/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/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:31:56,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:31:56,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:31:56,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:31:56,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:31:56,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:31:56,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:31:56,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 22:31:56,179 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:31:56,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:31:56,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:31:56,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:31:56,181 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:31:56,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:31:56,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:31:56,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:31:56,183 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:31:56,183 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:31:56,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:31:56,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:31:56,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:31:56,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:31:56,411 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:31:56,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-04-06 22:31:56,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d2e50080/e13fd0eb771f42f087aa67da3526c722/FLAGd871eca9b [2022-04-06 22:31:56,858 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:31:56,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-04-06 22:31:56,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d2e50080/e13fd0eb771f42f087aa67da3526c722/FLAGd871eca9b [2022-04-06 22:31:56,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d2e50080/e13fd0eb771f42f087aa67da3526c722 [2022-04-06 22:31:56,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:31:56,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:31:56,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:31:56,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:31:56,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:31:56,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:31:56" (1/1) ... [2022-04-06 22:31:56,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4722a509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:56, skipping insertion in model container [2022-04-06 22:31:56,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:31:56" (1/1) ... [2022-04-06 22:31:56,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:31:56,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:31:57,027 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/egcd2-ll_unwindbound20.c[490,503] [2022-04-06 22:31:57,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:31:57,066 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:31:57,075 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/egcd2-ll_unwindbound20.c[490,503] [2022-04-06 22:31:57,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:31:57,105 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:31:57,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57 WrapperNode [2022-04-06 22:31:57,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:31:57,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:31:57,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:31:57,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:31:57,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:31:57,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:31:57,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:31:57,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:31:57,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (1/1) ... [2022-04-06 22:31:57,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:31:57,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:57,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 22:31:57,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 22:31:57,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:31:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:31:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:31:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:31:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:31:57,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:31:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:31:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:31:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:31:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:31:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:31:57,278 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:31:57,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:31:57,390 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:31:57,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:31:57,395 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 22:31:57,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:31:57 BoogieIcfgContainer [2022-04-06 22:31:57,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:31:57,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:31:57,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:31:57,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:31:57,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:31:56" (1/3) ... [2022-04-06 22:31:57,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1c63de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:31:57, skipping insertion in model container [2022-04-06 22:31:57,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:31:57" (2/3) ... [2022-04-06 22:31:57,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1c63de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:31:57, skipping insertion in model container [2022-04-06 22:31:57,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:31:57" (3/3) ... [2022-04-06 22:31:57,402 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-04-06 22:31:57,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:31:57,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:31:57,458 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:31:57,462 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 22:31:57,463 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:31:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 22:31:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 22:31:57,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:57,503 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:57,504 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-04-06 22:31:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:57,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1084087181] [2022-04-06 22:31:57,525 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times [2022-04-06 22:31:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:57,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411181000] [2022-04-06 22:31:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:31:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:31:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 22:31:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 22:31:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 22:31:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:31:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:31:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411181000] [2022-04-06 22:31:57,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411181000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:57,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:57,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:31:57,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1084087181] [2022-04-06 22:31:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1084087181] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:57,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:57,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:31:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269725995] [2022-04-06 22:31:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:57,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:31:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:31:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:31:57,760 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:57,870 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-04-06 22:31:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:31:57,872 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 22:31:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:57,876 INFO L225 Difference]: With dead ends: 72 [2022-04-06 22:31:57,877 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 22:31:57,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:31:57,881 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:57,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:31:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 22:31:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 22:31:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:31:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 22:31:57,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-04-06 22:31:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:57,916 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 22:31:57,917 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 22:31:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:31:57,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:57,919 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:57,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:31:57,920 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-04-06 22:31:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860110175] [2022-04-06 22:31:57,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times [2022-04-06 22:31:57,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024804179] [2022-04-06 22:31:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:57,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408427334] [2022-04-06 22:31:57,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:57,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:57,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:57,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:57,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 22:31:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:31:58,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:31:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:31:58,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:31:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024804179] [2022-04-06 22:31:58,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408427334] [2022-04-06 22:31:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408427334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:58,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:58,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:31:58,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:58,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860110175] [2022-04-06 22:31:58,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860110175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:58,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:58,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 22:31:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453271583] [2022-04-06 22:31:58,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:58,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 22:31:58,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 22:31:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:31:58,177 INFO L87 Difference]: Start difference. First operand 34 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:58,202 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-04-06 22:31:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 22:31:58,203 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 22:31:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:58,205 INFO L225 Difference]: With dead ends: 44 [2022-04-06 22:31:58,205 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 22:31:58,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 22:31:58,206 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:58,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:31:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 22:31:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 22:31:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:31:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-04-06 22:31:58,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-04-06 22:31:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:58,213 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-04-06 22:31:58,213 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-04-06 22:31:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 22:31:58,214 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:58,214 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:58,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 22:31:58,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:58,436 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-04-06 22:31:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:58,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951272332] [2022-04-06 22:31:58,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times [2022-04-06 22:31:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564672812] [2022-04-06 22:31:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:58,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:58,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111877206] [2022-04-06 22:31:58,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:58,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:58,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 22:31:58,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:31:58,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:31:58,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:31:58,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:31:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:31:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564672812] [2022-04-06 22:31:58,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111877206] [2022-04-06 22:31:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111877206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:31:58,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:31:58,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 22:31:58,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:58,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951272332] [2022-04-06 22:31:58,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951272332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:58,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:58,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:31:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230679160] [2022-04-06 22:31:58,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:58,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:31:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:31:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:31:58,677 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2022-04-06 22:31:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:58,733 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-04-06 22:31:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:31:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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 34 [2022-04-06 22:31:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:58,734 INFO L225 Difference]: With dead ends: 53 [2022-04-06 22:31:58,734 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 22:31:58,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:31:58,735 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:58,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 135 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:31:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 22:31:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-04-06 22:31:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 22:31:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 22:31:58,741 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-04-06 22:31:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:58,741 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 22:31:58,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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) [2022-04-06 22:31:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 22:31:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 22:31:58,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:58,742 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:58,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 22:31:58,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 22:31:58,968 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-04-06 22:31:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:58,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599898366] [2022-04-06 22:31:58,969 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times [2022-04-06 22:31:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:58,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416377323] [2022-04-06 22:31:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:58,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66898479] [2022-04-06 22:31:58,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:58,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:58,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 22:31:59,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:31:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 22:31:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:31:59,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:31:59,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416377323] [2022-04-06 22:31:59,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66898479] [2022-04-06 22:31:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66898479] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:59,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:59,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:31:59,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599898366] [2022-04-06 22:31:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599898366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:59,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:59,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:31:59,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702272516] [2022-04-06 22:31:59,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:59,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:31:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:31:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:31:59,086 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:31:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:59,116 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-04-06 22:31:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:31:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-04-06 22:31:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:59,117 INFO L225 Difference]: With dead ends: 51 [2022-04-06 22:31:59,117 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 22:31:59,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:31:59,118 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:59,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:31:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 22:31:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-04-06 22:31:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:31:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-04-06 22:31:59,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2022-04-06 22:31:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:59,140 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-04-06 22:31:59,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:31:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-04-06 22:31:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 22:31:59,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:59,141 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 22:31:59,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 22:31:59,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:59,357 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-04-06 22:31:59,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:59,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364138824] [2022-04-06 22:31:59,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:59,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times [2022-04-06 22:31:59,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:59,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440611964] [2022-04-06 22:31:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:59,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:59,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:59,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619352238] [2022-04-06 22:31:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:59,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:59,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 22:31:59,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:31:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:31:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:31:59,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:31:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:31:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440611964] [2022-04-06 22:31:59,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:31:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619352238] [2022-04-06 22:31:59,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619352238] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:59,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:59,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:31:59,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:31:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364138824] [2022-04-06 22:31:59,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364138824] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:31:59,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:31:59,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:31:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264404963] [2022-04-06 22:31:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:31:59,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:31:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:31:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:31:59,522 INFO L87 Difference]: Start difference. First operand 44 states and 56 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:31:59,543 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-04-06 22:31:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:31:59,544 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 22:31:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:31:59,545 INFO L225 Difference]: With dead ends: 72 [2022-04-06 22:31:59,545 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 22:31:59,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:31:59,546 