:11:29,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:11:33,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:11:39,587 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 21:11:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:11:39,645 INFO L93 Difference]: Finished difference Result 7891 states and 10550 transitions. [2022-03-20 21:11:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:11:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 154 [2022-03-20 21:11:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:11:39,662 INFO L225 Difference]: With dead ends: 7891 [2022-03-20 21:11:39,662 INFO L226 Difference]: Without dead ends: 7873 [2022-03-20 21:11:39,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=226, Invalid=1033, Unknown=5, NotChecked=68, Total=1332 [2022-03-20 21:11:39,665 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 76 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 45 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:11:39,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 792 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 784 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2022-03-20 21:11:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7873 states. [2022-03-20 21:11:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7873 to 7633. [2022-03-20 21:11:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7633 states, 5167 states have (on average 1.21830849622605) internal successors, (6295), 5257 states have internal predecessors, (6295), 1942 states have call successors, (1942), 524 states have call predecessors, (1942), 523 states have return successors, (1934), 1851 states have call predecessors, (1934), 1934 states have call successors, (1934) [2022-03-20 21:11:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 10171 transitions. [2022-03-20 21:11:41,925 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 10171 transitions. Word has length 154 [2022-03-20 21:11:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:11:41,926 INFO L478 AbstractCegarLoop]: Abstraction has 7633 states and 10171 transitions. [2022-03-20 21:11:41,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 21:11:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 10171 transitions. [2022-03-20 21:11:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 21:11:41,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:11:41,929 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 21:11:41,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 21:11:42,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:42,129 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:11:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:11:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 3 times [2022-03-20 21:11:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:42,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480502356] [2022-03-20 21:11:42,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:11:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash 40584978, now seen corresponding path program 4 times [2022-03-20 21:11:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:11:42,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933818154] [2022-03-20 21:11:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:11:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:11:42,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:11:42,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232219429] [2022-03-20 21:11:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:11:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:11:42,136 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 21:11:42,136 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 21:11:42,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:11:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:11:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 21:11:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:11:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-20 21:11:43,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:11:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 93 proven. 20 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-20 21:11:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:11:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933818154] [2022-03-20 21:11:45,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:11:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232219429] [2022-03-20 21:11:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232219429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:11:45,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:11:45,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 21:11:45,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:11:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480502356] [2022-03-20 21:11:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480502356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:11:45,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:11:45,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:11:45,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692918652] [2022-03-20 21:11:45,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:11:45,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:11:45,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:11:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:11:45,173 INFO L87 Difference]: Start difference. First operand 7633 states and 10171 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:11:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:11:48,106 INFO L93 Difference]: Finished difference Result 7887 states and 10476 transitions. [2022-03-20 21:11:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:11:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 153 [2022-03-20 21:11:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:11:48,123 INFO L225 Difference]: With dead ends: 7887 [2022-03-20 21:11:48,123 INFO L226 Difference]: Without dead ends: 7885 [2022-03-20 21:11:48,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-20 21:11:48,126 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 21:11:48,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 349 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 21:11:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2022-03-20 21:11:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 7779. [2022-03-20 21:11:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7779 states, 5275 states have (on average 1.2193364928909953) internal successors, (6432), 5375 states have internal predecessors, (6432), 1966 states have call successors, (1966), 538 states have call predecessors, (1966), 537 states have return successors, (1958), 1865 states have call predecessors, (1958), 1958 states have call successors, (1958) [2022-03-20 21:11:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7779 states to 7779 states and 10356 transitions. [2022-03-20 21:11:50,459 INFO L78 Accepts]: Start accepts. Automaton has 7779 states and 10356 transitions. Word has length 153 [2022-03-20 21:11:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:11:50,460 INFO L478 AbstractCegarLoop]: Abstraction has 7779 states and 10356 transitions. [2022-03-20 21:11:50,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-20 21:11:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7779 states and 10356 transitions. [2022-03-20 21:11:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 21:11:50,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:11:50,463 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2022-03-20 21:11:50,499 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 21:11:50,663 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,SelfDestructingSolverStorable72 [2022-03-20 21:11:50,664 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:11:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:11:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 43 times [2022-03-20 21:11:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:11:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725541498] [2022-03-20 21:11:50,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:11:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 808456558, now seen corresponding path program 44 times [2022-03-20 21:11:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:11:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257928210] [2022-03-20 21:11:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:11:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:11:50,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:11:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070874454] [2022-03-20 21:11:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:11:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:11:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:11:50,670 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 21:11:50,671 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 21:11:50,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:11:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:11:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 21:11:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates...