/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/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:22:51,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:22:51,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:22:51,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:22:51,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:22:51,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:22:51,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:22:51,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:22:51,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:22:51,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:22:51,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:22:51,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:22:51,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:22:51,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:22:51,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:22:51,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:22:51,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:22:51,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:22:51,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:22:51,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:22:51,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:22:51,867 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:22:52,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:22:52,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:22:52,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:22:52,089 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:22:52,089 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:22:52,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 19:22:52,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd00cfa2f/8cabbe2e52c34b4bb477f9482274cf01/FLAG84e2c4133 [2022-03-20 19:22:52,494 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:22:52,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-20 19:22:52,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd00cfa2f/8cabbe2e52c34b4bb477f9482274cf01/FLAG84e2c4133 [2022-03-20 19:22:52,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd00cfa2f/8cabbe2e52c34b4bb477f9482274cf01 [2022-03-20 19:22:52,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:22:52,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:22:52,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:22:52,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:22:52,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:22:52,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:22:52" (1/1) ... [2022-03-20 19:22:52,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d81dc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:52, skipping insertion in model container [2022-03-20 19:22:52,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:22:52" (1/1) ... [2022-03-20 19:22:52,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:22:52,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:22:53,066 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/egcd-ll.c[489,502] [2022-03-20 19:22:53,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:22:53,083 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:22:53,090 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/egcd-ll.c[489,502] [2022-03-20 19:22:53,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:22:53,103 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:22:53,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53 WrapperNode [2022-03-20 19:22:53,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:22:53,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:22:53,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:22:53,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:22:53,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:22:53,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:22:53,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:22:53,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:22:53,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (1/1) ... [2022-03-20 19:22:53,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:22:53,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:53,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:22:53,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:22:53,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:22:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:22:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:22:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:22:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:22:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:22:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:22:53,224 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:22:53,225 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:22:53,316 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:22:53,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:22:53,320 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 19:22:53,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:22:53 BoogieIcfgContainer [2022-03-20 19:22:53,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:22:53,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:22:53,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:22:53,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:22:53,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:22:52" (1/3) ... [2022-03-20 19:22:53,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db3796c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:22:53, skipping insertion in model container [2022-03-20 19:22:53,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:22:53" (2/3) ... [2022-03-20 19:22:53,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db3796c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:22:53, skipping insertion in model container [2022-03-20 19:22:53,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:22:53" (3/3) ... [2022-03-20 19:22:53,326 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2022-03-20 19:22:53,330 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:22:53,330 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:22:53,383 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:22:53,388 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:22:53,388 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:22:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 19:22:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 19:22:53,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:53,414 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:53,414 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 1 times [2022-03-20 19:22:53,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:53,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1647897089] [2022-03-20 19:22:53,429 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 2 times [2022-03-20 19:22:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:53,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208151699] [2022-03-20 19:22:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:22:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:22:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:22:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:22:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:22:53,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208151699] [2022-03-20 19:22:53,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208151699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:53,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:53,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:22:53,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1647897089] [2022-03-20 19:22:53,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1647897089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:53,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:53,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:22:53,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111428885] [2022-03-20 19:22:53,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:53,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:22:53,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:22:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:22:53,609 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:22:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:53,677 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-03-20 19:22:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:22:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 19:22:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:53,687 INFO L225 Difference]: With dead ends: 61 [2022-03-20 19:22:53,687 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 19:22:53,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:22:53,691 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:53,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 19:22:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 19:22:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 19:22:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-20 19:22:53,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-03-20 19:22:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:53,718 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-20 19:22:53,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:22:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-20 19:22:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 19:22:53,720 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:53,720 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:53,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:22:53,720 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 1 times [2022-03-20 19:22:53,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349455697] [2022-03-20 19:22:53,721 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 2 times [2022-03-20 19:22:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:53,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771684484] [2022-03-20 19:22:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:53,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:53,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387739975] [2022-03-20 19:22:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:53,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:53,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:53,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:22:53,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:22:53,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:22:53,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:22:53,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:22:53,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771684484] [2022-03-20 19:22:53,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:53,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387739975] [2022-03-20 19:22:53,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387739975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:53,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:53,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:53,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:53,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349455697] [2022-03-20 19:22:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349455697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:53,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:53,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266040344] [2022-03-20 19:22:53,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:53,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:22:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:22:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:22:53,922 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:22:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:53,984 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-20 19:22:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:22:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 19:22:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:53,985 INFO L225 Difference]: With dead ends: 45 [2022-03-20 19:22:53,985 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 19:22:53,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:22:53,986 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:53,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 19:22:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 19:22:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 19:22:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-03-20 19:22:53,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-03-20 19:22:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:53,997 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-03-20 19:22:53,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:22:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-03-20 19:22:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 19:22:53,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:53,998 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:54,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:54,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:54,211 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 1 times [2022-03-20 19:22:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1063455914] [2022-03-20 19:22:54,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 2 times [2022-03-20 19:22:54,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:54,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658199949] [2022-03-20 19:22:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:54,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:54,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47460315] [2022-03-20 19:22:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:54,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:54,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:54,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:54,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 19:22:54,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 19:22:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 19:22:54,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:22:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658199949] [2022-03-20 19:22:54,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47460315] [2022-03-20 19:22:54,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47460315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:54,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:54,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:22:54,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1063455914] [2022-03-20 19:22:54,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1063455914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:54,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:54,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:22:54,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933684336] [2022-03-20 19:22:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:54,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:22:54,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:54,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:22:54,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:22:54,383 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 19:22:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:54,480 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-03-20 19:22:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:22:54,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 19:22:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:54,481 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:22:54,481 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:22:54,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:22:54,482 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:54,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:22:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:22:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 19:22:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 19:22:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-03-20 19:22:54,491 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-03-20 19:22:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:54,491 