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:31:59,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:31:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 22:31:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 22:31:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:31:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-04-06 22:31:59,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39 [2022-04-06 22:31:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:31:59,552 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-04-06 22:31:59,552 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:31:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-04-06 22:31:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 22:31:59,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:31:59,553 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:31:59,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 22:31:59,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:59,769 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:31:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:31:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-04-06 22:31:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:31:59,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [32125717] [2022-04-06 22:31:59,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:31:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times [2022-04-06 22:31:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:31:59,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629337829] [2022-04-06 22:31:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:31:59,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:31:59,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:31:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369246355] [2022-04-06 22:31:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:31:59,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:31:59,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:31:59,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:31:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 22:31:59,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:31:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:31:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:31:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:31:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 22:31:59,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:32:00,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629337829] [2022-04-06 22:32:00,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369246355] [2022-04-06 22:32:00,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369246355] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:32:00,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:00,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [32125717] [2022-04-06 22:32:00,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [32125717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:00,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:00,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586706113] [2022-04-06 22:32:00,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:00,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:00,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:00,081 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:32:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:00,136 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-04-06 22:32:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-04-06 22:32:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:00,138 INFO L225 Difference]: With dead ends: 61 [2022-04-06 22:32:00,138 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 22:32:00,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:00,139 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:00,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 22:32:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 22:32:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-04-06 22:32:00,147 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41 [2022-04-06 22:32:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:00,147 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-04-06 22:32:00,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:32:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-04-06 22:32:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 22:32:00,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:00,167 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:00,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:00,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:00,368 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:00,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-04-06 22:32:00,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:00,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879609885] [2022-04-06 22:32:00,369 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times [2022-04-06 22:32:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:00,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872118095] [2022-04-06 22:32:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:00,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:00,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147688878] [2022-04-06 22:32:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:00,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:00,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:00,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 22:32:00,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 22:32:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 22:32:00,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:32:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872118095] [2022-04-06 22:32:00,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147688878] [2022-04-06 22:32:00,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147688878] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:00,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:00,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 22:32:00,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:00,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879609885] [2022-04-06 22:32:00,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879609885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:00,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:00,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692992713] [2022-04-06 22:32:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:00,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:00,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:00,756 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-04-06 22:32:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:00,812 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-04-06 22:32:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:32:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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 46 [2022-04-06 22:32:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:00,813 INFO L225 Difference]: With dead ends: 65 [2022-04-06 22:32:00,813 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 22:32:00,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:00,814 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:00,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 148 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 22:32:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 22:32:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-04-06 22:32:00,822 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46 [2022-04-06 22:32:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:00,822 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-04-06 22:32:00,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (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) [2022-04-06 22:32:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-04-06 22:32:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 22:32:00,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:00,823 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:00,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:01,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:01,023 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-04-06 22:32:01,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310572808] [2022-04-06 22:32:01,024 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times [2022-04-06 22:32:01,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:01,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911448887] [2022-04-06 22:32:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:01,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:01,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745501] [2022-04-06 22:32:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:01,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:01,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 22:32:01,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:32:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 22:32:01,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911448887] [2022-04-06 22:32:01,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745501] [2022-04-06 22:32:01,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745501] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:01,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:01,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 22:32:01,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310572808] [2022-04-06 22:32:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310572808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:01,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:01,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407331884] [2022-04-06 22:32:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:01,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:01,377 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:01,482 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-04-06 22:32:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 22:32:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:01,483 INFO L225 Difference]: With dead ends: 69 [2022-04-06 22:32:01,483 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 22:32:01,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:01,484 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:01,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 160 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 22:32:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 22:32:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 22:32:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-04-06 22:32:01,494 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51 [2022-04-06 22:32:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:01,494 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-04-06 22:32:01,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:32:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-04-06 22:32:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 22:32:01,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:01,495 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:01,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:01,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:01,713 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2022-04-06 22:32:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:01,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684457073] [2022-04-06 22:32:01,714 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:01,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times [2022-04-06 22:32:01,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:01,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689109963] [2022-04-06 22:32:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:01,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:01,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842454795] [2022-04-06 22:32:01,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:01,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:01,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:01,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 22:32:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:01,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689109963] [2022-04-06 22:32:02,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842454795] [2022-04-06 22:32:02,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842454795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:02,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:02,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 22:32:02,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684457073] [2022-04-06 22:32:02,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684457073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:02,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:02,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941188335] [2022-04-06 22:32:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:02,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:02,056 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 22:32:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:02,123 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-04-06 22:32:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2022-04-06 22:32:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:02,125 INFO L225 Difference]: With dead ends: 96 [2022-04-06 22:32:02,125 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 22:32:02,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:02,125 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:02,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 208 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 22:32:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-04-06 22:32:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:32:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-04-06 22:32:02,137 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2022-04-06 22:32:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:02,138 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-04-06 22:32:02,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 22:32:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-04-06 22:32:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 22:32:02,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:02,139 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-04-06 22:32:02,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:02,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 22:32:02,356 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-04-06 22:32:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:02,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806994374] [2022-04-06 22:32:02,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times [2022-04-06 22:32:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554519953] [2022-04-06 22:32:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:02,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:02,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:02,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124685106] [2022-04-06 22:32:02,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:02,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:02,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 22:32:02,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 22:32:02,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:02,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554519953] [2022-04-06 22:32:02,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124685106] [2022-04-06 22:32:02,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124685106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:02,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:02,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 22:32:02,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:02,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806994374] [2022-04-06 22:32:02,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806994374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:02,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:02,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:02,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780862163] [2022-04-06 22:32:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:02,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:02,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:02,639 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:02,682 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-04-06 22:32:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-04-06 22:32:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:02,683 INFO L225 Difference]: With dead ends: 111 [2022-04-06 22:32:02,683 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 22:32:02,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:02,684 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:02,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 22:32:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 22:32:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:32:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-04-06 22:32:02,696 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60 [2022-04-06 22:32:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:02,696 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-04-06 22:32:02,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-04-06 22:32:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:32:02,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:02,697 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-06 22:32:02,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:02,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 22:32:02,903 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-04-06 22:32:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:02,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274841563] [2022-04-06 22:32:02,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times [2022-04-06 22:32:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:02,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765469671] [2022-04-06 22:32:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:02,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:02,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920913862] [2022-04-06 22:32:02,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:02,912 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) [2022-04-06 22:32:02,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 22:32:02,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:02,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:02,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:02,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:32:03,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:32:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765469671] [2022-04-06 22:32:03,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920913862] [2022-04-06 22:32:03,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920913862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:03,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:03,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:32:03,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274841563] [2022-04-06 22:32:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274841563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195610096] [2022-04-06 22:32:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:03,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:32:03,171 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:32:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:03,342 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-04-06 22:32:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-04-06 22:32:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:03,344 INFO L225 Difference]: With dead ends: 182 [2022-04-06 22:32:03,344 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 22:32:03,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:03,344 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:03,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 317 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 22:32:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-04-06 22:32:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 22:32:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2022-04-06 22:32:03,359 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61 [2022-04-06 22:32:03,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:03,359 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2022-04-06 22:32:03,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 22:32:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2022-04-06 22:32:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 22:32:03,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:03,360 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-04-06 22:32:03,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:03,576 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 [2022-04-06 22:32:03,576 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2022-04-06 22:32:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728603374] [2022-04-06 22:32:03,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times [2022-04-06 22:32:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134168130] [2022-04-06 22:32:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:03,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512769801] [2022-04-06 22:32:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:03,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:03,584 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) [2022-04-06 22:32:03,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 22:32:03,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:32:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:03,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134168130] [2022-04-06 22:32:03,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:03,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512769801] [2022-04-06 22:32:03,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512769801] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:03,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:03,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 22:32:03,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728603374] [2022-04-06 22:32:03,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728603374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:03,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:03,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:32:03,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102632400] [2022-04-06 22:32:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:03,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:32:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:32:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:03,859 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:03,904 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-04-06 22:32:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:03,904 