/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:13:55,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:13:55,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:13:55,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 01:13:55,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:13:55,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:13:55,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:13:55,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:13:55,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:13:55,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:13:55,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:13:55,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:13:55,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:13:55,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:13:55,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:13:55,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:13:55,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:13:55,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:13:55,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:13:55,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:13:55,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:13:55,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:13:55,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:13:55,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:13:55,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:13:55,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:13:55,967 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:13:55,967 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:13:55,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:13:55,968 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:13:55,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:13:56,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:13:56,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:13:56,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:13:56,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:13:56,212 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:13:56,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 01:13:56,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a1375991/4b9bdaaf761f40c2ab6796633883765e/FLAGb4fadddc9 [2022-03-18 01:13:56,697 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:13:56,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-18 01:13:56,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a1375991/4b9bdaaf761f40c2ab6796633883765e/FLAGb4fadddc9 [2022-03-18 01:13:57,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a1375991/4b9bdaaf761f40c2ab6796633883765e [2022-03-18 01:13:57,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:13:57,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:13:57,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:13:57,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:13:57,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:13:57,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c8587fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57, skipping insertion in model container [2022-03-18 01:13:57,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:13:57,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:13:57,262 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/egcd3-ll.c[490,503] [2022-03-18 01:13:57,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:13:57,308 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:13:57,318 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/egcd3-ll.c[490,503] [2022-03-18 01:13:57,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:13:57,336 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:13:57,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57 WrapperNode [2022-03-18 01:13:57,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:13:57,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:13:57,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:13:57,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:13:57,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:13:57,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:13:57,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:13:57,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:13:57,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (1/1) ... [2022-03-18 01:13:57,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:13:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:57,437 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) [2022-03-18 01:13:57,439 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 [2022-03-18 01:13:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:13:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:13:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:13:57,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:13:57,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:13:57,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:13:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:13:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:13:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:13:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:13:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:13:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:13:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:13:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:13:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:13:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:13:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:13:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:13:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:13:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:13:57,548 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:13:57,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:13:57,747 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:13:57,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:13:57,753 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 01:13:57,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:57 BoogieIcfgContainer [2022-03-18 01:13:57,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:13:57,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:13:57,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:13:57,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:13:57,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:13:57" (1/3) ... [2022-03-18 01:13:57,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b26fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:57, skipping insertion in model container [2022-03-18 01:13:57,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:13:57" (2/3) ... [2022-03-18 01:13:57,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b26fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:13:57, skipping insertion in model container [2022-03-18 01:13:57,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:13:57" (3/3) ... [2022-03-18 01:13:57,781 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-03-18 01:13:57,785 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:13:57,785 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:13:57,839 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:13:57,844 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 [2022-03-18 01:13:57,845 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:13:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 01:13:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 01:13:57,863 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:57,864 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:57,864 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:57,878 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-03-18 01:13:57,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:57,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952932227] [2022-03-18 01:13:57,899 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 2 times [2022-03-18 01:13:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:57,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470129184] [2022-03-18 01:13:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:57,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:13:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:58,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:13:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:13:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:13:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:58,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470129184] [2022-03-18 01:13:58,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470129184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:58,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:58,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:13:58,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:58,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952932227] [2022-03-18 01:13:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952932227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:58,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:58,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:13:58,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470950320] [2022-03-18 01:13:58,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:58,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 01:13:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 01:13:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:13:58,172 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:13:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:58,251 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-18 01:13:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 01:13:58,254 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 [2022-03-18 01:13:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:58,262 INFO L225 Difference]: With dead ends: 67 [2022-03-18 01:13:58,262 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 01:13:58,266 INFO L911 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 [2022-03-18 01:13:58,272 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:58,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:13:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 01:13:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 01:13:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 01:13:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-18 01:13:58,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-18 01:13:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:58,309 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-18 01:13:58,310 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) [2022-03-18 01:13:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-18 01:13:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 01:13:58,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:58,312 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:58,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:13:58,313 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-03-18 01:13:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:58,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382167417] [2022-03-18 01:13:58,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 2 times [2022-03-18 01:13:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:58,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613511414] [2022-03-18 01:13:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:58,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:58,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192881084] [2022-03-18 01:13:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:58,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:58,335 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) [2022-03-18 01:13:58,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:13:58,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:13:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 01:13:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:13:58,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:13:58,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:58,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613511414] [2022-03-18 01:13:58,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:58,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192881084] [2022-03-18 01:13:58,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192881084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:58,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:58,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:13:58,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:58,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382167417] [2022-03-18 01:13:58,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382167417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:58,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:58,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:13:58,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87499644] [2022-03-18 01:13:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:58,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:13:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:13:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:13:58,679 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 01:13:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:58,784 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-18 01:13:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:13:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 01:13:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:58,788 INFO L225 Difference]: With dead ends: 51 [2022-03-18 01:13:58,788 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 01:13:58,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:13:58,791 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:58,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 162 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 01:13:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-18 01:13:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 01:13:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-18 01:13:58,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-03-18 01:13:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:58,818 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-18 01:13:58,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 01:13:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-18 01:13:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 01:13:58,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:58,820 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:58,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:59,046 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 [2022-03-18 01:13:59,046 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-03-18 01:13:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057649333] [2022-03-18 01:13:59,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 2 times [2022-03-18 01:13:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:59,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256544971] [2022-03-18 01:13:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:59,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829755009] [2022-03-18 01:13:59,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:59,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:59,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:59,066 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) [2022-03-18 01:13:59,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 01:13:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:59,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:13:59,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:13:59,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:13:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256544971] [2022-03-18 01:13:59,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:59,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829755009] [2022-03-18 01:13:59,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829755009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:59,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 01:13:59,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:59,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057649333] [2022-03-18 01:13:59,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057649333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:59,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:59,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:13:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438256702] [2022-03-18 01:13:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:59,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:13:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:13:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:13:59,390 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:13:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:59,538 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-18 01:13:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:13:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-18 01:13:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:59,541 INFO L225 Difference]: With dead ends: 100 [2022-03-18 01:13:59,541 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 01:13:59,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:13:59,551 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:59,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 259 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:13:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 01:13:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-18 01:13:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 01:13:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-18 01:13:59,572 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-18 01:13:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:59,572 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-18 01:13:59,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:13:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-18 01:13:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 01:13:59,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:59,573 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:59,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:59,795 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 [2022-03-18 01:13:59,796 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-03-18 01:13:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:59,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2059620987] [2022-03-18 01:13:59,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 2 times [2022-03-18 01:13:59,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:59,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902675217] [2022-03-18 01:13:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:59,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:59,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:59,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776177468] [2022-03-18 01:13:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:59,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:59,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:59,812 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) [2022-03-18 01:13:59,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 01:13:59,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:59,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 01:13:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:14:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:14:00,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902675217] [2022-03-18 01:14:00,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776177468] [2022-03-18 01:14:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776177468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:00,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:00,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-03-18 01:14:00,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2059620987] [2022-03-18 01:14:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2059620987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:00,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:00,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:14:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559154495] [2022-03-18 01:14:00,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:00,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:14:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:14:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:14:00,281 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:14:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:00,475 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2022-03-18 01:14:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:14:00,476 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-18 01:14:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:00,477 INFO L225 Difference]: With dead ends: 115 [2022-03-18 01:14:00,477 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 01:14:00,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:14:00,478 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:00,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 339 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:14:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 01:14:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-18 01:14:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:14:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-18 01:14:00,503 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-18 01:14:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:00,504 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-18 01:14:00,504 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:14:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-18 01:14:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 01:14:00,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:00,505 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:00,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:00,728 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 [2022-03-18 01:14:00,728 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-03-18 01:14:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133844550] [2022-03-18 01:14:00,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 2 times [2022-03-18 01:14:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:00,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508646848] [2022-03-18 01:14:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:00,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780802264] [2022-03-18 01:14:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:00,748 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) [2022-03-18 01:14:00,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 01:14:00,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 01:14:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 01:14:00,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:14:00,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:00,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508646848] [2022-03-18 01:14:00,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:00,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780802264] [2022-03-18 01:14:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780802264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:00,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:00,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:14:00,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133844550] [2022-03-18 01:14:00,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133844550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:00,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:00,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:14:00,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055661558] [2022-03-18 01:14:00,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:00,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:14:00,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:14:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:14:00,945 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:14:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:01,114 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-18 01:14:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:14:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-18 01:14:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:01,116 INFO L225 Difference]: With dead ends: 115 [2022-03-18 01:14:01,116 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 01:14:01,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:14:01,117 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:01,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 214 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:14:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 01:14:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-18 01:14:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 01:14:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-03-18 01:14:01,139 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2022-03-18 01:14:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:01,139 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-03-18 01:14:01,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:14:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-03-18 01:14:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 01:14:01,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:01,140 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:01,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:01,363 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 [2022-03-18 01:14:01,363 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-03-18 01:14:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333991581] [2022-03-18 01:14:01,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 2 times [2022-03-18 01:14:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802373477] [2022-03-18 01:14:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:01,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:01,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008333851] [2022-03-18 01:14:01,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:01,380 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) [2022-03-18 01:14:01,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 01:14:01,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:01,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 01:14:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:14:01,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:14:01,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:01,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802373477] [2022-03-18 01:14:01,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:01,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008333851] [2022-03-18 01:14:01,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008333851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:01,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:01,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 01:14:01,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:01,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333991581] [2022-03-18 01:14:01,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333991581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:01,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:01,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:14:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970697966] [2022-03-18 01:14:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:01,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:14:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:14:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:14:01,840 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 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) [2022-03-18 01:14:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:02,016 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-03-18 01:14:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:14:02,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 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 36 [2022-03-18 01:14:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:02,018 INFO L225 Difference]: With dead ends: 121 [2022-03-18 01:14:02,018 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 01:14:02,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:14:02,019 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:02,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 304 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:14:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 01:14:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-18 01:14:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 79 states have internal predecessors, (97), 29 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 01:14:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2022-03-18 01:14:02,037 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2022-03-18 01:14:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:02,037 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2022-03-18 01:14:02,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 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) [2022-03-18 01:14:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2022-03-18 01:14:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 01:14:02,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:02,038 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:02,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:02,261 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 [2022-03-18 01:14:02,261 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 3 times [2022-03-18 01:14:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:02,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371755775] [2022-03-18 01:14:02,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 4 times [2022-03-18 01:14:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:02,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133251675] [2022-03-18 01:14:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:02,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882032025] [2022-03-18 01:14:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:02,277 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) [2022-03-18 01:14:02,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 01:14:02,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 01:14:02,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:14:02,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:14:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:02,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133251675] [2022-03-18 01:14:02,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882032025] [2022-03-18 01:14:02,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882032025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:02,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:02,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:02,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:02,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371755775] [2022-03-18 01:14:02,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371755775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:02,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:02,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824678290] [2022-03-18 01:14:02,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:02,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:14:02,368 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-18 01:14:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:02,436 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-03-18 01:14:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:14:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 36 [2022-03-18 01:14:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:02,439 INFO L225 Difference]: With dead ends: 165 [2022-03-18 01:14:02,439 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 01:14:02,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 01:14:02,441 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:02,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 01:14:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-03-18 01:14:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:14:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-03-18 01:14:02,457 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2022-03-18 01:14:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:02,457 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-03-18 01:14:02,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-18 01:14:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-03-18 01:14:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 01:14:02,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:02,458 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:02,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:02,675 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 [2022-03-18 01:14:02,675 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-03-18 01:14:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:02,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411387074] [2022-03-18 01:14:02,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 2 times [2022-03-18 01:14:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:02,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333663246] [2022-03-18 01:14:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:02,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:02,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660612286] [2022-03-18 01:14:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:02,688 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) [2022-03-18 01:14:02,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 01:14:02,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:02,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:02,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:14:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 01:14:02,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:14:02,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333663246] [2022-03-18 01:14:02,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660612286] [2022-03-18 01:14:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660612286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:02,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:02,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:02,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411387074] [2022-03-18 01:14:02,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411387074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:02,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:02,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:02,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30166299] [2022-03-18 01:14:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:02,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:14:02,810 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:14:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:02,868 INFO L93 Difference]: Finished difference Result 151 states and 206 transitions. [2022-03-18 01:14:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:14:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-18 01:14:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:02,888 INFO L225 Difference]: With dead ends: 151 [2022-03-18 01:14:02,888 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 01:14:02,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:14:02,889 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:02,889 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 01:14:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2022-03-18 01:14:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 81 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 01:14:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2022-03-18 01:14:02,907 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2022-03-18 01:14:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:02,908 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2022-03-18 01:14:02,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:14:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2022-03-18 01:14:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 01:14:02,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:02,909 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:02,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:03,132 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 [2022-03-18 01:14:03,133 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 1 times [2022-03-18 01:14:03,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977764494] [2022-03-18 01:14:03,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 2 times [2022-03-18 01:14:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:03,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218401616] [2022-03-18 01:14:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:03,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:03,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877319200] [2022-03-18 01:14:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:03,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:03,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:03,148 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) [2022-03-18 01:14:03,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 01:14:03,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:03,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:03,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 01:14:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 01:14:03,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 01:14:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218401616] [2022-03-18 01:14:03,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877319200] [2022-03-18 01:14:03,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877319200] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:03,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:03,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-03-18 01:14:03,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977764494] [2022-03-18 01:14:03,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977764494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:03,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:03,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:03,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666250977] [2022-03-18 01:14:03,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:03,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:14:03,420 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (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) [2022-03-18 01:14:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:03,481 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-03-18 01:14:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:14:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (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 41 [2022-03-18 01:14:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:03,484 INFO L225 Difference]: With dead ends: 173 [2022-03-18 01:14:03,484 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 01:14:03,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:14:03,485 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:03,485 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 