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-03-20 19:22:54,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 19:22:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-03-20 19:22:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:22:54,492 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:54,492 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:54,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:54,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 19:22:54,709 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 1 times [2022-03-20 19:22:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:54,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558865347] [2022-03-20 19:22:54,710 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 2 times [2022-03-20 19:22:54,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:54,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197232049] [2022-03-20 19:22:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:54,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:54,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705756105] [2022-03-20 19:22:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:54,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:54,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:54,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 19:22:54,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:54,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 19:22:54,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 19:22:54,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:22:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197232049] [2022-03-20 19:22:54,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705756105] [2022-03-20 19:22:54,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705756105] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:22:54,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:22:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 19:22:54,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:54,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558865347] [2022-03-20 19:22:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558865347] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:54,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728868136] [2022-03-20 19:22:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:54,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:22:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:22:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:22:54,992 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:22:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:55,039 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-03-20 19:22:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:22:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 19:22:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:55,044 INFO L225 Difference]: With dead ends: 71 [2022-03-20 19:22:55,044 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 19:22:55,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:22:55,049 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:55,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 19:22:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 19:22:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 19:22:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-03-20 19:22:55,067 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-03-20 19:22:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:55,067 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-03-20 19:22:55,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:22:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-03-20 19:22:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 19:22:55,068 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:55,068 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:55,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:55,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:55,281 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 1 times [2022-03-20 19:22:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:55,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469741936] [2022-03-20 19:22:55,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 2 times [2022-03-20 19:22:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:55,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114415412] [2022-03-20 19:22:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:55,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:55,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438537675] [2022-03-20 19:22:55,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:55,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:55,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 19:22:55,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:55,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 19:22:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 19:22:55,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:22:55,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114415412] [2022-03-20 19:22:55,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438537675] [2022-03-20 19:22:55,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438537675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:55,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:55,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:55,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469741936] [2022-03-20 19:22:55,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469741936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:55,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:55,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:55,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862918410] [2022-03-20 19:22:55,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:55,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:22:55,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:22:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:22:55,402 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 19:22:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:55,437 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-03-20 19:22:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:22:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-03-20 19:22:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:55,439 INFO L225 Difference]: With dead ends: 73 [2022-03-20 19:22:55,439 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 19:22:55,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:22:55,439 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:55,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 19:22:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 19:22:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 19:22:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-03-20 19:22:55,466 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-03-20 19:22:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:55,467 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-03-20 19:22:55,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 19:22:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-03-20 19:22:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 19:22:55,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:55,469 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:55,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:55,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:55,671 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 1 times [2022-03-20 19:22:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:55,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987640680] [2022-03-20 19:22:55,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 2 times [2022-03-20 19:22:55,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:55,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596511668] [2022-03-20 19:22:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:55,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:55,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558327998] [2022-03-20 19:22:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:55,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:55,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:55,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:55,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 19:22:55,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:55,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 19:22:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 19:22:55,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:22:55,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:55,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596511668] [2022-03-20 19:22:55,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:55,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558327998] [2022-03-20 19:22:55,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558327998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:55,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:55,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:55,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:55,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987640680] [2022-03-20 19:22:55,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987640680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:55,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:55,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:55,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933913968] [2022-03-20 19:22:55,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:55,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:22:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:55,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:22:55,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:22:55,821 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:22:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:55,863 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-03-20 19:22:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:22:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 40 [2022-03-20 19:22:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:55,866 INFO L225 Difference]: With dead ends: 81 [2022-03-20 19:22:55,866 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 19:22:55,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:22:55,867 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:55,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 19:22:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-20 19:22:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 19:22:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-20 19:22:55,901 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-03-20 19:22:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:55,902 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-20 19:22:55,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:22:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-20 19:22:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 19:22:55,908 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:55,908 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:55,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 19:22:56,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:56,123 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 1 times [2022-03-20 19:22:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896454226] [2022-03-20 19:22:56,125 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 2 times [2022-03-20 19:22:56,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:56,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376898066] [2022-03-20 19:22:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:56,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:56,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323449088] [2022-03-20 19:22:56,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:56,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:56,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:56,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 19:22:56,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 19:22:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 19:22:56,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 19:22:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376898066] [2022-03-20 19:22:56,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323449088] [2022-03-20 19:22:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323449088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:22:56,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:22:56,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 19:22:56,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896454226] [2022-03-20 19:22:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896454226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:56,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:56,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:22:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533234075] [2022-03-20 19:22:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:56,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:22:56,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:22:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:22:56,383 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 19:22:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:56,478 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-03-20 19:22:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:22:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-03-20 19:22:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:56,479 INFO L225 Difference]: With dead ends: 85 [2022-03-20 19:22:56,479 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:22:56,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:22:56,480 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:56,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:22:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:22:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 19:22:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 19:22:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-03-20 19:22:56,496 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-03-20 19:22:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:56,496 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-03-20 19:22:56,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 19:22:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-03-20 19:22:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 19:22:56,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:56,497 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:56,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:56,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:56,712 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 3 times [2022-03-20 19:22:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:56,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1526915258] [2022-03-20 19:22:56,713 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 4 times [2022-03-20 19:22:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609603333] [2022-03-20 19:22:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:56,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:56,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399052713] [2022-03-20 19:22:56,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:22:56,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:56,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:56,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 19:22:56,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:22:56,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 19:22:56,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 19:22:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 19:22:57,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609603333] [2022-03-20 19:22:57,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399052713] [2022-03-20 19:22:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399052713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:22:57,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:22:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 