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), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-04-06 22:32:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:03,906 INFO L225 Difference]: With dead ends: 183 [2022-04-06 22:32:03,906 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 22:32:03,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:32:03,907 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:03,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 22:32:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 22:32:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 22:32:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-04-06 22:32:03,922 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62 [2022-04-06 22:32:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:03,923 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-04-06 22:32:03,923 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), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-04-06 22:32:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 22:32:03,923 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:03,923 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-04-06 22:32:03,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:04,132 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 [2022-04-06 22:32:04,133 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2022-04-06 22:32:04,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751759759] [2022-04-06 22:32:04,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times [2022-04-06 22:32:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711345253] [2022-04-06 22:32:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:04,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:04,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159103704] [2022-04-06 22:32:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:04,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:04,157 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) [2022-04-06 22:32:04,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 22:32:04,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:04,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:32:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711345253] [2022-04-06 22:32:04,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159103704] [2022-04-06 22:32:04,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159103704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:04,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:04,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 22:32:04,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751759759] [2022-04-06 22:32:04,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751759759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:04,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:04,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:04,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364389091] [2022-04-06 22:32:04,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:04,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:04,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:32:04,449 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:04,524 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions. [2022-04-06 22:32:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-04-06 22:32:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:04,525 INFO L225 Difference]: With dead ends: 253 [2022-04-06 22:32:04,525 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 22:32:04,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:04,526 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:04,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 22:32:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-04-06 22:32:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 22:32:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-04-06 22:32:04,540 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66 [2022-04-06 22:32:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:04,540 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-04-06 22:32:04,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:32:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-04-06 22:32:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 22:32:04,541 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:04,541 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:04,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:04,758 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 [2022-04-06 22:32:04,758 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-04-06 22:32:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:04,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480241048] [2022-04-06 22:32:04,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times [2022-04-06 22:32:04,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:04,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288614248] [2022-04-06 22:32:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:04,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91365280] [2022-04-06 22:32:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:04,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:04,783 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) [2022-04-06 22:32:04,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 22:32:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:04,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 22:32:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:32:05,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 22:32:05,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288614248] [2022-04-06 22:32:05,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:05,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91365280] [2022-04-06 22:32:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91365280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:05,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:05,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 22:32:05,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:05,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480241048] [2022-04-06 22:32:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480241048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:05,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:05,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:32:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388321788] [2022-04-06 22:32:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:05,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:32:05,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:32:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:32:05,160 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:32:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:05,343 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-04-06 22:32:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:32:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-04-06 22:32:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:05,361 INFO L225 Difference]: With dead ends: 195 [2022-04-06 22:32:05,361 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 22:32:05,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:05,361 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:05,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 235 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 22:32:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-04-06 22:32:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2022-04-06 22:32:05,385 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68 [2022-04-06 22:32:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:05,386 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2022-04-06 22:32:05,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 22:32:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2022-04-06 22:32:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 22:32:05,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:05,386 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-04-06 22:32:05,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:05,602 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 [2022-04-06 22:32:05,603 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:05,603 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times [2022-04-06 22:32:05,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:05,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969474885] [2022-04-06 22:32:05,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times [2022-04-06 22:32:05,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:05,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761648841] [2022-04-06 22:32:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:05,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:05,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:05,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568799235] [2022-04-06 22:32:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:05,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:05,611 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) [2022-04-06 22:32:05,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 22:32:05,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:05,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 22:32:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 22:32:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:06,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761648841] [2022-04-06 22:32:06,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568799235] [2022-04-06 22:32:06,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568799235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:06,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:06,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 22:32:06,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:06,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969474885] [2022-04-06 22:32:06,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969474885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:06,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:06,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:32:06,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93003438] [2022-04-06 22:32:06,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:06,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:32:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:32:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:32:06,202 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 22:32:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:06,400 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2022-04-06 22:32:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-04-06 22:32:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:06,402 INFO L225 Difference]: With dead ends: 199 [2022-04-06 22:32:06,402 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 22:32:06,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:32:06,403 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:06,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 267 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 22:32:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-04-06 22:32:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-04-06 22:32:06,419 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73 [2022-04-06 22:32:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:06,419 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-04-06 22:32:06,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 22:32:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-04-06 22:32:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 22:32:06,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:06,420 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-04-06 22:32:06,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:06,637 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 [2022-04-06 22:32:06,637 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times [2022-04-06 22:32:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1367555709] [2022-04-06 22:32:06,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times [2022-04-06 22:32:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339758764] [2022-04-06 22:32:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:06,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:06,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:06,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975586024] [2022-04-06 22:32:06,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:06,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:06,653 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) [2022-04-06 22:32:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 22:32:06,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:06,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:06,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 22:32:06,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 22:32:07,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:07,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:07,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339758764] [2022-04-06 22:32:07,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:07,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975586024] [2022-04-06 22:32:07,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975586024] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:07,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:07,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 22:32:07,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1367555709] [2022-04-06 22:32:07,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1367555709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:07,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:07,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:32:07,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134463565] [2022-04-06 22:32:07,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:07,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:32:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:07,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:32:07,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:32:07,762 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:08,545 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2022-04-06 22:32:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:08,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2022-04-06 22:32:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:08,547 INFO L225 Difference]: With dead ends: 203 [2022-04-06 22:32:08,547 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 22:32:08,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:32:08,548 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:08,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 205 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:32:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 22:32:08,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-04-06 22:32:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 22:32:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-04-06 22:32:08,580 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78 [2022-04-06 22:32:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:08,580 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-04-06 22:32:08,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 22:32:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-04-06 22:32:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 22:32:08,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:08,582 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:08,797 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 [2022-04-06 22:32:08,798 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times [2022-04-06 22:32:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922680449] [2022-04-06 22:32:08,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times [2022-04-06 22:32:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:08,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141542047] [2022-04-06 22:32:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:08,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111379186] [2022-04-06 22:32:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:08,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:08,825 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) [2022-04-06 22:32:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 22:32:08,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:08,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 22:32:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 22:32:09,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 22:32:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141542047] [2022-04-06 22:32:09,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111379186] [2022-04-06 22:32:09,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111379186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:09,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:09,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-04-06 22:32:09,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:09,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922680449] [2022-04-06 22:32:09,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922680449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:09,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:09,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:32:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632283114] [2022-04-06 22:32:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:09,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:32:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:32:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:09,316 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:32:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:09,891 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2022-04-06 22:32:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-04-06 22:32:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:09,893 INFO L225 Difference]: With dead ends: 212 [2022-04-06 22:32:09,893 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 22:32:09,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:32:09,893 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:09,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 248 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:32:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 22:32:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-04-06 22:32:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:32:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-04-06 22:32:09,911 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82 [2022-04-06 22:32:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:09,911 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-04-06 22:32:09,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:32:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-04-06 22:32:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 22:32:09,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:09,912 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:09,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:10,127 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 [2022-04-06 22:32:10,127 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2022-04-06 22:32:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226444887] [2022-04-06 22:32:10,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times [2022-04-06 22:32:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731362576] [2022-04-06 22:32:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:10,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:10,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075957698] [2022-04-06 22:32:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:10,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:10,135 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) [2022-04-06 22:32:10,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 22:32:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:32:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 22:32:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731362576] [2022-04-06 22:32:10,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075957698] [2022-04-06 22:32:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075957698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:10,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:10,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 22:32:10,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226444887] [2022-04-06 22:32:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226444887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:10,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:10,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643563952] [2022-04-06 22:32:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:10,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:32:10,461 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:10,522 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2022-04-06 22:32:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-04-06 22:32:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:10,523 INFO L225 Difference]: With dead ends: 214 [2022-04-06 22:32:10,523 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 22:32:10,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:10,524 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:10,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 22:32:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 22:32:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:32:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-04-06 22:32:10,541 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83 [2022-04-06 22:32:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:10,541 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-04-06 22:32:10,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-04-06 22:32:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 22:32:10,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:10,546 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1] [2022-04-06 22:32:10,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:10,747 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 [2022-04-06 22:32:10,747 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-04-06 22:32:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:10,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655231336] [2022-04-06 22:32:10,748 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times [2022-04-06 22:32:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:10,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062997425] [2022-04-06 22:32:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:10,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:10,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127724669] [2022-04-06 22:32:10,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:10,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:10,760 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) [2022-04-06 22:32:10,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 22:32:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 