01:14:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-18 01:14:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-18 01:14:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-03-18 01:14:03,513 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 41 [2022-03-18 01:14:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:03,513 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-03-18 01:14:03,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (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) [2022-03-18 01:14:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-03-18 01:14:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 01:14:03,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:03,515 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:03,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:03,727 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 [2022-03-18 01:14:03,728 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-03-18 01:14:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514131079] [2022-03-18 01:14:03,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 2 times [2022-03-18 01:14:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737723887] [2022-03-18 01:14:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:03,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:03,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396383633] [2022-03-18 01:14:03,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:03,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:03,740 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) [2022-03-18 01:14:03,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 01:14:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 01:14:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 01:14:04,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 01:14:05,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:05,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737723887] [2022-03-18 01:14:05,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396383633] [2022-03-18 01:14:05,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396383633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:05,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:05,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-18 01:14:05,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514131079] [2022-03-18 01:14:05,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514131079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:05,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:05,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:14:05,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853783146] [2022-03-18 01:14:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:05,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:14:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:05,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:14:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:14:05,142 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:14:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:05,586 INFO L93 Difference]: Finished difference Result 230 states and 330 transitions. [2022-03-18 01:14:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-03-18 01:14:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:05,591 INFO L225 Difference]: With dead ends: 230 [2022-03-18 01:14:05,591 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 01:14:05,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-18 01:14:05,592 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:05,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 342 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:14:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 01:14:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-18 01:14:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 117 states have (on average 1.188034188034188) internal successors, (139), 128 states have internal predecessors, (139), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 81 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-18 01:14:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 323 transitions. [2022-03-18 01:14:05,635 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 323 transitions. Word has length 53 [2022-03-18 01:14:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:05,635 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 323 transitions. [2022-03-18 01:14:05,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:14:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 323 transitions. [2022-03-18 01:14:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 01:14:05,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:05,637 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:05,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:05,843 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 [2022-03-18 01:14:05,843 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 3 times [2022-03-18 01:14:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:05,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1870345244] [2022-03-18 01:14:05,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 4 times [2022-03-18 01:14:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813548490] [2022-03-18 01:14:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:05,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:05,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858888032] [2022-03-18 01:14:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:05,865 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) [2022-03-18 01:14:05,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 01:14:05,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 01:14:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 01:14:06,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 01:14:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813548490] [2022-03-18 01:14:06,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858888032] [2022-03-18 01:14:06,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858888032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:06,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:06,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-18 01:14:06,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1870345244] [2022-03-18 01:14:06,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1870345244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:06,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:06,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:14:06,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795554268] [2022-03-18 01:14:06,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:06,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:14:06,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:14:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:14:06,139 INFO L87 Difference]: Start difference. First operand 224 states and 323 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:06,456 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2022-03-18 01:14:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:14:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2022-03-18 01:14:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:06,460 INFO L225 Difference]: With dead ends: 335 [2022-03-18 01:14:06,460 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 01:14:06,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:14:06,461 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:06,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 359 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:14:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 01:14:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 243. [2022-03-18 01:14:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 143 states have internal predecessors, (166), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-18 01:14:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 350 transitions. [2022-03-18 01:14:06,505 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 350 transitions. Word has length 58 [2022-03-18 01:14:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:06,505 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 350 transitions. [2022-03-18 01:14:06,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 350 transitions. [2022-03-18 01:14:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:14:06,506 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:06,506 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:06,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:06,720 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 [2022-03-18 01:14:06,721 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-03-18 01:14:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:06,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859025584] [2022-03-18 01:14:06,722 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:06,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 2 times [2022-03-18 01:14:06,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:06,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916070129] [2022-03-18 01:14:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:06,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:06,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285811789] [2022-03-18 01:14:06,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:06,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:06,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:06,737 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) [2022-03-18 01:14:06,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 01:14:06,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 01:14:06,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-18 01:14:06,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-18 01:14:07,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916070129] [2022-03-18 01:14:07,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285811789] [2022-03-18 01:14:07,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285811789] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:07,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:07,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-18 01:14:07,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:07,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859025584] [2022-03-18 01:14:07,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859025584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:07,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:07,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842282560] [2022-03-18 01:14:07,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:07,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:14:07,137 INFO L87 Difference]: Start difference. First operand 243 states and 350 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:07,211 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-03-18 01:14:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:14:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-03-18 01:14:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:07,213 INFO L225 Difference]: With dead ends: 249 [2022-03-18 01:14:07,213 INFO L226 Difference]: Without dead ends: 247 [2022-03-18 01:14:07,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:14:07,214 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:07,214 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-18 01:14:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-18 01:14:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 146 states have internal predecessors, (169), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-18 01:14:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 353 transitions. [2022-03-18 01:14:07,259 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 353 transitions. Word has length 63 [2022-03-18 01:14:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:07,260 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 353 transitions. [2022-03-18 01:14:07,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 353 transitions. [2022-03-18 01:14:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 01:14:07,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:07,261 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:07,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:07,483 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 [2022-03-18 01:14:07,483 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 1 times [2022-03-18 01:14:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:07,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462142790] [2022-03-18 01:14:07,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 2 times [2022-03-18 01:14:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:07,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108322758] [2022-03-18 01:14:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:07,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:07,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:07,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38302696] [2022-03-18 01:14:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:07,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:07,496 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) [2022-03-18 