19:22:57,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1526915258] [2022-03-20 19:22:57,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1526915258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:57,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:22:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223400362] [2022-03-20 19:22:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:57,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:22:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:22:57,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:22:57,148 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 19:22:57,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:57,312 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-20 19:22:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:22:57,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-03-20 19:22:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:57,313 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:22:57,313 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:22:57,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:22:57,314 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:57,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 239 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:22:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:22:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-03-20 19:22:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 19:22:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-03-20 19:22:57,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 45 [2022-03-20 19:22:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:57,324 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-03-20 19:22:57,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 19:22:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-03-20 19:22:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 19:22:57,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:57,324 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:57,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:57,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:57,544 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 1 times [2022-03-20 19:22:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608425195] [2022-03-20 19:22:57,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:57,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 2 times [2022-03-20 19:22:57,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:57,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798720996] [2022-03-20 19:22:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:57,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952152397] [2022-03-20 19:22:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:57,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:57,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 19:22:57,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:57,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 19:22:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 19:22:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 19:22:57,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798720996] [2022-03-20 19:22:57,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:57,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952152397] [2022-03-20 19:22:57,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952152397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:22:57,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:22:57,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 19:22:57,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:57,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608425195] [2022-03-20 19:22:57,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608425195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:57,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:57,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:22:57,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876358592] [2022-03-20 19:22:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:57,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:22:57,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:22:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:22:57,893 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 19:22:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:58,006 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2022-03-20 19:22:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:22:58,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-03-20 19:22:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:58,007 INFO L225 Difference]: With dead ends: 134 [2022-03-20 19:22:58,007 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 19:22:58,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:22:58,008 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:58,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:22:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 19:22:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 19:22:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 19:22:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-03-20 19:22:58,033 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 50 [2022-03-20 19:22:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:58,034 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-03-20 19:22:58,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 19:22:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-03-20 19:22:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 19:22:58,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:58,035 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:58,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:58,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 19:22:58,255 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 1 times [2022-03-20 19:22:58,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:58,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503142880] [2022-03-20 19:22:58,256 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 2 times [2022-03-20 19:22:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:58,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297645162] [2022-03-20 19:22:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:58,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:58,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102717134] [2022-03-20 19:22:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:22:58,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:58,269 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:58,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 19:22:58,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:22:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 19:22:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 19:22:58,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 19:22:58,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297645162] [2022-03-20 19:22:58,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102717134] [2022-03-20 19:22:58,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102717134] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:22:58,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:22:58,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-20 19:22:58,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:58,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503142880] [2022-03-20 19:22:58,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503142880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:58,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:58,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:22:58,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262170019] [2022-03-20 19:22:58,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:58,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:22:58,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:22:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:22:58,615 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:22:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:58,646 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-03-20 19:22:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:22:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-03-20 19:22:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:58,647 INFO L225 Difference]: With dead ends: 134 [2022-03-20 19:22:58,647 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 19:22:58,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:22:58,648 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:58,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:22:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 19:22:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 19:22:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 19:22:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2022-03-20 19:22:58,659 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 58 [2022-03-20 19:22:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:58,659 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2022-03-20 19:22:58,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:22:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2022-03-20 19:22:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:22:58,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:58,660 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:58,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:58,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 19:22:58,879 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 5 times [2022-03-20 19:22:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1179647919] [2022-03-20 19:22:58,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 6 times [2022-03-20 19:22:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459661077] [2022-03-20 19:22:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:58,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:58,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99871190] [2022-03-20 19:22:58,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:22:58,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:58,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:58,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 19:22:58,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:22:58,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:58,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 19:22:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 19:22:59,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:22:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 19:22:59,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:22:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459661077] [2022-03-20 19:22:59,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:22:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99871190] [2022-03-20 19:22:59,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99871190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:22:59,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:22:59,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 19:22:59,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:22:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1179647919] [2022-03-20 19:22:59,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1179647919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:22:59,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:22:59,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:22:59,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264313979] [2022-03-20 19:22:59,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:22:59,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:22:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:59,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:22:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:22:59,338 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 19:22:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:22:59,480 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2022-03-20 19:22:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:22:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 19:22:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:22:59,482 INFO L225 Difference]: With dead ends: 163 [2022-03-20 19:22:59,482 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 19:22:59,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:22:59,483 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:22:59,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 293 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:22:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 19:22:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-03-20 19:22:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 19:22:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-03-20 19:22:59,498 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 63 [2022-03-20 19:22:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:22:59,499 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-03-20 19:22:59,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 19:22:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-03-20 19:22:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:22:59,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:22:59,500 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:22:59,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 19:22:59,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 19:22:59,716 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:22:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:22:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 3 times [2022-03-20 19:22:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:22:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291803544] [2022-03-20 19:22:59,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:22:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 4 times [2022-03-20 19:22:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:22:59,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664646706] [2022-03-20 19:22:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:22:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:22:59,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:22:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203183939] [2022-03-20 19:22:59,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:22:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:22:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:22:59,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:22:59,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 19:22:59,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:22:59,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:22:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 19:22:59,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:22:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 19:22:59,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 19:23:00,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:00,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664646706] [2022-03-20 19:23:00,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:00,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203183939] [2022-03-20 19:23:00,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203183939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:00,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:00,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 19:23:00,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:00,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291803544] [2022-03-20 19:23:00,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291803544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:00,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:00,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:23:00,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600365388] [2022-03-20 19:23:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:00,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:23:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:23:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:23:00,123 