22:32:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:11,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:11,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062997425] [2022-04-06 22:32:11,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127724669] [2022-04-06 22:32:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127724669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:11,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 22:32:11,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:11,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655231336] [2022-04-06 22:32:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655231336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:11,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625197975] [2022-04-06 22:32:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:11,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:11,514 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:11,753 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-04-06 22:32:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 22:32:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-04-06 22:32:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:11,755 INFO L225 Difference]: With dead ends: 234 [2022-04-06 22:32:11,755 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 22:32:11,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:32:11,756 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:11,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 307 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:32:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 22:32:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-04-06 22:32:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 22:32:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2022-04-06 22:32:11,775 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84 [2022-04-06 22:32:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:11,775 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2022-04-06 22:32:11,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2022-04-06 22:32:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 22:32:11,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:11,776 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-04-06 22:32:11,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:11,976 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 [2022-04-06 22:32:11,977 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times [2022-04-06 22:32:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:11,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183180596] [2022-04-06 22:32:11,978 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times [2022-04-06 22:32:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:11,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402218478] [2022-04-06 22:32:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:11,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127453141] [2022-04-06 22:32:11,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:11,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:11,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:11,987 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) [2022-04-06 22:32:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 22:32:12,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:12,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:32:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:12,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:32:12,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402218478] [2022-04-06 22:32:12,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127453141] [2022-04-06 22:32:12,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127453141] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:12,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:12,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:12,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:12,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183180596] [2022-04-06 22:32:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183180596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:12,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:12,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:32:12,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106129942] [2022-04-06 22:32:12,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:12,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:32:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:32:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:32:12,142 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:12,220 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions. [2022-04-06 22:32:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:32:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-04-06 22:32:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:12,221 INFO L225 Difference]: With dead ends: 371 [2022-04-06 22:32:12,222 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 22:32:12,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:12,222 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:12,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 22:32:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-04-06 22:32:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-06 22:32:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-04-06 22:32:12,245 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87 [2022-04-06 22:32:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:12,245 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-04-06 22:32:12,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-04-06 22:32:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 22:32:12,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:12,246 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 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, 1, 1, 1] [2022-04-06 22:32:12,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:12,483 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 [2022-04-06 22:32:12,484 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times [2022-04-06 22:32:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [784053117] [2022-04-06 22:32:12,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times [2022-04-06 22:32:12,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:12,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876345747] [2022-04-06 22:32:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:12,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256094813] [2022-04-06 22:32:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:12,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:12,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:12,493 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) [2022-04-06 22:32:12,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 22:32:12,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:12,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 22:32:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 22:32:12,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 22:32:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876345747] [2022-04-06 22:32:12,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256094813] [2022-04-06 22:32:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256094813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:12,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:12,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 22:32:12,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:12,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [784053117] [2022-04-06 22:32:12,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [784053117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:12,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:12,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428580104] [2022-04-06 22:32:12,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:12,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:32:12,915 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:32:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:13,102 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions. [2022-04-06 22:32:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:32:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2022-04-06 22:32:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:13,116 INFO L225 Difference]: With dead ends: 301 [2022-04-06 22:32:13,116 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 22:32:13,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:13,117 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:13,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 236 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 22:32:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2022-04-06 22:32:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 22:32:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2022-04-06 22:32:13,146 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89 [2022-04-06 22:32:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:13,146 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2022-04-06 22:32:13,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:32:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2022-04-06 22:32:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 22:32:13,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:13,147 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:13,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:13,363 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 [2022-04-06 22:32:13,363 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2022-04-06 22:32:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040565258] [2022-04-06 22:32:13,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times [2022-04-06 22:32:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195211017] [2022-04-06 22:32:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:13,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355615960] [2022-04-06 22:32:13,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:13,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:13,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:13,371 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) [2022-04-06 22:32:13,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 22:32:13,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:13,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:32:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 22:32:13,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 22:32:13,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195211017] [2022-04-06 22:32:13,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355615960] [2022-04-06 22:32:13,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355615960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:13,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:13,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 22:32:13,620 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040565258] [2022-04-06 22:32:13,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040565258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:13,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:13,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:13,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251276946] [2022-04-06 22:32:13,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:13,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:13,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:13,621 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:13,712 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-04-06 22:32:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2022-04-06 22:32:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:13,715 INFO L225 Difference]: With dead ends: 463 [2022-04-06 22:32:13,716 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 22:32:13,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:13,717 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:13,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:32:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 22:32:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-04-06 22:32:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions. [2022-04-06 22:32:13,744 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89 [2022-04-06 22:32:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:13,744 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions. [2022-04-06 22:32:13,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:32:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions. [2022-04-06 22:32:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 22:32:13,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:13,745 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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, 1, 1] [2022-04-06 22:32:13,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:13,959 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 [2022-04-06 22:32:13,960 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-04-06 22:32:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:13,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028112863] [2022-04-06 22:32:13,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times [2022-04-06 22:32:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923601524] [2022-04-06 22:32:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:13,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:13,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116356865] [2022-04-06 22:32:13,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:32:13,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:13,980 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) [2022-04-06 22:32:13,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 22:32:14,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:32:14,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 22:32:14,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 22:32:17,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:17,917 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:26,032 WARN L232 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:32:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923601524] [2022-04-06 22:32:26,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116356865] [2022-04-06 22:32:26,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116356865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:32:26,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:32:26,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:32:26,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:26,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028112863] [2022-04-06 22:32:26,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028112863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:26,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:26,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:32:26,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327840300] [2022-04-06 22:32:26,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:26,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:32:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:32:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:32:26,035 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:28,149 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-04-06 22:32:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:32:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2022-04-06 22:32:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:28,151 INFO L225 Difference]: With dead ends: 339 [2022-04-06 22:32:28,151 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 22:32:28,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:32:28,151 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:28,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 269 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 22:32:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 22:32:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-04-06 22:32:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2022-04-06 22:32:28,180 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101 [2022-04-06 22:32:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:28,180 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2022-04-06 22:32:28,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2022-04-06 22:32:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 22:32:28,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:28,181 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:28,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:28,395 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 [2022-04-06 22:32:28,395 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:28,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times [2022-04-06 22:32:28,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:28,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664645447] [2022-04-06 22:32:28,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times [2022-04-06 22:32:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:28,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774276384] [2022-04-06 22:32:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:28,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:28,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401003947] [2022-04-06 22:32:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:28,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:28,427 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) [2022-04-06 22:32:28,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 22:32:28,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:32:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 22:32:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:32:28,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:32:28,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774276384] [2022-04-06 22:32:28,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401003947] [2022-04-06 22:32:28,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401003947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:28,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:28,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 22:32:28,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664645447] [2022-04-06 22:32:28,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664645447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:28,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:28,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935744347] [2022-04-06 22:32:28,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:28,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:28,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:32:28,851 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:28,947 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions. [2022-04-06 22:32:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 22:32:28,948 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-04-06 22:32:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:28,949 INFO L225 Difference]: With dead ends: 341 [2022-04-06 22:32:28,949 INFO L226 Difference]: Without dead ends: 339 [2022-04-06 22:32:28,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-04-06 22:32:28,950 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:28,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 167 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-04-06 22:32:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-04-06 22:32:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-04-06 22:32:28,981 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105 [2022-04-06 22:32:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:28,982 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-04-06 22:32:28,982 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), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-04-06 22:32:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-04-06 22:32:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 22:32:28,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:28,983 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:29,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:29,199 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 [2022-04-06 22:32:29,199 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times [2022-04-06 22:32:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:29,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1367895599] [2022-04-06 22:32:29,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times [2022-04-06 22:32:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:29,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950266565] [2022-04-06 22:32:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:29,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:29,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:29,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311108059] [2022-04-06 22:32:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:29,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:29,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:29,209 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) [2022-04-06 22:32:29,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 22:32:29,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:29,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:29,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 22:32:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 22:32:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950266565] [2022-04-06 22:32:29,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311108059] [2022-04-06 22:32:29,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311108059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:29,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:29,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 22:32:29,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:29,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1367895599] [2022-04-06 22:32:29,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1367895599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:29,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:29,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:32:29,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295419392] [2022-04-06 22:32:29,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:29,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:32:29,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:32:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:29,631 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:29,792 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2022-04-06 22:32:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2022-04-06 22:32:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:29,793 INFO L225 Difference]: With dead ends: 349 [2022-04-06 22:32:29,794 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 22:32:29,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:29,795 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:29,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 22:32:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-04-06 22:32:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-06 22:32:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions. [2022-04-06 