01:14:07,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 01:14:07,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 01:14:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-18 01:14:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-18 01:14:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108322758] [2022-03-18 01:14:07,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38302696] [2022-03-18 01:14:07,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38302696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:07,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:07,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 01:14:07,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:07,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462142790] [2022-03-18 01:14:07,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462142790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:07,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:07,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:14:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429827396] [2022-03-18 01:14:07,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:07,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:14:07,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:07,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:14:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:14:07,845 INFO L87 Difference]: Start difference. First operand 247 states and 353 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:08,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:08,087 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2022-03-18 01:14:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:14:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-03-18 01:14:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:08,089 INFO L225 Difference]: With dead ends: 261 [2022-03-18 01:14:08,089 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 01:14:08,090 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:14:08,090 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:08,090 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 141 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:14:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 01:14:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-18 01:14:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 148 states have (on average 1.2027027027027026) internal successors, (178), 155 states have internal predecessors, (178), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-18 01:14:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-03-18 01:14:08,140 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 61 [2022-03-18 01:14:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:08,140 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-03-18 01:14:08,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 01:14:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-03-18 01:14:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 01:14:08,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:08,141 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:08,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:08,362 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 [2022-03-18 01:14:08,363 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 3 times [2022-03-18 01:14:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:08,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1916379273] [2022-03-18 01:14:08,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 4 times [2022-03-18 01:14:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948873847] [2022-03-18 01:14:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:08,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254824588] [2022-03-18 01:14:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:08,373 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) [2022-03-18 01:14:08,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 01:14:08,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 01:14:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 01:14:08,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:14:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948873847] [2022-03-18 01:14:08,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254824588] [2022-03-18 01:14:08,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254824588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:08,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:08,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:08,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:08,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1916379273] [2022-03-18 01:14:08,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1916379273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:08,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:08,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:14:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869232234] [2022-03-18 01:14:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:08,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:14:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:14:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:14:08,542 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 01:14:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:08,644 INFO L93 Difference]: Finished difference Result 445 states and 620 transitions. [2022-03-18 01:14:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 01:14:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-18 01:14:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:08,647 INFO L225 Difference]: With dead ends: 445 [2022-03-18 01:14:08,647 INFO L226 Difference]: Without dead ends: 270 [2022-03-18 01:14:08,648 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:14:08,648 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:08,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:14:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-18 01:14:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 250. [2022-03-18 01:14:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 148 states have internal predecessors, (176), 85 states have call successors, (85), 18 states have call predecessors, (85), 17 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 01:14:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-03-18 01:14:08,717 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 66 [2022-03-18 01:14:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:08,717 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-03-18 01:14:08,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 01:14:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-03-18 01:14:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 01:14:08,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:08,718 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:08,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:08,933 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 [2022-03-18 01:14:08,934 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 5 times [2022-03-18 01:14:08,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:08,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027610245] [2022-03-18 01:14:08,934 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 6 times [2022-03-18 01:14:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:08,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374404147] [2022-03-18 01:14:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:08,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:08,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465103569] [2022-03-18 01:14:08,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:14:08,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:08,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:08,944 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) [2022-03-18 01:14:08,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 01:14:09,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:14:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 01:14:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:09,697 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 01:14:09,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:11,043 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 01:14:14,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374404147] [2022-03-18 01:14:14,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465103569] [2022-03-18 01:14:14,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465103569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:14,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:14,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-18 01:14:14,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027610245] [2022-03-18 01:14:14,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027610245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:14,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:14,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:14:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642998531] [2022-03-18 01:14:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:14,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:14:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:14:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-18 01:14:14,790 INFO L87 Difference]: Start difference. First operand 250 states and 344 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-03-18 01:14:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:15,917 INFO L93 Difference]: Finished difference Result 321 states and 431 transitions. [2022-03-18 01:14:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:14:15,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 66 [2022-03-18 01:14:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:15,920 INFO L225 Difference]: With dead ends: 321 [2022-03-18 01:14:15,920 INFO L226 Difference]: Without dead ends: 319 [2022-03-18 01:14:15,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 01:14:15,924 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:15,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 454 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:14:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-18 01:14:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-03-18 01:14:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 182 states have internal predecessors, (215), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-18 01:14:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2022-03-18 01:14:15,983 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2022-03-18 01:14:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:15,983 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2022-03-18 01:14:15,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-03-18 01:14:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2022-03-18 01:14:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 01:14:15,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:15,984 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:16,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:16,202 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 [2022-03-18 01:14:16,203 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 1 times [2022-03-18 01:14:16,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:16,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838148287] [2022-03-18 01:14:16,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 2 times [2022-03-18 01:14:16,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:16,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241223029] [2022-03-18 01:14:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:16,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:16,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488966140] [2022-03-18 01:14:16,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:16,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:16,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:16,221 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) [2022-03-18 01:14:16,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 01:14:16,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:16,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 01:14:16,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 19 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-18 01:14:16,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:17,412 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:17,414 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:14:43,228 WARN L232 SmtUtils]: Spent 13.84s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 01:14:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241223029] [2022-03-18 01:14:43,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488966140] [2022-03-18 01:14:43,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488966140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:14:43,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:14:43,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 01:14:43,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:43,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838148287] [2022-03-18 