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 19:23:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:00,229 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2022-03-20 19:23:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:23:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 19:23:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:00,230 INFO L225 Difference]: With dead ends: 185 [2022-03-20 19:23:00,230 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 19:23:00,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:23:00,231 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:00,231 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 251 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:23:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 19:23:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-03-20 19:23:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 19:23:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-03-20 19:23:00,244 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 63 [2022-03-20 19:23:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:00,244 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-03-20 19:23:00,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 19:23:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-03-20 19:23:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 19:23:00,245 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:00,245 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:00,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:00,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 19:23:00,459 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 5 times [2022-03-20 19:23:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539991387] [2022-03-20 19:23:00,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 6 times [2022-03-20 19:23:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:00,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105758074] [2022-03-20 19:23:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:00,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:00,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254218695] [2022-03-20 19:23:00,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:23:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:00,472 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:00,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 19:23:00,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:23:00,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 19:23:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 19:23:00,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 19:23:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105758074] [2022-03-20 19:23:01,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254218695] [2022-03-20 19:23:01,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254218695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:01,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:01,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 19:23:01,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539991387] [2022-03-20 19:23:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539991387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:01,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:23:01,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712289674] [2022-03-20 19:23:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:01,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:23:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:23:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:23:01,005 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:01,167 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-03-20 19:23:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:23:01,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-20 19:23:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:01,169 INFO L225 Difference]: With dead ends: 191 [2022-03-20 19:23:01,169 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 19:23:01,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:23:01,169 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:01,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 205 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:23:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 19:23:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-03-20 19:23:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 19:23:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-03-20 19:23:01,183 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 68 [2022-03-20 19:23:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:01,183 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-03-20 19:23:01,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-03-20 19:23:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 19:23:01,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:01,184 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:01,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:01,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 19:23:01,399 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 3 times [2022-03-20 19:23:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697187519] [2022-03-20 19:23:01,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 4 times [2022-03-20 19:23:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:01,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188107287] [2022-03-20 19:23:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:01,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:01,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017906700] [2022-03-20 19:23:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:23:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:01,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:01,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 19:23:01,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:23:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 19:23:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 19:23:01,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-20 19:23:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188107287] [2022-03-20 19:23:01,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:01,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017906700] [2022-03-20 19:23:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017906700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:01,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:01,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-20 19:23:01,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697187519] [2022-03-20 19:23:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697187519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:01,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:01,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:23:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168824945] [2022-03-20 19:23:01,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:01,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:23:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:01,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:23:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:23:01,918 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:02,088 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-03-20 19:23:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:23:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-20 19:23:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:02,089 INFO L225 Difference]: With dead ends: 197 [2022-03-20 19:23:02,089 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 19:23:02,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:23:02,090 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:02,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:23:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 19:23:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-03-20 19:23:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 19:23:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-03-20 19:23:02,110 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 68 [2022-03-20 19:23:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:02,110 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-03-20 19:23:02,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-03-20 19:23:02,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:23:02,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:02,113 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:02,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:02,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 19:23:02,332 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 7 times [2022-03-20 19:23:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640711330] [2022-03-20 19:23:02,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 8 times [2022-03-20 19:23:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278396254] [2022-03-20 19:23:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:02,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556892535] [2022-03-20 19:23:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:23:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:02,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:02,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 19:23:02,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:23:02,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:02,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 19:23:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:23:02,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:23:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278396254] [2022-03-20 19:23:02,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556892535] [2022-03-20 19:23:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556892535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:02,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:02,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 19:23:02,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640711330] [2022-03-20 19:23:02,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640711330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:02,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:02,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:23:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566057896] [2022-03-20 19:23:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:02,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:23:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:23:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:23:02,919 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:23:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:03,049 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-03-20 19:23:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:23:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-03-20 19:23:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:03,050 INFO L225 Difference]: With dead ends: 222 [2022-03-20 19:23:03,050 INFO L226 Difference]: Without dead ends: 220 [2022-03-20 19:23:03,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:23:03,053 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:03,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:23:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-20 19:23:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-20 19:23:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:23:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 261 transitions. [2022-03-20 19:23:03,071 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 261 transitions. Word has length 81 [2022-03-20 19:23:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:03,071 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 261 transitions. [2022-03-20 19:23:03,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:23:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 261 transitions. [2022-03-20 19:23:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:23:03,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:03,072 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:03,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:03,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:03,289 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 7 times [2022-03-20 19:23:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617421993] [2022-03-20 19:23:03,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 8 times [2022-03-20 19:23:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:03,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632919489] [2022-03-20 19:23:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:03,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:03,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13062830] [2022-03-20 19:23:03,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:23:03,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:03,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:03,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 19:23:03,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:23:03,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 19:23:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 19:23:04,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-20 19:23:05,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:05,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632919489] [2022-03-20 19:23:05,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:05,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13062830] [2022-03-20 19:23:05,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13062830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:05,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:05,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-03-20 19:23:05,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:05,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617421993] [2022-03-20 19:23:05,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617421993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:05,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:05,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:23:05,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931088953] [2022-03-20 19:23:05,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:05,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:23:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:23:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:23:05,074 INFO L87 Difference]: Start difference. First operand 216 states and 261 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 19:23:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:06,086 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-03-20 19:23:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:23:06,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-20 19:23:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:06,088 INFO L225 Difference]: With dead ends: 257 [2022-03-20 19:23:06,088 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 19:23:06,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:23:06,089 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:06,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 307 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 19:23:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 19:23:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2022-03-20 19:23:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 138 states have internal predecessors, (153), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 19:23:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-03-20 19:23:06,115 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 81 [2022-03-20 19:23:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:06,116 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-03-20 19:23:06,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 19:23:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-03-20 19:23:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:23:06,116 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:06,116 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:06,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:06,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 