22:32:29,830 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106 [2022-04-06 22:32:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:29,831 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions. [2022-04-06 22:32:29,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions. [2022-04-06 22:32:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 22:32:29,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:29,832 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1] [2022-04-06 22:32:29,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:30,047 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 [2022-04-06 22:32:30,047 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times [2022-04-06 22:32:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282521676] [2022-04-06 22:32:30,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times [2022-04-06 22:32:30,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824417075] [2022-04-06 22:32:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:30,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:30,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946635010] [2022-04-06 22:32:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:30,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:30,057 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) [2022-04-06 22:32:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 22:32:30,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:30,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:30,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 22:32:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 22:32:31,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:32,365 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:32,368 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:32:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 22:32:34,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824417075] [2022-04-06 22:32:34,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946635010] [2022-04-06 22:32:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946635010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:34,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-04-06 22:32:34,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282521676] [2022-04-06 22:32:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282521676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:34,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:32:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64124663] [2022-04-06 22:32:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:34,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:32:34,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:32:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:32:34,249 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:32:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:35,513 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions. [2022-04-06 22:32:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:32:35,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2022-04-06 22:32:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:35,515 INFO L225 Difference]: With dead ends: 369 [2022-04-06 22:32:35,515 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 22:32:35,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-04-06 22:32:35,516 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:35,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 355 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:32:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 22:32:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-04-06 22:32:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-04-06 22:32:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-04-06 22:32:35,552 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107 [2022-04-06 22:32:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:35,552 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-04-06 22:32:35,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:32:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-04-06 22:32:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:32:35,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:35,553 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1] [2022-04-06 22:32:35,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:35,769 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 [2022-04-06 22:32:35,769 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times [2022-04-06 22:32:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557864755] [2022-04-06 22:32:35,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times [2022-04-06 22:32:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355416116] [2022-04-06 22:32:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:35,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120443037] [2022-04-06 22:32:35,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:35,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:35,787 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) [2022-04-06 22:32:35,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 22:32:35,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:35,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 22:32:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 22:32:36,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355416116] [2022-04-06 22:32:36,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120443037] [2022-04-06 22:32:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120443037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:36,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:36,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 22:32:36,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:36,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557864755] [2022-04-06 22:32:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557864755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:36,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:36,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825501992] [2022-04-06 22:32:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:36,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:36,235 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:36,351 INFO L93 Difference]: Finished difference Result 434 states and 549 transitions. [2022-04-06 22:32:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:36,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2022-04-06 22:32:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:36,353 INFO L225 Difference]: With dead ends: 434 [2022-04-06 22:32:36,353 INFO L226 Difference]: Without dead ends: 425 [2022-04-06 22:32:36,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:32:36,354 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:36,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 211 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-04-06 22:32:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2022-04-06 22:32:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 272 states have (on average 1.2022058823529411) internal successors, (327), 279 states have internal predecessors, (327), 106 states have call successors, (106), 45 states have call predecessors, (106), 44 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-06 22:32:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 536 transitions. [2022-04-06 22:32:36,390 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 536 transitions. Word has length 110 [2022-04-06 22:32:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:36,390 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 536 transitions. [2022-04-06 22:32:36,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 536 transitions. [2022-04-06 22:32:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 22:32:36,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:36,391 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2022-04-06 22:32:36,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:36,595 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 [2022-04-06 22:32:36,595 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 5 times [2022-04-06 22:32:36,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:36,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319698688] [2022-04-06 22:32:36,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 6 times [2022-04-06 22:32:36,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907656169] [2022-04-06 22:32:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:36,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:36,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366935670] [2022-04-06 22:32:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:36,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:36,606 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) [2022-04-06 22:32:36,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 22:32:36,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:36,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 22:32:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:36,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:36,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907656169] [2022-04-06 22:32:36,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366935670] [2022-04-06 22:32:36,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366935670] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:36,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:36,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 22:32:36,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319698688] [2022-04-06 22:32:36,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319698688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:36,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:36,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 22:32:36,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032821743] [2022-04-06 22:32:36,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:36,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 22:32:36,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 22:32:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 22:32:36,998 INFO L87 Difference]: Start difference. First operand 423 states and 536 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 22:32:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:37,294 INFO L93 Difference]: Finished difference Result 589 states and 810 transitions. [2022-04-06 22:32:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:32:37,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2022-04-06 22:32:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:37,297 INFO L225 Difference]: With dead ends: 589 [2022-04-06 22:32:37,297 INFO L226 Difference]: Without dead ends: 581 [2022-04-06 22:32:37,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:32:37,298 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 32 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:37,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 368 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:32:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-04-06 22:32:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 470. [2022-04-06 22:32:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 301 states have (on average 1.2259136212624584) internal successors, (369), 306 states have internal predecessors, (369), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-04-06 22:32:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 614 transitions. [2022-04-06 22:32:37,344 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 614 transitions. Word has length 111 [2022-04-06 22:32:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:37,344 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 614 transitions. [2022-04-06 22:32:37,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 22:32:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 614 transitions. [2022-04-06 22:32:37,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 22:32:37,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:37,345 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 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, 1, 1, 1] [2022-04-06 22:32:37,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:37,561 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 [2022-04-06 22:32:37,561 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:37,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 3 times [2022-04-06 22:32:37,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:37,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1595949050] [2022-04-06 22:32:37,562 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:37,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 4 times [2022-04-06 22:32:37,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:37,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687846649] [2022-04-06 22:32:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:37,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:37,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:37,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376420258] [2022-04-06 22:32:37,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:37,569 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) [2022-04-06 22:32:37,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 22:32:37,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:37,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:37,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 22:32:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 22:32:37,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687846649] [2022-04-06 22:32:38,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376420258] [2022-04-06 22:32:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376420258] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:38,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:38,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 22:32:38,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1595949050] [2022-04-06 22:32:38,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1595949050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:38,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:38,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:32:38,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128297102] [2022-04-06 22:32:38,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:38,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:32:38,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:32:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:32:38,027 INFO L87 Difference]: Start difference. First operand 470 states and 614 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:38,185 INFO L93 Difference]: Finished difference Result 644 states and 881 transitions. [2022-04-06 22:32:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:32:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2022-04-06 22:32:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:38,187 INFO L225 Difference]: With dead ends: 644 [2022-04-06 22:32:38,187 INFO L226 Difference]: Without dead ends: 474 [2022-04-06 22:32:38,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:32:38,192 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:38,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 172 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-04-06 22:32:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-04-06 22:32:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 305 states have (on average 1.2163934426229508) internal successors, (371), 310 states have internal predecessors, (371), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-04-06 22:32:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 616 transitions. [2022-04-06 22:32:38,237 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 616 transitions. Word has length 112 [2022-04-06 22:32:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:38,237 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 616 transitions. [2022-04-06 22:32:38,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 616 transitions. [2022-04-06 22:32:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 22:32:38,238 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:38,238 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:38,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 22:32:38,453 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 [2022-04-06 22:32:38,454 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 5 times [2022-04-06 22:32:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911765560] [2022-04-06 22:32:38,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 6 times [2022-04-06 22:32:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:38,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37073468] [2022-04-06 22:32:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:38,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:38,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719396247] [2022-04-06 22:32:38,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:38,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:38,462 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) [2022-04-06 22:32:38,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 22:32:38,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:32:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 22:32:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 22:32:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 22:32:38,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37073468] [2022-04-06 22:32:38,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719396247] [2022-04-06 22:32:38,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719396247] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:38,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 22:32:38,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:38,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911765560] [2022-04-06 22:32:38,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911765560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:38,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:38,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:32:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992058418] [2022-04-06 22:32:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:38,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:32:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:32:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:32:38,922 INFO L87 Difference]: Start difference. First operand 474 states and 616 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:39,093 INFO L93 Difference]: Finished difference Result 731 states and 966 transitions. [2022-04-06 22:32:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:32:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-04-06 22:32:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:39,095 INFO L225 Difference]: With dead ends: 731 [2022-04-06 22:32:39,095 INFO L226 Difference]: Without dead ends: 561 [2022-04-06 22:32:39,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:32:39,096 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:39,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 231 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:32:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-04-06 22:32:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 553. [2022-04-06 22:32:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 361 states have (on average 1.1911357340720221) internal successors, (430), 367 states have internal predecessors, (430), 133 states have call successors, (133), 59 states have call predecessors, (133), 58 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 22:32:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 692 transitions. [2022-04-06 22:32:39,146 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 692 transitions. Word has length 116 [2022-04-06 22:32:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:39,147 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 692 transitions. [2022-04-06 22:32:39,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 22:32:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 692 transitions. [2022-04-06 22:32:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 22:32:39,147 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:39,147 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:39,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:39,363 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 [2022-04-06 22:32:39,364 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 3 times [2022-04-06 22:32:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [819053906] [2022-04-06 22:32:39,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 4 times [2022-04-06 22:32:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242589467] [2022-04-06 22:32:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:39,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142404298] [2022-04-06 22:32:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:32:39,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:39,373 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) [2022-04-06 22:32:39,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 22:32:39,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:32:39,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 22:32:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:32:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 43 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 22:32:39,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:32:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-04-06 22:32:39,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:32:39,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242589467] [2022-04-06 22:32:39,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:32:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142404298] [2022-04-06 22:32:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142404298] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:32:39,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:32:39,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 22:32:39,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:32:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [819053906] [2022-04-06 22:32:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [819053906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:32:39,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:32:39,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:32:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928266306] [2022-04-06 22:32:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:32:39,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:32:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:32:39,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:32:39,858 INFO L87 Difference]: Start difference. First operand 553 states and 692 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:32:40,126 INFO L93 Difference]: Finished difference Result 606 states and 774 transitions. [2022-04-06 22:32:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:32:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 118 [2022-04-06 22:32:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:32:40,129 INFO L225 Difference]: With dead ends: 606 [2022-04-06 22:32:40,129 