01:14:43,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838148287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:43,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:43,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 01:14:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48022526] [2022-03-18 01:14:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:43,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 01:14:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 01:14:43,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-18 01:14:43,232 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:14:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:45,920 INFO L93 Difference]: Finished difference Result 388 states and 532 transitions. [2022-03-18 01:14:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 01:14:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2022-03-18 01:14:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:45,923 INFO L225 Difference]: With dead ends: 388 [2022-03-18 01:14:45,923 INFO L226 Difference]: Without dead ends: 385 [2022-03-18 01:14:45,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=100, Invalid=549, Unknown=1, NotChecked=0, Total=650 [2022-03-18 01:14:45,924 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:45,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 334 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:14:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-18 01:14:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-03-18 01:14:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 190 states have internal predecessors, (225), 105 states have call successors, (105), 24 states have call predecessors, (105), 23 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-18 01:14:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2022-03-18 01:14:45,998 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 75 [2022-03-18 01:14:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:45,998 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2022-03-18 01:14:45,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:14:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2022-03-18 01:14:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 01:14:45,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:45,999 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:46,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:46,215 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 [2022-03-18 01:14:46,215 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 3 times [2022-03-18 01:14:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [707535070] [2022-03-18 01:14:46,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 4 times [2022-03-18 01:14:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092153067] [2022-03-18 01:14:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:46,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:46,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768473328] [2022-03-18 01:14:46,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:46,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:46,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:46,231 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) [2022-03-18 01:14:46,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 01:14:46,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:46,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 01:14:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-18 01:14:47,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:49,531 WARN L855 $PredicateComparison]: unable to prove that (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (not (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) 0)) (= (let ((.cse0 (+ c_main_~d~0 c_main_~k~0))) (+ c_main_~b~0 (* (+ (* (- 1) (* c_main_~s~0 .cse0)) c_main_~r~0) c_main_~y~0) (* (+ (* (- 1) c_main_~q~0 .cse0) c_main_~p~0) c_main_~x~0))) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) is different from true [2022-03-18 01:14:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 49 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 2 not checked. [2022-03-18 01:14:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092153067] [2022-03-18 01:14:55,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768473328] [2022-03-18 01:14:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768473328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:55,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-03-18 01:14:55,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [707535070] [2022-03-18 01:14:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [707535070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:55,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:55,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:14:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475969196] [2022-03-18 01:14:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:55,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:14:55,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:14:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=550, Unknown=1, NotChecked=48, Total=702 [2022-03-18 01:14:55,075 INFO L87 Difference]: Start difference. First operand 318 states and 433 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 01:14:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:58,295 INFO L93 Difference]: Finished difference Result 406 states and 555 transitions. [2022-03-18 01:14:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:14:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 80 [2022-03-18 01:14:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:58,298 INFO L225 Difference]: With dead ends: 406 [2022-03-18 01:14:58,298 INFO L226 Difference]: Without dead ends: 403 [2022-03-18 01:14:58,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=140, Invalid=793, Unknown=1, NotChecked=58, Total=992 [2022-03-18 01:14:58,299 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:58,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 549 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:14:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-18 01:14:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-03-18 01:14:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 227 states have internal predecessors, (271), 133 states have call successors, (133), 28 states have call predecessors, (133), 27 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 01:14:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 535 transitions. [2022-03-18 01:14:58,379 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 535 transitions. Word has length 80 [2022-03-18 01:14:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:58,379 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 535 transitions. [2022-03-18 01:14:58,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 01:14:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 535 transitions. [2022-03-18 01:14:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 01:14:58,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:58,381 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:58,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 01:14:58,590 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 [2022-03-18 01:14:58,590 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 1 times [2022-03-18 01:14:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008344710] [2022-03-18 01:14:58,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 2 times [2022-03-18 01:14:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569945773] [2022-03-18 01:14:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:58,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:58,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:58,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129090019] [2022-03-18 01:14:58,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:58,599 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) [2022-03-18 01:14:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 01:14:58,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 01:14:58,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:14:58,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:14:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:59,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569945773] [2022-03-18 01:14:59,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129090019] [2022-03-18 01:14:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129090019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:59,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:59,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 01:14:59,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008344710] [2022-03-18 01:14:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008344710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:59,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:59,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:14:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891818943] [2022-03-18 01:14:59,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:59,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:14:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:14:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:14:59,731 INFO L87 Difference]: Start difference. First operand 387 states and 535 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 01:15:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:00,067 INFO L93 Difference]: Finished difference Result 540 states and 774 transitions. [2022-03-18 01:15:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:15:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-03-18 01:15:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:00,073 INFO L225 Difference]: With dead ends: 540 [2022-03-18 01:15:00,073 INFO L226 Difference]: Without dead ends: 538 [2022-03-18 01:15:00,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:15:00,074 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:00,074 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 386 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:15:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-18 01:15:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 520. [2022-03-18 01:15:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 287 states have (on average 1.2334494773519165) internal successors, (354), 288 states have internal predecessors, (354), 201 states have call successors, (201), 32 states have call predecessors, (201), 31 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-18 01:15:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 754 transitions. [2022-03-18 01:15:00,198 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 754 transitions. Word has length 83 [2022-03-18 01:15:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:00,198 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 754 transitions. [2022-03-18 01:15:00,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-18 01:15:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 754 transitions. [2022-03-18 01:15:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 01:15:00,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:00,200 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:00,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:00,419 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 [2022-03-18 01:15:00,419 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 7 times [2022-03-18 01:15:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:00,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11232958] [2022-03-18 01:15:00,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 8 times [2022-03-18 01:15:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:00,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506853069] [2022-03-18 01:15:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:00,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:00,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:00,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295771859] [2022-03-18 01:15:00,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:15:00,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:00,431 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) [2022-03-18 01:15:00,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 01:15:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:15:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 01:15:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:00,951 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:02,322 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:02,324 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:02,972 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-18 01:15:03,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-18 01:15:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506853069] [2022-03-18 01:15:05,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295771859] [2022-03-18 01:15:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295771859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:05,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:05,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-03-18 01:15:05,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11232958] [2022-03-18 