19:23:06,324 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 9 times [2022-03-20 19:23:06,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:06,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1473687763] [2022-03-20 19:23:06,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 10 times [2022-03-20 19:23:06,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:06,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075951922] [2022-03-20 19:23:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:06,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:06,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414335999] [2022-03-20 19:23:06,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:23:06,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:06,336 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:06,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 19:23:06,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:23:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 19:23:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 19:23:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 19:23:07,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075951922] [2022-03-20 19:23:07,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414335999] [2022-03-20 19:23:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414335999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:07,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:07,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 19:23:07,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1473687763] [2022-03-20 19:23:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1473687763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:07,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:07,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:23:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193583662] [2022-03-20 19:23:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:07,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:23:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:23:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:23:07,194 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 19:23:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:07,552 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-03-20 19:23:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:23:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-20 19:23:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:07,554 INFO L225 Difference]: With dead ends: 261 [2022-03-20 19:23:07,554 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 19:23:07,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:23:07,555 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:07,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 302 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 19:23:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2022-03-20 19:23:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 140 states have internal predecessors, (154), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 19:23:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-03-20 19:23:07,581 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 81 [2022-03-20 19:23:07,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:07,581 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-03-20 19:23:07,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-20 19:23:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-03-20 19:23:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:23:07,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:07,582 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:07,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:07,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 19:23:07,795 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 11 times [2022-03-20 19:23:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900930720] [2022-03-20 19:23:07,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 12 times [2022-03-20 19:23:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595997321] [2022-03-20 19:23:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:07,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:07,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:07,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540574960] [2022-03-20 19:23:07,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:23:07,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:07,803 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 19:23:07,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:23:07,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:07,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 19:23:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-20 19:23:08,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595997321] [2022-03-20 19:23:09,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540574960] [2022-03-20 19:23:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540574960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:23:09,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:23:09,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 19:23:09,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900930720] [2022-03-20 19:23:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900930720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:09,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:09,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:23:09,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009227111] [2022-03-20 19:23:09,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:09,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:23:09,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:23:09,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:23:09,386 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:23:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:09,816 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2022-03-20 19:23:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:23:09,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-03-20 19:23:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:09,818 INFO L225 Difference]: With dead ends: 282 [2022-03-20 19:23:09,818 INFO L226 Difference]: Without dead ends: 276 [2022-03-20 19:23:09,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:23:09,819 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:09,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 268 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:23:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-20 19:23:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2022-03-20 19:23:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.119718309859155) internal successors, (159), 147 states have internal predecessors, (159), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 19:23:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-03-20 19:23:09,874 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 81 [2022-03-20 19:23:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:09,874 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-03-20 19:23:09,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:23:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-03-20 19:23:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 19:23:09,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:09,875 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:10,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 19:23:10,092 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 13 times [2022-03-20 19:23:10,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015407613] [2022-03-20 19:23:10,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 14 times [2022-03-20 19:23:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:10,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216684287] [2022-03-20 19:23:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:10,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:10,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457937518] [2022-03-20 19:23:10,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:23:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:10,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:10,100 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:10,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 19:23:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:23:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 19:23:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 19:23:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 19:23:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216684287] [2022-03-20 19:23:10,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457937518] [2022-03-20 19:23:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457937518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:10,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:10,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 19:23:10,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015407613] [2022-03-20 19:23:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015407613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:10,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:10,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:23:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140126537] [2022-03-20 19:23:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:10,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:23:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:23:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:23:10,988 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 19:23:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:11,162 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-03-20 19:23:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:23:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-20 19:23:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:11,167 INFO L225 Difference]: With dead ends: 255 [2022-03-20 19:23:11,167 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 19:23:11,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:23:11,169 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:11,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:23:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 19:23:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-03-20 19:23:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.118881118881119) internal successors, (160), 149 states have internal predecessors, (160), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 19:23:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 278 transitions. [2022-03-20 19:23:11,200 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 278 transitions. Word has length 86 [2022-03-20 19:23:11,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:11,201 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 278 transitions. [2022-03-20 19:23:11,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 19:23:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 278 transitions. [2022-03-20 19:23:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 19:23:11,201 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:11,201 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:11,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:11,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:11,418 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:11,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 15 times [2022-03-20 19:23:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:11,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843848677] [2022-03-20 19:23:11,419 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 16 times [2022-03-20 19:23:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:11,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764072419] [2022-03-20 19:23:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:11,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:11,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545208543] [2022-03-20 19:23:11,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:23:11,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:11,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:11,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 19:23:11,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:23:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 19:23:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:12,660 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:23:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 79 proven. 45 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 19:23:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:23:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764072419] [2022-03-20 19:23:13,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545208543] [2022-03-20 19:23:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545208543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:13,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:13,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 19:23:13,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843848677] [2022-03-20 19:23:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843848677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:13,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:13,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:23:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386306869] [2022-03-20 19:23:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:13,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:23:13,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:23:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:23:13,123 INFO L87 Difference]: Start difference. First operand 236 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 19:23:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:14,166 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2022-03-20 19:23:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:23:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-20 19:23:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:14,168 INFO L225 Difference]: With dead ends: 282 [2022-03-20 19:23:14,168 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 19:23:14,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:23:14,169 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:14,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 379 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 19:23:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 19:23:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-03-20 19:23:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 19:23:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2022-03-20 19:23:14,206 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 86 [2022-03-20 19:23:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:14,207 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2022-03-20 19:23:14,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 19:23:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2022-03-20 19:23:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 19:23:14,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:14,208 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:14,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:14,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:14,421 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 17 times [2022-03-20 19:23:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:14,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443912540] [2022-03-20 19:23:14,421 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 18 times [2022-03-20 19:23:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:14,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287346902] [2022-03-20 19:23:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:14,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:14,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613756289] [2022-03-20 19:23:14,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:23:14,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:14,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:14,428 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 