INFO L226 Difference]: Without dead ends: 603 [2022-04-06 22:32:40,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:32:40,131 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:32:40,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 316 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:32:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-04-06 22:32:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2022-04-06 22:32:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 386 states have (on average 1.2098445595854923) internal successors, (467), 393 states have internal predecessors, (467), 150 states have call successors, (150), 60 states have call predecessors, (150), 59 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2022-04-06 22:32:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 763 transitions. [2022-04-06 22:32:40,185 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 763 transitions. Word has length 118 [2022-04-06 22:32:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:32:40,185 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 763 transitions. [2022-04-06 22:32:40,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:32:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 763 transitions. [2022-04-06 22:32:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 22:32:40,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:32:40,186 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:32:40,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 22:32:40,402 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 [2022-04-06 22:32:40,402 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:32:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:32:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 5 times [2022-04-06 22:32:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:32:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711081519] [2022-04-06 22:32:40,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:32:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 6 times [2022-04-06 22:32:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:32:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196187691] [2022-04-06 22:32:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:32:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:32:40,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:32:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376884705] [2022-04-06 22:32:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:32:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:32:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:32:40,409 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) [2022-04-06 22:32:40,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 22:32:40,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:32:40,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:32:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 22:32:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-04-06 22:33:01,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:04,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:04,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196187691] [2022-04-06 22:33:04,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:04,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376884705] [2022-04-06 22:33:04,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376884705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:33:04,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:33:04,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:33:04,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711081519] [2022-04-06 22:33:04,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711081519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:04,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:04,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:33:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395499714] [2022-04-06 22:33:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:04,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:33:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:33:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:33:04,731 INFO L87 Difference]: Start difference. First operand 596 states and 763 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:33:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:06,259 INFO L93 Difference]: Finished difference Result 619 states and 791 transitions. [2022-04-06 22:33:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:33:06,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2022-04-06 22:33:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:06,262 INFO L225 Difference]: With dead ends: 619 [2022-04-06 22:33:06,262 INFO L226 Difference]: Without dead ends: 615 [2022-04-06 22:33:06,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-04-06 22:33:06,264 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:06,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 293 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 22:33:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-04-06 22:33:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 609. [2022-04-06 22:33:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 394 states have (on average 1.2081218274111676) internal successors, (476), 400 states have internal predecessors, (476), 154 states have call successors, (154), 62 states have call predecessors, (154), 60 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 22:33:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 780 transitions. [2022-04-06 22:33:06,379 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 780 transitions. Word has length 124 [2022-04-06 22:33:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:06,379 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 780 transitions. [2022-04-06 22:33:06,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:33:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 780 transitions. [2022-04-06 22:33:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 22:33:06,380 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:06,380 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:06,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:06,585 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 [2022-04-06 22:33:06,585 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 7 times [2022-04-06 22:33:06,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:06,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220935370] [2022-04-06 22:33:06,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 8 times [2022-04-06 22:33:06,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:06,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590112885] [2022-04-06 22:33:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:06,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:06,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981241179] [2022-04-06 22:33:06,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:06,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:06,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:06,592 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) [2022-04-06 22:33:06,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 22:33:06,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:06,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 22:33:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:07,194 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:07,195 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 22:33:07,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 125 proven. 32 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-04-06 22:33:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590112885] [2022-04-06 22:33:07,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:07,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981241179] [2022-04-06 22:33:07,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981241179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:07,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:07,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 22:33:07,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220935370] [2022-04-06 22:33:07,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220935370] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:07,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:07,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:33:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506320077] [2022-04-06 22:33:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:07,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:33:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:33:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:33:07,833 INFO L87 Difference]: Start difference. First operand 609 states and 780 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 22:33:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:08,370 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2022-04-06 22:33:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:33:08,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2022-04-06 22:33:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:08,388 INFO L225 Difference]: With dead ends: 638 [2022-04-06 22:33:08,388 INFO L226 Difference]: Without dead ends: 636 [2022-04-06 22:33:08,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:33:08,389 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 38 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:08,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 428 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:33:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-04-06 22:33:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 632. [2022-04-06 22:33:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 410 states have internal predecessors, (490), 166 states have call successors, (166), 63 states have call predecessors, (166), 61 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 22:33:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2022-04-06 22:33:08,495 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2022-04-06 22:33:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:08,495 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2022-04-06 22:33:08,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 22:33:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2022-04-06 22:33:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 22:33:08,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:08,496 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:08,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:08,714 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 [2022-04-06 22:33:08,715 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 9 times [2022-04-06 22:33:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019398183] [2022-04-06 22:33:08,715 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 10 times [2022-04-06 22:33:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855032618] [2022-04-06 22:33:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:08,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:08,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263635006] [2022-04-06 22:33:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:08,723 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) [2022-04-06 22:33:08,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 22:33:08,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:08,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:08,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 22:33:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 69 proven. 118 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-04-06 22:33:09,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-04-06 22:33:14,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855032618] [2022-04-06 22:33:14,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263635006] [2022-04-06 22:33:14,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263635006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:14,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:14,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-04-06 22:33:14,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019398183] [2022-04-06 22:33:14,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019398183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:14,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:14,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:33:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516577357] [2022-04-06 22:33:14,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:14,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:33:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:33:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=354, Unknown=1, NotChecked=0, Total=462 [2022-04-06 22:33:14,909 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 22:33:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:15,472 INFO L93 Difference]: Finished difference Result 642 states and 827 transitions. [2022-04-06 22:33:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:33:15,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-04-06 22:33:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:15,474 INFO L225 Difference]: With dead ends: 642 [2022-04-06 22:33:15,474 INFO L226 Difference]: Without dead ends: 640 [2022-04-06 22:33:15,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=144, Invalid=505, Unknown=1, NotChecked=0, Total=650 [2022-04-06 22:33:15,475 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 37 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:15,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 375 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:33:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-04-06 22:33:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2022-04-06 22:33:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 413 states have internal predecessors, (493), 166 states have call successors, (166), 64 states have call predecessors, (166), 62 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-06 22:33:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 821 transitions. [2022-04-06 22:33:15,538 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 821 transitions. Word has length 128 [2022-04-06 22:33:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:15,538 INFO L478 AbstractCegarLoop]: Abstraction has 636 states and 821 transitions. [2022-04-06 22:33:15,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 22:33:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 821 transitions. [2022-04-06 22:33:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 22:33:15,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:15,539 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:15,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 22:33:15,755 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 [2022-04-06 22:33:15,755 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 7 times [2022-04-06 22:33:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:15,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336616076] [2022-04-06 22:33:15,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 8 times [2022-04-06 22:33:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941248294] [2022-04-06 22:33:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:15,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390270633] [2022-04-06 22:33:15,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:15,769 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) [2022-04-06 22:33:15,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 22:33:15,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:15,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 22:33:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 137 proven. 57 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 22:33:16,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:17,212 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 12 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-04-06 22:33:17,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941248294] [2022-04-06 22:33:17,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390270633] [2022-04-06 22:33:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390270633] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:17,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:17,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 22:33:17,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336616076] [2022-04-06 22:33:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336616076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:17,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:17,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:33:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030728933] [2022-04-06 22:33:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:17,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:33:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:33:17,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:33:17,370 INFO L87 Difference]: Start difference. First operand 636 states and 821 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 22:33:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:18,822 INFO L93 Difference]: Finished difference Result 669 states and 868 transitions. [2022-04-06 22:33:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:33:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2022-04-06 22:33:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:18,830 INFO L225 Difference]: With dead ends: 669 [2022-04-06 22:33:18,830 INFO L226 Difference]: Without dead ends: 664 [2022-04-06 22:33:18,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:33:18,830 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:18,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 430 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:33:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-04-06 22:33:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 644. [2022-04-06 22:33:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 411 states have (on average 1.2092457420924574) internal successors, (497), 417 states have internal predecessors, (497), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-04-06 22:33:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 832 transitions. [2022-04-06 22:33:18,898 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 832 transitions. Word has length 130 [2022-04-06 22:33:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:18,898 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 832 transitions. [2022-04-06 22:33:18,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 22:33:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 832 transitions. [2022-04-06 22:33:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 22:33:18,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:18,899 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 22:33:18,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:19,114 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 [2022-04-06 22:33:19,115 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:19,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 7 times [2022-04-06 22:33:19,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:19,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300744484] [2022-04-06 22:33:19,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 8 times [2022-04-06 22:33:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342220746] [2022-04-06 22:33:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:19,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:19,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590672150] [2022-04-06 22:33:19,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:19,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:19,127 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) [2022-04-06 22:33:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 22:33:19,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:19,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 22:33:19,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 22:33:19,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 22:33:19,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342220746] [2022-04-06 22:33:19,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:19,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590672150] [2022-04-06 22:33:19,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590672150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:19,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:19,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 22:33:19,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300744484] [2022-04-06 22:33:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300744484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:19,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:19,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:33:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395656468] [2022-04-06 22:33:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:19,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:33:19,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:33:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:33:19,634 INFO L87 Difference]: Start difference. First operand 644 states and 832 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:19,810 INFO L93 Difference]: Finished difference Result 662 states and 853 transitions. [2022-04-06 22:33:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:33:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-04-06 22:33:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:19,812 INFO L225 Difference]: With dead ends: 662 [2022-04-06 22:33:19,812 INFO L226 Difference]: Without dead ends: 653 [2022-04-06 22:33:19,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=300, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:33:19,813 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:19,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:33:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-04-06 22:33:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2022-04-06 22:33:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 420 states have (on average 1.2047619047619047) internal successors, (506), 426 states have internal predecessors, (506), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-04-06 22:33:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 841 transitions. [2022-04-06 22:33:19,879 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 841 transitions. Word has length 133 [2022-04-06 22:33:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:19,879 INFO L478 AbstractCegarLoop]: Abstraction has 653 states and 841 transitions. [2022-04-06 22:33:19,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 841 transitions. [2022-04-06 22:33:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 22:33:19,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:19,880 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:19,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:20,095 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 [2022-04-06 22:33:20,096 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 9 times [2022-04-06 22:33:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:20,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617281954] [2022-04-06 