01:15:05,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11232958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:05,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:05,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 01:15:05,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780453761] [2022-03-18 01:15:05,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:05,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 01:15:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 01:15:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:15:05,356 INFO L87 Difference]: Start difference. First operand 520 states and 754 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-18 01:15:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:07,737 INFO L93 Difference]: Finished difference Result 606 states and 880 transitions. [2022-03-18 01:15:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 01:15:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 91 [2022-03-18 01:15:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:07,741 INFO L225 Difference]: With dead ends: 606 [2022-03-18 01:15:07,741 INFO L226 Difference]: Without dead ends: 604 [2022-03-18 01:15:07,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 01:15:07,742 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:07,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 592 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 578 Invalid, 0 Unknown, 212 Unchecked, 0.9s Time] [2022-03-18 01:15:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-18 01:15:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2022-03-18 01:15:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 328 states have (on average 1.2347560975609757) internal successors, (405), 329 states have internal predecessors, (405), 233 states have call successors, (233), 34 states have call predecessors, (233), 33 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-18 01:15:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 869 transitions. [2022-03-18 01:15:07,894 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 869 transitions. Word has length 91 [2022-03-18 01:15:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:07,895 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 869 transitions. [2022-03-18 01:15:07,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-18 01:15:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 869 transitions. [2022-03-18 01:15:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 01:15:07,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:07,896 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:07,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-18 01:15:08,107 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 [2022-03-18 01:15:08,107 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 5 times [2022-03-18 01:15:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358201387] [2022-03-18 01:15:08,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 6 times [2022-03-18 01:15:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148663327] [2022-03-18 01:15:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:08,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:08,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731747437] [2022-03-18 01:15:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:15:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:08,117 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) [2022-03-18 01:15:08,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 01:15:08,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:15:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 01:15:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 01:15:08,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:08,935 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:09,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:09,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148663327] [2022-03-18 01:15:09,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731747437] [2022-03-18 01:15:09,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731747437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:15:09,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:15:09,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 01:15:09,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358201387] [2022-03-18 01:15:09,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358201387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:09,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:09,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:15:09,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624524424] [2022-03-18 01:15:09,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:09,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:15:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:15:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:15:09,328 INFO L87 Difference]: Start difference. First operand 595 states and 869 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:15:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:09,818 INFO L93 Difference]: Finished difference Result 686 states and 997 transitions. [2022-03-18 01:15:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:15:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2022-03-18 01:15:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:09,823 INFO L225 Difference]: With dead ends: 686 [2022-03-18 01:15:09,823 INFO L226 Difference]: Without dead ends: 683 [2022-03-18 01:15:09,823 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-18 01:15:09,824 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:09,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 299 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:15:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-18 01:15:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 675. [2022-03-18 01:15:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 372 states have (on average 1.2338709677419355) internal successors, (459), 374 states have internal predecessors, (459), 264 states have call successors, (264), 39 states have call predecessors, (264), 38 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-03-18 01:15:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 985 transitions. [2022-03-18 01:15:09,971 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 985 transitions. Word has length 97 [2022-03-18 01:15:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:09,972 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 985 transitions. [2022-03-18 01:15:09,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:15:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 985 transitions. [2022-03-18 01:15:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 01:15:09,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:09,973 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:09,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:10,196 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 [2022-03-18 01:15:10,196 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 9 times [2022-03-18 01:15:10,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444121292] [2022-03-18 01:15:10,197 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 10 times [2022-03-18 01:15:10,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423739721] [2022-03-18 01:15:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:10,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:10,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:10,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171689236] [2022-03-18 01:15:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:15:10,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:10,207 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) [2022-03-18 01:15:10,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 01:15:10,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:15:10,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 01:15:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-18 01:15:12,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-18 01:15:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:13,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423739721] [2022-03-18 01:15:13,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:13,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171689236] [2022-03-18 01:15:13,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171689236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:13,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:13,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 33 [2022-03-18 01:15:13,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:13,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444121292] [2022-03-18 01:15:13,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444121292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:13,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:13,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 01:15:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427232249] [2022-03-18 01:15:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:13,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 01:15:13,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 01:15:13,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 01:15:13,841 INFO L87 Difference]: Start difference. First operand 675 states and 985 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-18 01:15:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:15,501 INFO L93 Difference]: Finished difference Result 767 states and 1110 transitions. [2022-03-18 01:15:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 01:15:15,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2022-03-18 01:15:15,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:15,506 INFO L225 Difference]: With dead ends: 767 [2022-03-18 01:15:15,506 INFO L226 Difference]: Without dead ends: 765 [2022-03-18 01:15:15,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 01:15:15,508 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:15,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 732 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:15:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-18 01:15:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2022-03-18 01:15:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 412 states have (on average 1.233009708737864) internal successors, (508), 414 states have internal predecessors, (508), 292 states have call successors, (292), 43 states have call predecessors, (292), 42 states have return successors, (290), 289 states have call predecessors, (290), 290 states have call successors, (290) [2022-03-18 01:15:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1090 transitions. [2022-03-18 01:15:15,709 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1090 transitions. Word has length 96 [2022-03-18 01:15:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:15,710 INFO L478 AbstractCegarLoop]: Abstraction has 747 states and 1090 transitions. [2022-03-18 01:15:15,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-18 01:15:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1090 transitions. [2022-03-18 01:15:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 01:15:15,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:15,712 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:15,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:15,927 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 [2022-03-18 01:15:15,927 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 7 times [2022-03-18 01:15:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536818460] [2022-03-18 01:15:15,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 8 times [2022-03-18 01:15:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724748284] [2022-03-18 01:15:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:15,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:15,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707222965] [2022-03-18 01:15:15,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:15:15,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:15,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:15,937 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) [2022-03-18 01:15:15,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 01:15:15,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:15:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 01:15:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:16,958 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 01:15:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:18,578 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:19,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724748284] [2022-03-18 01:15:19,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707222965] [2022-03-18 01:15:19,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707222965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:15:19,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:15:19,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 01:15:19,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536818460] [2022-03-18 01:15:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536818460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:19,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:19,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:15:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717580792] [2022-03-18 