19:23:14,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:23:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 19:23:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-03-20 19:23:23,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:23:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:25,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287346902] [2022-03-20 19:23:25,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:25,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613756289] [2022-03-20 19:23:25,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613756289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:25,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:25,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-20 19:23:25,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443912540] [2022-03-20 19:23:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443912540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:25,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:25,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:23:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961890167] [2022-03-20 19:23:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:25,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:23:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:23:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-03-20 19:23:25,964 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:28,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:31,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:33,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:35,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:37,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:39,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:23:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:39,695 INFO L93 Difference]: Finished difference Result 305 states and 372 transitions. [2022-03-20 19:23:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:23:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2022-03-20 19:23:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:39,697 INFO L225 Difference]: With dead ends: 305 [2022-03-20 19:23:39,697 INFO L226 Difference]: Without dead ends: 287 [2022-03-20 19:23:39,697 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-03-20 19:23:39,698 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:39,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 264 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 335 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2022-03-20 19:23:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-20 19:23:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-20 19:23:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 180 states have internal predecessors, (199), 73 states have call successors, (73), 38 states have call predecessors, (73), 37 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 19:23:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 343 transitions. [2022-03-20 19:23:39,760 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 343 transitions. Word has length 86 [2022-03-20 19:23:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:39,760 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 343 transitions. [2022-03-20 19:23:39,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:23:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 343 transitions. [2022-03-20 19:23:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:23:39,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:39,761 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:39,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:39,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 19:23:39,975 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 9 times [2022-03-20 19:23:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [188936685] [2022-03-20 19:23:39,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 10 times [2022-03-20 19:23:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431307308] [2022-03-20 19:23:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:39,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:39,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821020328] [2022-03-20 19:23:39,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:23:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:39,983 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:39,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 19:23:40,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:23:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:40,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 19:23:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 70 proven. 112 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 19:23:43,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-03-20 19:23:44,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431307308] [2022-03-20 19:23:44,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821020328] [2022-03-20 19:23:44,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821020328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:44,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:44,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 19:23:44,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [188936685] [2022-03-20 19:23:44,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [188936685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:44,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:44,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:23:44,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146207131] [2022-03-20 19:23:44,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:44,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:23:44,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:44,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:23:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:23:44,039 INFO L87 Difference]: Start difference. First operand 287 states and 343 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 19:23:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:44,878 INFO L93 Difference]: Finished difference Result 317 states and 382 transitions. [2022-03-20 19:23:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:23:44,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 99 [2022-03-20 19:23:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:44,882 INFO L225 Difference]: With dead ends: 317 [2022-03-20 19:23:44,882 INFO L226 Difference]: Without dead ends: 315 [2022-03-20 19:23:44,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:23:44,882 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:44,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:23:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-20 19:23:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 311. [2022-03-20 19:23:44,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 191 states have (on average 1.1361256544502618) internal successors, (217), 195 states have internal predecessors, (217), 79 states have call successors, (79), 41 states have call predecessors, (79), 40 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 19:23:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 373 transitions. [2022-03-20 19:23:44,943 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 373 transitions. Word has length 99 [2022-03-20 19:23:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:44,943 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 373 transitions. [2022-03-20 19:23:44,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 19:23:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 373 transitions. [2022-03-20 19:23:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:23:44,944 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:44,944 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:44,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:45,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 19:23:45,151 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 19 times [2022-03-20 19:23:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294340915] [2022-03-20 19:23:45,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 20 times [2022-03-20 19:23:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:45,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835768272] [2022-03-20 19:23:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:45,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:45,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425778912] [2022-03-20 19:23:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:23:45,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:45,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:45,164 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:45,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 19:23:45,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:23:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 19:23:45,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 19:23:47,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 19:23:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835768272] [2022-03-20 19:23:47,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:47,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425778912] [2022-03-20 19:23:47,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425778912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:47,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:47,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 19:23:47,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294340915] [2022-03-20 19:23:47,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294340915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:47,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:47,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:23:47,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079506147] [2022-03-20 19:23:47,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:47,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:23:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:23:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:23:47,672 INFO L87 Difference]: Start difference. First operand 311 states and 373 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 19:23:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:47,972 INFO L93 Difference]: Finished difference Result 352 states and 423 transitions. [2022-03-20 19:23:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:23:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2022-03-20 19:23:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:47,974 INFO L225 Difference]: With dead ends: 352 [2022-03-20 19:23:47,974 INFO L226 Difference]: Without dead ends: 350 [2022-03-20 19:23:47,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:23:47,975 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:47,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:23:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-20 19:23:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2022-03-20 19:23:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 200 states have (on average 1.125) internal successors, (225), 204 states have internal predecessors, (225), 79 states have call successors, (79), 44 states have call predecessors, (79), 43 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 19:23:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 381 transitions. [2022-03-20 19:23:48,033 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 381 transitions. Word has length 99 [2022-03-20 19:23:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:48,033 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 381 transitions. [2022-03-20 19:23:48,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 19:23:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 381 transitions. [2022-03-20 19:23:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:23:48,034 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:48,034 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:48,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:48,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:48,247 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 21 times [2022-03-20 19:23:48,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:48,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392871466] [2022-03-20 19:23:48,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 22 times [2022-03-20 19:23:48,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:48,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134602850] [2022-03-20 19:23:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:48,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:48,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270838047] [2022-03-20 19:23:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:23:48,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:48,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:48,257 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:48,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 19:23:48,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:23:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 19:23:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 19:23:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 19:23:49,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134602850] [2022-03-20 19:23:49,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270838047] [2022-03-20 19:23:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270838047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:23:49,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:23:49,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 19:23:49,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392871466] [2022-03-20 19:23:49,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392871466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:49,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:23:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055449761] [2022-03-20 19:23:49,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:49,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:23:49,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:23:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:23:49,494 INFO L87 Difference]: Start difference. First operand 323 states and 381 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:23:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:50,639 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2022-03-20 19:23:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:23:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 19:23:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:50,641 INFO L225 Difference]: With dead ends: 357 [2022-03-20 19:23:50,641 INFO L226 Difference]: Without dead ends: 355 [2022-03-20 19:23:50,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:23:50,642 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:50,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 371 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 19:23:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-20 19:23:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 334. [2022-03-20 19:23:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 208 states have (on average 1.125) internal successors, (234), 211 states have internal predecessors, (234), 80 states have call successors, (80), 46 states have call predecessors, (80), 45 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-20 19:23:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 392 transitions. [2022-03-20 19:23:50,705 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 392 transitions. Word has length 99 [2022-03-20 19:23:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:50,705 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 392 transitions. [2022-03-20 19:23:50,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:23:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 392 transitions. [2022-03-20 19:23:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:23:50,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:50,706 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:50,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 19:23:50,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:50,913 