22:33:20,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 10 times [2022-04-06 22:33:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122546449] [2022-04-06 22:33:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:20,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:20,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:20,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132526435] [2022-04-06 22:33:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:20,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:20,102 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) [2022-04-06 22:33:20,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 22:33:20,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:20,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 22:33:20,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:20,843 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:20,845 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:20,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:20,858 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 22:33:21,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:22,046 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 22:33:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122546449] [2022-04-06 22:33:22,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132526435] [2022-04-06 22:33:22,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132526435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:22,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:22,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-04-06 22:33:22,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617281954] [2022-04-06 22:33:22,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617281954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:22,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:22,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:33:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991408191] [2022-04-06 22:33:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:22,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:33:22,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:33:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:33:22,220 INFO L87 Difference]: Start difference. First operand 653 states and 841 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-04-06 22:33:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:24,400 INFO L93 Difference]: Finished difference Result 687 states and 892 transitions. [2022-04-06 22:33:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:33:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 134 [2022-04-06 22:33:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:24,403 INFO L225 Difference]: With dead ends: 687 [2022-04-06 22:33:24,403 INFO L226 Difference]: Without dead ends: 684 [2022-04-06 22:33:24,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-04-06 22:33:24,404 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:24,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 463 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 22:33:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-04-06 22:33:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 679. [2022-04-06 22:33:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 433 states have (on average 1.210161662817552) internal successors, (524), 439 states have internal predecessors, (524), 181 states have call successors, (181), 65 states have call predecessors, (181), 64 states have return successors, (178), 174 states have call predecessors, (178), 178 states have call successors, (178) [2022-04-06 22:33:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 883 transitions. [2022-04-06 22:33:24,473 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 883 transitions. Word has length 134 [2022-04-06 22:33:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:24,473 INFO L478 AbstractCegarLoop]: Abstraction has 679 states and 883 transitions. [2022-04-06 22:33:24,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-04-06 22:33:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 883 transitions. [2022-04-06 22:33:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 22:33:24,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:24,474 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:24,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 22:33:24,689 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 [2022-04-06 22:33:24,689 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 7 times [2022-04-06 22:33:24,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892757531] [2022-04-06 22:33:24,690 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 8 times [2022-04-06 22:33:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:24,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584702197] [2022-04-06 22:33:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:24,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521305088] [2022-04-06 22:33:24,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:24,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:24,700 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) [2022-04-06 22:33:24,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 22:33:24,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:24,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:33:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 22:33:24,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 22:33:25,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584702197] [2022-04-06 22:33:25,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521305088] [2022-04-06 22:33:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521305088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:25,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:25,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 22:33:25,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892757531] [2022-04-06 22:33:25,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892757531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:25,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:25,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:33:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912329708] [2022-04-06 22:33:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:25,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:33:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:33:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:33:25,065 INFO L87 Difference]: Start difference. First operand 679 states and 883 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:25,287 INFO L93 Difference]: Finished difference Result 991 states and 1310 transitions. [2022-04-06 22:33:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:33:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2022-04-06 22:33:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:25,290 INFO L225 Difference]: With dead ends: 991 [2022-04-06 22:33:25,290 INFO L226 Difference]: Without dead ends: 794 [2022-04-06 22:33:25,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:33:25,291 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 78 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:25,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 281 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:33:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-04-06 22:33:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 784. [2022-04-06 22:33:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 504 states have (on average 1.1845238095238095) internal successors, (597), 510 states have internal predecessors, (597), 198 states have call successors, (198), 83 states have call predecessors, (198), 81 states have return successors, (194), 190 states have call predecessors, (194), 194 states have call successors, (194) [2022-04-06 22:33:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 989 transitions. [2022-04-06 22:33:25,389 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 989 transitions. Word has length 139 [2022-04-06 22:33:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:25,389 INFO L478 AbstractCegarLoop]: Abstraction has 784 states and 989 transitions. [2022-04-06 22:33:25,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 22:33:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 989 transitions. [2022-04-06 22:33:25,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 22:33:25,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:25,391 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:25,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:25,606 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 [2022-04-06 22:33:25,606 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 11 times [2022-04-06 22:33:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [75880185] [2022-04-06 22:33:25,607 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 12 times [2022-04-06 22:33:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924725543] [2022-04-06 22:33:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:25,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:25,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149338858] [2022-04-06 22:33:25,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:33:25,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:25,613 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) [2022-04-06 22:33:25,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 22:33:26,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:33:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 22:33:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 101 proven. 93 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-04-06 22:33:34,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:41,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924725543] [2022-04-06 22:33:41,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149338858] [2022-04-06 22:33:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149338858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:33:41,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:33:41,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 22:33:41,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:41,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [75880185] [2022-04-06 22:33:41,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [75880185] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:41,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:41,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 22:33:41,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179158005] [2022-04-06 22:33:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:41,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 22:33:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 22:33:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=682, Unknown=2, NotChecked=0, Total=812 [2022-04-06 22:33:41,284 INFO L87 Difference]: Start difference. First operand 784 states and 989 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:33:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:53,243 INFO L93 Difference]: Finished difference Result 838 states and 1061 transitions. [2022-04-06 22:33:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 22:33:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 141 [2022-04-06 22:33:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:53,247 INFO L225 Difference]: With dead ends: 838 [2022-04-06 22:33:53,247 INFO L226 Difference]: Without dead ends: 833 [2022-04-06 22:33:53,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=189, Invalid=999, Unknown=2, NotChecked=0, Total=1190 [2022-04-06 22:33:53,248 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:53,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 414 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 825 Invalid, 0 Unknown, 16 Unchecked, 7.9s Time] [2022-04-06 22:33:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-04-06 22:33:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 817. [2022-04-06 22:33:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 523 states have (on average 1.1892925430210326) internal successors, (622), 529 states have internal predecessors, (622), 210 states have call successors, (210), 85 states have call predecessors, (210), 83 states have return successors, (206), 202 states have call predecessors, (206), 206 states have call successors, (206) [2022-04-06 22:33:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1038 transitions. [2022-04-06 22:33:53,349 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1038 transitions. Word has length 141 [2022-04-06 22:33:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:53,349 INFO L478 AbstractCegarLoop]: Abstraction has 817 states and 1038 transitions. [2022-04-06 22:33:53,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 22:33:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1038 transitions. [2022-04-06 22:33:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 22:33:53,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:53,351 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:53,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 22:33:53,557 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 [2022-04-06 22:33:53,557 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:53,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 13 times [2022-04-06 22:33:53,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:53,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324931004] [2022-04-06 22:33:53,558 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 14 times [2022-04-06 22:33:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:53,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938227154] [2022-04-06 22:33:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:53,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:53,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207081653] [2022-04-06 22:33:53,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:53,567 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) [2022-04-06 22:33:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 22:33:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 22:33:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:54,667 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 112 proven. 92 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-04-06 22:33:55,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-04-06 22:33:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:56,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938227154] [2022-04-06 22:33:56,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:56,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207081653] [2022-04-06 22:33:56,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207081653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:56,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:56,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-04-06 22:33:56,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:56,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324931004] [2022-04-06 22:33:56,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324931004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:56,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:56,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:33:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799272214] [2022-04-06 22:33:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:56,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:33:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:33:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:33:56,673 INFO L87 Difference]: Start difference. First operand 817 states and 1038 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 22:33:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:57,849 INFO L93 Difference]: Finished difference Result 860 states and 1093 transitions. [2022-04-06 22:33:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:33:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 146 [2022-04-06 22:33:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:57,852 INFO L225 Difference]: With dead ends: 860 [2022-04-06 22:33:57,853 INFO L226 Difference]: Without dead ends: 858 [2022-04-06 22:33:57,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-04-06 22:33:57,853 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:57,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 498 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:33:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-04-06 22:33:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 852. [2022-04-06 22:33:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 542 states have (on average 1.1900369003690037) internal successors, (645), 548 states have internal predecessors, (645), 222 states have call successors, (222), 89 states have call predecessors, (222), 87 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-04-06 22:33:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1085 transitions. [2022-04-06 22:33:57,966 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1085 transitions. Word has length 146 [2022-04-06 22:33:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:57,966 INFO L478 AbstractCegarLoop]: Abstraction has 852 states and 1085 transitions. [2022-04-06 22:33:57,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 22:33:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1085 transitions. [2022-04-06 22:33:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 22:33:57,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:57,967 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:57,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 22:33:58,180 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 [2022-04-06 22:33:58,180 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 15 times [2022-04-06 22:33:58,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:58,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918153604] [2022-04-06 22:33:58,181 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:58,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 16 times [2022-04-06 22:33:58,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:58,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816701835] [2022-04-06 22:33:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:58,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:58,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:58,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076015144] [2022-04-06 22:33:58,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:58,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:58,200 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) [2022-04-06 22:33:58,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 22:33:58,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 22:33:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:59,148 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:33:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 188 proven. 160 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2022-04-06 22:33:59,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 217 proven. 103 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2022-04-06 22:34:15,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816701835] [2022-04-06 22:34:15,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076015144] [2022-04-06 22:34:15,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076015144] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:15,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:15,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-04-06 22:34:15,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918153604] [2022-04-06 22:34:15,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918153604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:15,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:15,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:34:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190872794] [2022-04-06 22:34:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:15,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:34:15,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:34:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=564, Unknown=1, NotChecked=0, Total=756 [2022-04-06 22:34:15,235 INFO L87 Difference]: Start difference. First operand 852 states and 1085 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 22:34:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:16,216 INFO L93 Difference]: Finished difference Result 864 states and 1096 transitions. [2022-04-06 22:34:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:34:16,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 151 [2022-04-06 22:34:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:16,219 INFO L225 Difference]: With dead ends: 864 [2022-04-06 22:34:16,219 INFO L226 Difference]: Without dead ends: 862 [2022-04-06 22:34:16,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=204, Invalid=665, Unknown=1, NotChecked=0, Total=870 [2022-04-06 22:34:16,219 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 44 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:16,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 398 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:34:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-04-06 22:34:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 856. [2022-04-06 22:34:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 545 states have (on average 1.1889908256880735) internal successors, (648), 551 states have internal predecessors, (648), 222 states have call successors, (222), 90 states have call predecessors, (222), 88 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-04-06 22:34:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1088 transitions. [2022-04-06 22:34:16,322 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1088 transitions. Word has length 151 [2022-04-06 22:34:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:16,323 INFO L478 AbstractCegarLoop]: Abstraction has 856 states and 1088 transitions. [2022-04-06 22:34:16,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-04-06 22:34:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1088 transitions. [2022-04-06 22:34:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 22:34:16,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:16,326 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:16,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 22:34:16,542 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 [2022-04-06 22:34:16,542 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 17 times [2022-04-06 22:34:16,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221567063] [2022-04-06 22:34:16,543 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 18 times [2022-04-06 22:34:16,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582170705] [2022-04-06 22:34:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:16,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:16,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:16,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235907560] [2022-04-06 22:34:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:16,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:16,554 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) [2022-04-06 22:34:16,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 22:34:17,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:34:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 22:34:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 143 proven. 148 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2022-04-06 22:34:18,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:21,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582170705] [2022-04-06 22:34:21,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235907560] [2022-04-06 22:34:21,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235907560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:34:21,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:34:21,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 22:34:21,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221567063] [2022-04-06 22:34:21,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221567063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:21,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:21,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:34:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546698786] [2022-04-06 22:34:21,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:21,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:34:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:34:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:34:21,580 INFO L87 Difference]: Start difference. First operand 856 states and 1088 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 22:34:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:23,488 INFO L93 Difference]: Finished difference Result 879 states and 1115 transitions. [2022-04-06 22:34:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:34:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 151 [2022-04-06 22:34:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:23,509 INFO L225 Difference]: With dead ends: 879 [2022-04-06 22:34:23,509 INFO L226 Difference]: Without dead ends: 877 [2022-04-06 22:34:23,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-04-06 22:34:23,510 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 48 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:23,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 460 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 22:34:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-04-06 22:34:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 871. [2022-04-06 22:34:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 554 states have (on average 1.1895306859205776) internal successors, (659), 560 states have internal predecessors, (659), 226 states have call successors, (226), 92 states have call predecessors, (226), 90 states have return successors, (222), 218 states have call predecessors, (222), 222 states have call successors, (222) [2022-04-06 22:34:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1107 transitions. [2022-04-06 22:34:23,618 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1107 transitions. Word has length 151 [2022-04-06 22:34:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:23,618 INFO L478 AbstractCegarLoop]: Abstraction has 871 states and 1107 transitions. [2022-04-06 22:34:23,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 22:34:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1107 transitions. [2022-04-06 22:34:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 22:34:23,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:23,620 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:23,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:23,825 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 [2022-04-06 22:34:23,826 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 11 times [2022-04-06 22:34:23,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092611313] [2022-04-06 22:34:23,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 12 times [2022-04-06 22:34:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:23,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105714147] [2022-04-06 22:34:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:23,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277788918] [2022-04-06 22:34:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:23,844 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) [2022-04-06 22:34:23,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 22:34:23,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:34:23,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:23,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 22:34:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 89 proven. 111 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-04-06 22:34:24,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:25,087 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:34:47,802 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:36:54,443 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_408 Int) (v_main_~x~0_BEFORE_CALL_428 Int) (v_main_~y~0_BEFORE_CALL_415 Int) (v_main_~p~0_BEFORE_CALL_299 Int) (v_main_~k~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_395 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~r~0_BEFORE_CALL_327 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_224 v_main_~b~0_BEFORE_CALL_408) v_main_~b~0_BEFORE_CALL_408) 0) (= (+ (* v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_428 v_main_~q~0_BEFORE_CALL_395) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_415 v_main_~s~0_BEFORE_CALL_397)) (+ (* v_main_~p~0_BEFORE_CALL_299 v_main_~x~0_BEFORE_CALL_428) (* v_main_~y~0_BEFORE_CALL_415 v_main_~r~0_BEFORE_CALL_327))) (<= v_main_~b~0_BEFORE_CALL_408 0))))) is different from true [2022-04-06 22:37:54,571 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_408 Int) (v_main_~x~0_BEFORE_CALL_428 Int) (v_main_~y~0_BEFORE_CALL_415 Int) (v_main_~p~0_BEFORE_CALL_299 Int) (v_main_~k~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_395 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~r~0_BEFORE_CALL_327 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_224 v_main_~b~0_BEFORE_CALL_408) v_main_~b~0_BEFORE_CALL_408) 0) (= (+ (* v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_428 v_main_~q~0_BEFORE_CALL_395) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_415 v_main_~s~0_BEFORE_CALL_397)) (+ (* v_main_~p~0_BEFORE_CALL_299 v_main_~x~0_BEFORE_CALL_428) (* v_main_~y~0_BEFORE_CALL_415 v_main_~r~0_BEFORE_CALL_327))) (<= v_main_~b~0_BEFORE_CALL_408 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 22:38:26,633 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_408 Int) (v_main_~x~0_BEFORE_CALL_428 Int) (v_main_~y~0_BEFORE_CALL_415 Int) (v_main_~p~0_BEFORE_CALL_299 Int) (v_main_~k~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_395 Int) (v_main_~s~0_BEFORE_CALL_397 Int) (v_main_~r~0_BEFORE_CALL_327 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_224 v_main_~b~0_BEFORE_CALL_408) v_main_~b~0_BEFORE_CALL_408) 0) (= (+ (* v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_428 v_main_~q~0_BEFORE_CALL_395) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_415 v_main_~s~0_BEFORE_CALL_397)) (+ (* v_main_~p~0_BEFORE_CALL_299 v_main_~x~0_BEFORE_CALL_428) (* v_main_~y~0_BEFORE_CALL_415 v_main_~r~0_BEFORE_CALL_327))) (<= v_main_~b~0_BEFORE_CALL_408 0)))) is different from true [2022-04-06 22:38:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 128 proven. 68 refuted. 12 times theorem prover too weak. 684 trivial. 5 not checked. [2022-04-06 22:38:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:38:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105714147] [2022-04-06 22:38:27,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:38:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277788918] [2022-04-06 22:38:27,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277788918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:38:27,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:38:27,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-04-06 22:38:27,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:38:27,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092611313] [2022-04-06 22:38:27,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092611313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:38:27,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:38:27,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:38:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626733929] [2022-04-06 22:38:27,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:38:27,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:38:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:38:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=507, Unknown=3, NotChecked=144, Total=756 [2022-04-06 22:38:27,696 INFO L87 Difference]: Start difference. First operand 871 states and 1107 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:38:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:38:28,659 INFO L93 Difference]: Finished difference Result 898 states and 1129 transitions. [2022-04-06 22:38:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:38:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 153 [2022-04-06 22:38:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:38:28,662 INFO L225 Difference]: With dead ends: 898 [2022-04-06 22:38:28,662 INFO L226 Difference]: Without dead ends: 892 [2022-04-06 22:38:28,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=159, Invalid=780, Unknown=3, NotChecked=180, Total=1122 [2022-04-06 22:38:28,663 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:38:28,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 397 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 22:38:28,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-04-06 22:38:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 872. [2022-04-06 22:38:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 560 states have (on average 1.1785714285714286) internal successors, (660), 566 states have internal predecessors, (660), 217 states have call successors, (217), 95 states have call predecessors, (217), 94 states have return successors, (214), 210 states have call predecessors, (214), 214 states have call successors, (214) [2022-04-06 22:38:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1091 transitions. [2022-04-06 22:38:28,784 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1091 transitions. Word has length 153 [2022-04-06 22:38:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:38:28,784 INFO L478 AbstractCegarLoop]: Abstraction has 872 states and 1091 transitions. [2022-04-06 22:38:28,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 22:38:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1091 transitions. [2022-04-06 22:38:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 22:38:28,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:38:28,785 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:38:28,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 22:38:29,002 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 [2022-04-06 22:38:29,003 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:38:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:38:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 9 times [2022-04-06 22:38:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:29,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849274345] [2022-04-06 22:38:29,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:38:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 10 times [2022-04-06 22:38:29,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:38:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885911987] [2022-04-06 22:38:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:38:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:38:29,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:38:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808724865] [2022-04-06 22:38:29,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:38:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:38:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:38:29,010 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) [2022-04-06 22:38:29,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 22:38:29,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:38:29,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:38:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:38:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:38:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 22:38:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:38:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 22:38:29,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:38:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885911987] [2022-04-06 22:38:29,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:38:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808724865] [2022-04-06 22:38:29,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808724865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:38:29,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:38:29,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 22:38:29,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:38:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849274345] [2022-04-06 22:38:29,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849274345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:38:29,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:38:29,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:38:29,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335333604] [2022-04-06 22:38:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:38:29,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:38:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:38:29,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:38:29,533 INFO L87 Difference]: Start difference. First operand 872 states and 1091 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 22:38:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:38:29,767 INFO L93 Difference]: Finished difference Result 893 states and 1116 transitions. [2022-04-06 22:38:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:38:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2022-04-06 22:38:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:38:29,770 INFO L225 Difference]: With dead ends: 893 [2022-04-06 22:38:29,770 INFO L226 Difference]: Without dead ends: 884 [2022-04-06 22:38:29,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=383, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:38:29,773 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:38:29,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 231 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:38:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-04-06 22:38:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-04-06 22:38:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 572 states have (on average 1.1748251748251748) internal successors, (672), 578 states have internal predecessors, (672), 217 states have call successors, (217), 95 states have call predecessors, (217), 94 states have return successors, (214), 210 states have call predecessors, (214), 214 states have call successors, (214) [2022-04-06 22:38:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1103 transitions. [2022-04-06 22:38:29,886 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1103 transitions. Word has length 156 [2022-04-06 22:38:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:38:29,886 INFO L478 AbstractCegarLoop]: Abstraction has 884 states and 1103 transitions. [2022-04-06 22:38:29,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-06 22:38:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1103 transitions. [2022-04-06 22:38:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 22:38:29,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:38:29,887 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:38:29,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 22:38:30,103 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 [2022-04-06 22:38:30,104 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:38:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:38:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 13 times [2022-04-06 22:38:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:30,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1543667582] [2022-04-06 22:38:30,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:38:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 14 times [2022-04-06 22:38:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:38:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98722142] [2022-04-06 22:38:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:38:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:38:30,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:38:30,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028321177] [2022-04-06 22:38:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:38:30,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:38:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:38:30,111 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) [2022-04-06 22:38:30,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 22:38:30,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:38:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:38:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 22:38:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:38:30,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:30,811 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:33,313 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:33,357 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:39,341 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:40,213 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 214 proven. 158 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-04-06 22:38:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:38:46,644 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 251 proven. 4 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-04-06 22:38:46,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:38:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98722142] [2022-04-06 22:38:46,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:38:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028321177] [2022-04-06 22:38:46,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028321177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:38:46,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:38:46,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-04-06 22:38:46,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:38:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1543667582] [2022-04-06 22:38:46,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1543667582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:38:46,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:38:46,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 22:38:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510633187] [2022-04-06 22:38:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:38:46,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 22:38:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 22:38:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-04-06 22:38:46,902 INFO L87 Difference]: Start difference. First operand 884 states and 1103 transitions. Second operand has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-04-06 22:38:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:38:48,835 INFO L93 Difference]: Finished difference Result 894 states and 1114 transitions. [2022-04-06 22:38:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:38:48,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 157 [2022-04-06 22:38:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:38:48,864 INFO L225 Difference]: With dead ends: 894 [2022-04-06 22:38:48,864 INFO L226 Difference]: Without dead ends: 892 [2022-04-06 22:38:48,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-04-06 22:38:48,866 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 39 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:38:48,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 549 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 857 Invalid, 0 Unknown, 247 Unchecked, 1.7s Time] [2022-04-06 22:38:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-04-06 22:38:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 890. [2022-04-06 22:38:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 576 states have (on average 1.1753472222222223) internal successors, (677), 583 states have internal predecessors, (677), 218 states have call successors, (218), 96 states have call predecessors, (218), 95 states have return successors, (215), 210 states have call predecessors, (215), 215 states have call successors, (215) [2022-04-06 22:38:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1110 transitions. [2022-04-06 22:38:48,992 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1110 transitions. Word has length 157 [2022-04-06 22:38:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:38:48,992 INFO L478 AbstractCegarLoop]: Abstraction has 890 states and 1110 transitions. [2022-04-06 22:38:48,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-04-06 22:38:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1110 transitions. [2022-04-06 22:38:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 22:38:48,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:38:48,993 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:38:49,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 22:38:49,200 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 [2022-04-06 22:38:49,201 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:38:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:38:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 15 times [2022-04-06 22:38:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:38:49,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1154721683] [2022-04-06 22:38:49,201 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:38:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 16 times [2022-04-06 22:38:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:38:49,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513588187] [2022-04-06 22:38:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:38:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:38:49,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:38:49,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420951002] [2022-04-06 22:38:49,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:38:49,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:38:49,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:38:49,209 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) [2022-04-06 22:38:49,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 22:38:49,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:38:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:38:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 22:38:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:38:53,739 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:53,741 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:53,742 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:38:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 208 proven. 173 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2022-04-06 22:38:54,155 INFO L328 TraceCheckSpWp]: Computing backward predicates...