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:23:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:23:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 23 times [2022-03-20 19:23:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:50,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477282646] [2022-03-20 19:23:50,914 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:23:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 24 times [2022-03-20 19:23:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:23:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168192157] [2022-03-20 19:23:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:23:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:23:50,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:23:50,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146650221] [2022-03-20 19:23:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:23:50,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:23:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:23:50,921 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:23:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 19:23:51,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:23:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:23:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 19:23:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:23:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-20 19:23:52,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:23:55,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:23:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168192157] [2022-03-20 19:23:55,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:23:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146650221] [2022-03-20 19:23:55,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146650221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:23:55,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:23:55,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 19:23:55,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:23:55,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477282646] [2022-03-20 19:23:55,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477282646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:23:55,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:23:55,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:23:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702089524] [2022-03-20 19:23:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:23:55,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:23:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:23:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:23:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=340, Unknown=1, NotChecked=0, Total=420 [2022-03-20 19:23:55,059 INFO L87 Difference]: Start difference. First operand 334 states and 392 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:23:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:23:59,729 INFO L93 Difference]: Finished difference Result 406 states and 494 transitions. [2022-03-20 19:23:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:23:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-20 19:23:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:23:59,731 INFO L225 Difference]: With dead ends: 406 [2022-03-20 19:23:59,731 INFO L226 Difference]: Without dead ends: 400 [2022-03-20 19:23:59,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=115, Invalid=534, Unknown=1, NotChecked=0, Total=650 [2022-03-20 19:23:59,732 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:23:59,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 392 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-20 19:23:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-20 19:23:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 381. [2022-03-20 19:23:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 234 states have (on average 1.1324786324786325) internal successors, (265), 238 states have internal predecessors, (265), 96 states have call successors, (96), 51 states have call predecessors, (96), 50 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 19:23:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2022-03-20 19:23:59,834 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 99 [2022-03-20 19:23:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:23:59,834 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2022-03-20 19:23:59,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:23:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2022-03-20 19:23:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:23:59,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:23:59,835 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:23:59,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:00,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 19:24:00,039 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 25 times [2022-03-20 19:24:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [516958906] [2022-03-20 19:24:00,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 26 times [2022-03-20 19:24:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050418607] [2022-03-20 19:24:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:00,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:00,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:00,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853052803] [2022-03-20 19:24:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:00,047 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:00,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 19:24:00,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:00,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 19:24:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 98 proven. 66 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-20 19:24:02,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 19:24:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050418607] [2022-03-20 19:24:05,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:05,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853052803] [2022-03-20 19:24:05,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853052803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:05,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-20 19:24:05,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [516958906] [2022-03-20 19:24:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [516958906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:05,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:24:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571024736] [2022-03-20 19:24:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:05,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:24:05,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:24:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:24:05,331 INFO L87 Difference]: Start difference. First operand 381 states and 455 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:24:07,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:24:09,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:24:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:10,686 INFO L93 Difference]: Finished difference Result 421 states and 507 transitions. [2022-03-20 19:24:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:24:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 19:24:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:10,689 INFO L225 Difference]: With dead ends: 421 [2022-03-20 19:24:10,689 INFO L226 Difference]: Without dead ends: 419 [2022-03-20 19:24:10,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:24:10,689 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:10,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 372 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-03-20 19:24:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-20 19:24:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 395. [2022-03-20 19:24:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 243 states have (on average 1.131687242798354) internal successors, (275), 247 states have internal predecessors, (275), 99 states have call successors, (99), 53 states have call predecessors, (99), 52 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-20 19:24:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-03-20 19:24:10,783 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 99 [2022-03-20 19:24:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:10,783 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-03-20 19:24:10,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:24:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-03-20 19:24:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:24:10,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:10,784 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:10,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:10,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 19:24:10,995 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 27 times [2022-03-20 19:24:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:10,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26933913] [2022-03-20 19:24:10,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 28 times [2022-03-20 19:24:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:10,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297052503] [2022-03-20 19:24:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:11,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:11,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581934643] [2022-03-20 19:24:11,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:11,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:11,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:11,032 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:11,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 19:24:11,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 19:24:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 19:24:11,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-20 19:24:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:12,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297052503] [2022-03-20 19:24:12,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:12,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581934643] [2022-03-20 19:24:12,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581934643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:12,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:12,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 19:24:12,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26933913] [2022-03-20 19:24:12,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26933913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:12,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:12,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:24:12,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982778303] [2022-03-20 19:24:12,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:12,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:24:12,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:24:12,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:24:12,073 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:24:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:14,438 INFO L93 Difference]: Finished difference Result 427 states and 517 transitions. [2022-03-20 19:24:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:24:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-20 19:24:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:14,440 INFO L225 Difference]: With dead ends: 427 [2022-03-20 19:24:14,440 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 19:24:14,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:24:14,441 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:14,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 19:24:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 19:24:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 408. [2022-03-20 19:24:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 250 states have (on average 1.132) internal successors, (283), 255 states have internal predecessors, (283), 104 states have call successors, (104), 54 states have call predecessors, (104), 53 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 19:24:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 489 transitions. [2022-03-20 19:24:14,553 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 489 transitions. Word has length 99 [2022-03-20 19:24:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:14,554 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 489 transitions. [2022-03-20 19:24:14,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:24:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 489 transitions. [2022-03-20 19:24:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:24:14,555 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:14,555 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:14,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:14,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 19:24:14,771 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 29 times [2022-03-20 19:24:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310152514] [2022-03-20 19:24:14,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 30 times [2022-03-20 19:24:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078711399] [2022-03-20 19:24:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:14,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:14,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482437660] [2022-03-20 19:24:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:14,779 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:14,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 19:24:14,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:24:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 19:24:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-20 19:24:15,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-20 19:24:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:22,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078711399] [2022-03-20 19:24:22,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:22,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482437660] [2022-03-20 19:24:22,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482437660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:22,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:22,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 19:24:22,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:22,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310152514] [2022-03-20 19:24:22,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310152514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:22,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:22,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:24:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751643735] [2022-03-20 19:24:22,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:22,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:24:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:24:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=162, Unknown=1, NotChecked=0, Total=210 [2022-03-20 19:24:22,712 INFO L87 Difference]: Start difference. First operand 408 states and 489 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:24,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:24:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:25,347 INFO L93 Difference]: Finished difference Result 465 states and 564 transitions. [2022-03-20 19:24:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:24:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-20 19:24:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:25,352 INFO L225 Difference]: With dead ends: 465 [2022-03-20 19:24:25,352 INFO L226 Difference]: Without dead ends: 463 [2022-03-20 19:24:25,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2022-03-20 19:24:25,353 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:25,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 199 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 19:24:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-20 19:24:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 394. [2022-03-20 19:24:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 241 states have (on average 1.1244813278008299) internal successors, (271), 249 states have internal predecessors, (271), 100 states have call successors, (100), 53 states have call predecessors, (100), 52 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 19:24:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 469 transitions. [2022-03-20 19:24:25,456 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 469 transitions. Word has length 99 [2022-03-20 19:24:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:25,456 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 469 transitions. [2022-03-20 19:24:25,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 469 transitions. [2022-03-20 19:24:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 19:24:25,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:25,457 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:25,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:25,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 19:24:25,671 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 31 times [2022-03-20 19:24:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351048620] [2022-03-20 19:24:25,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 32 times [2022-03-20 19:24:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665360846] [2022-03-20 19:24:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:25,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:25,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371871251] [2022-03-20 19:24:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:25,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:25,678 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:25,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 19:24:25,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:25,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 19:24:25,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 19:24:26,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 19:24:26,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665360846] [2022-03-20 19:24:26,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:26,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371871251] [2022-03-20 19:24:26,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371871251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:26,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:26,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 19:24:26,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:26,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351048620] [2022-03-20 19:24:26,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351048620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:26,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:26,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:24:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495304119] [2022-03-20 19:24:26,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:26,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:24:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:24:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:24:26,374 INFO L87 Difference]: Start difference. First operand 394 states and 469 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 19:24:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:26,674 INFO L93 Difference]: Finished difference Result 420 states and 506 transitions. [2022-03-20 19:24:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:24:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-03-20 19:24:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:26,676 INFO L225 Difference]: With dead ends: 420 [2022-03-20 19:24:26,676 INFO L226 Difference]: Without dead ends: 414 [2022-03-20 19:24:26,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:24:26,679 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 8 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:26,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 357 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:24:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-03-20 19:24:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 391. [2022-03-20 19:24:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 240 states have (on average 1.125) internal successors, (270), 247 states have internal predecessors, (270), 98 states have call successors, (98), 53 states have call predecessors, (98), 52 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 19:24:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 464 transitions. [2022-03-20 19:24:26,786 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 464 transitions. Word has length 104 [2022-03-20 19:24:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:26,786 INFO L478 AbstractCegarLoop]: Abstraction has 391 states and 464 transitions. [2022-03-20 19:24:26,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-20 19:24:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 464 transitions. [2022-03-20 19:24:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 19:24:26,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:26,787 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:26,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 19:24:27,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 19:24:27,004 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 33 times [2022-03-20 19:24:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1482943479] [2022-03-20 19:24:27,004 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 34 times [2022-03-20 19:24:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:27,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714823187] [2022-03-20 19:24:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:27,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:27,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593547907] [2022-03-20 19:24:27,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:27,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:27,011 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:27,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 19:24:27,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 19:24:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 104 proven. 114 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-20 19:24:28,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-20 19:24:28,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714823187] [2022-03-20 19:24:28,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593547907] [2022-03-20 19:24:28,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593547907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:28,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:28,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2022-03-20 19:24:28,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1482943479] [2022-03-20 19:24:28,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1482943479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:28,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:28,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:24:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140742831] [2022-03-20 19:24:28,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:28,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:24:28,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:24:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:24:28,470 INFO L87 Difference]: Start difference. First operand 391 states and 464 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 19:24:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:29,725 INFO L93 Difference]: Finished difference Result 431 states and 523 transitions. [2022-03-20 19:24:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:24:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 104 [2022-03-20 19:24:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:29,728 INFO L225 Difference]: With dead ends: 431 [2022-03-20 19:24:29,728 INFO L226 Difference]: Without dead ends: 419 [2022-03-20 19:24:29,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:24:29,729 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:29,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 387 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 686 Invalid, 0 Unknown, 27 Unchecked, 1.0s Time] [2022-03-20 19:24:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-20 19:24:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 395. [2022-03-20 19:24:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 242 states have (on average 1.128099173553719) internal successors, (273), 248 states have internal predecessors, (273), 100 states have call successors, (100), 53 states have call predecessors, (100), 52 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 19:24:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2022-03-20 19:24:29,846 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 104 [2022-03-20 19:24:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:29,846 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2022-03-20 19:24:29,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-20 19:24:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2022-03-20 19:24:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 19:24:29,847 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:29,847 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:29,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:30,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:30,059 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 35 times [2022-03-20 19:24:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114831773] [2022-03-20 19:24:30,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 36 times [2022-03-20 19:24:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643711766] [2022-03-20 19:24:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:30,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:30,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:30,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158697787] [2022-03-20 19:24:30,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:30,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:30,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:24:30,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 19:24:30,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:24:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 19:24:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:13,936 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:36:24,966 WARN L833 $PredicateComparison]: unable to prove that (and (exists ((v_main_~y~0_BEFORE_CALL_395 Int) (aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165 Int) (aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95 Int) (v_main_~x~0_BEFORE_CALL_435 Int) (aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117 Int) (aux_div_v_main_~q~0_BEFORE_CALL_355_51 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141 Int) (aux_div_v_main_~s~0_BEFORE_CALL_340_55 Int) (aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117 Int) (aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165 Int) (aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95 Int)) (let ((.cse2 (+ (* aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117 v_main_~y~0_BEFORE_CALL_395 2) (* (- 2) v_main_~y~0_BEFORE_CALL_395 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165) (* (- 1) v_main_~y~0_BEFORE_CALL_395 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165)))) (let ((.cse5 (* aux_div_v_main_~s~0_BEFORE_CALL_340_55 2)) (.cse4 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141 2)) (.cse1 (+ (* 2 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165) aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165)) (.cse0 (* 2 aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95)) (.cse3 (div .cse2 v_main_~x~0_BEFORE_CALL_435))) (and (<= .cse0 .cse1) (<= (* aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117 2) .cse1) (< aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165 2) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165) (<= (+ (* 2 (* aux_div_v_main_~q~0_BEFORE_CALL_355_51 v_main_~x~0_BEFORE_CALL_435)) v_main_~y~0_BEFORE_CALL_395 (* 2 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141 v_main_~y~0_BEFORE_CALL_395))) v_main_~x~0_BEFORE_CALL_435) (= (mod .cse2 v_main_~x~0_BEFORE_CALL_435) 0) (< .cse3 2) (< .cse1 (+ 2 .cse4)) (< .cse1 (+ .cse5 2)) (< 0 (+ (* v_main_~x~0_BEFORE_CALL_435 aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95) (* v_main_~y~0_BEFORE_CALL_395 aux_div_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95))) (<= 1 v_main_~y~0_BEFORE_CALL_395) (<= .cse5 .cse1) (<= .cse4 .cse1) (not (= (+ (* 2 (* v_main_~y~0_BEFORE_CALL_395 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165)) v_main_~y~0_BEFORE_CALL_395 (* 2 (* aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117 v_main_~x~0_BEFORE_CALL_435))) v_main_~x~0_BEFORE_CALL_435)) (exists ((aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141 Int) (aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_165 Int)) (let ((.cse9 (div (+ (* aux_div_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117 v_main_~y~0_BEFORE_CALL_395 2) (* (- 2) v_main_~y~0_BEFORE_CALL_395 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165) (* (- 1) v_main_~y~0_BEFORE_CALL_395 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165)) v_main_~x~0_BEFORE_CALL_435))) (let ((.cse8 (* 2 aux_div_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95)) (.cse7 (* aux_div_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117 2)) (.cse10 (* aux_div_v_main_~q~0_BEFORE_CALL_355_51 2)) (.cse6 (+ .cse9 (* aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_165 2)))) (and (< .cse6 (+ .cse7 2)) (<= .cse8 .cse6) (<= (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141) .cse6) (< .cse6 (+ .cse8 2)) (<= .cse7 .cse6) (= (+ aux_div_v_main_~s~0_BEFORE_CALL_340_55 1) (+ (* (* aux_div_v_main_~s~0_BEFORE_CALL_340_55 aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141_165) 2) (* (+ (- 1) (* (- 2) aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165) (* (- 1) aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~s~0_BEFORE_CALL_340_55_95_117_141_165)) aux_div_aux_mod_aux_mod_aux_mod_v_main_~q~0_BEFORE_CALL_355_51_95_117_141) (* aux_div_v_main_~s~0_BEFORE_CALL_340_55 .cse9))) (< .cse6 (+ 2 .cse10)) (<= .cse10 .cse6))))) (< .cse1 (+ .cse0 2)) (<= 0 .cse3))))) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2022-03-20 19:36:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 127 proven. 49 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-20 19:36:25,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:36:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-03-20 19:36:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:36:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643711766] [2022-03-20 19:36:26,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:36:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158697787] [2022-03-20 19:36:26,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158697787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:36:26,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:36:26,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2022-03-20 19:36:26,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:36:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114831773] [2022-03-20 19:36:26,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114831773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:36:26,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:36:26,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:36:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008852362] [2022-03-20 19:36:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:36:26,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:36:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:36:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:36:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=403, Unknown=2, NotChecked=42, Total=552 [2022-03-20 19:36:26,365 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 19:36:29,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:37:06,405 WARN L232 SmtUtils]: Spent 36.34s on a formula simplification. DAG size of input: 62 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)