01:15:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:19,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:15:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:15:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-18 01:15:19,599 INFO L87 Difference]: Start difference. First operand 747 states and 1090 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 01:15:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:21,616 INFO L93 Difference]: Finished difference Result 831 states and 1208 transitions. [2022-03-18 01:15:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:15:21,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-03-18 01:15:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:21,621 INFO L225 Difference]: With dead ends: 831 [2022-03-18 01:15:21,621 INFO L226 Difference]: Without dead ends: 828 [2022-03-18 01:15:21,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 01:15:21,623 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:21,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 566 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:15:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-18 01:15:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 819. [2022-03-18 01:15:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 452 states have (on average 1.2323008849557522) internal successors, (557), 454 states have internal predecessors, (557), 320 states have call successors, (320), 47 states have call predecessors, (320), 46 states have return successors, (318), 317 states have call predecessors, (318), 318 states have call successors, (318) [2022-03-18 01:15:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1195 transitions. [2022-03-18 01:15:21,825 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1195 transitions. Word has length 100 [2022-03-18 01:15:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:21,825 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1195 transitions. [2022-03-18 01:15:21,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 01:15:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1195 transitions. [2022-03-18 01:15:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 01:15:21,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:21,827 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:21,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 01:15:22,032 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 [2022-03-18 01:15:22,032 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 9 times [2022-03-18 01:15:22,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:22,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996455597] [2022-03-18 01:15:22,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 10 times [2022-03-18 01:15:22,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:22,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355760534] [2022-03-18 01:15:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:22,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:22,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208447080] [2022-03-18 01:15:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:15:22,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:22,040 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) [2022-03-18 01:15:22,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 01:15:22,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:15:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 01:15:22,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 01:15:24,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-18 01:15:30,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:30,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355760534] [2022-03-18 01:15:30,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:30,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208447080] [2022-03-18 01:15:30,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208447080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:30,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:30,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-18 01:15:30,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:30,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996455597] [2022-03-18 01:15:30,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996455597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:30,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:30,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 01:15:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220859291] [2022-03-18 01:15:30,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:30,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 01:15:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 01:15:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 01:15:30,298 INFO L87 Difference]: Start difference. First operand 819 states and 1195 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 01:15:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:34,016 INFO L93 Difference]: Finished difference Result 923 states and 1350 transitions. [2022-03-18 01:15:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 01:15:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 102 [2022-03-18 01:15:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:34,022 INFO L225 Difference]: With dead ends: 923 [2022-03-18 01:15:34,022 INFO L226 Difference]: Without dead ends: 920 [2022-03-18 01:15:34,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 01:15:34,023 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:34,023 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 657 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 01:15:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-18 01:15:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-03-18 01:15:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 495 states have (on average 1.2383838383838384) internal successors, (613), 497 states have internal predecessors, (613), 360 states have call successors, (360), 50 states have call predecessors, (360), 49 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-18 01:15:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1331 transitions. [2022-03-18 01:15:34,309 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1331 transitions. Word has length 102 [2022-03-18 01:15:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:34,310 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1331 transitions. [2022-03-18 01:15:34,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 01:15:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1331 transitions. [2022-03-18 01:15:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 01:15:34,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:34,311 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:34,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:34,515 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 [2022-03-18 01:15:34,515 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 11 times [2022-03-18 01:15:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749884652] [2022-03-18 01:15:34,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 12 times [2022-03-18 01:15:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866327787] [2022-03-18 01:15:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:34,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:34,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905310630] [2022-03-18 01:15:34,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:15:34,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:34,526 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) [2022-03-18 01:15:34,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 01:15:34,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 01:15:34,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 01:15:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 01:15:35,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 01:15:38,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866327787] [2022-03-18 01:15:38,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905310630] [2022-03-18 01:15:38,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905310630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:38,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:38,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-18 01:15:38,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749884652] [2022-03-18 01:15:38,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749884652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:38,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:38,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:15:38,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847052383] [2022-03-18 01:15:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:38,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:15:38,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:15:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:15:38,231 INFO L87 Difference]: Start difference. First operand 905 states and 1331 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:15:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:39,607 INFO L93 Difference]: Finished difference Result 990 states and 1451 transitions. [2022-03-18 01:15:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:15:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 105 [2022-03-18 01:15:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:39,612 INFO L225 Difference]: With dead ends: 990 [2022-03-18 01:15:39,612 INFO L226 Difference]: Without dead ends: 987 [2022-03-18 01:15:39,612 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 01:15:39,613 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:39,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 657 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:15:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-18 01:15:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 912. [2022-03-18 01:15:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 501 states have (on average 1.2355289421157685) internal successors, (619), 503 states have internal predecessors, (619), 360 states have call successors, (360), 51 states have call predecessors, (360), 50 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-18 01:15:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1337 transitions. [2022-03-18 01:15:39,856 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1337 transitions. Word has length 105 [2022-03-18 01:15:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:39,856 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1337 transitions. [2022-03-18 01:15:39,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:15:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1337 transitions. [2022-03-18 01:15:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 01:15:39,858 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:39,858 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:39,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:40,076 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 [2022-03-18 01:15:40,076 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 13 times [2022-03-18 01:15:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771012097] [2022-03-18 01:15:40,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 14 times [2022-03-18 01:15:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:40,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739676138] [2022-03-18 01:15:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:40,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:40,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208890752] [2022-03-18 01:15:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:15:40,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:40,093 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) [2022-03-18 01:15:40,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 01:15:40,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:15:40,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 01:15:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 76 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-18 01:15:41,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-18 01:15:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:43,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739676138] [2022-03-18 01:15:43,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:43,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208890752] [2022-03-18 01:15:43,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208890752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:43,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:43,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-03-18 01:15:43,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771012097] [2022-03-18 01:15:43,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771012097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:43,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:43,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 01:15:43,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544287407] [2022-03-18 01:15:43,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:43,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 01:15:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 01:15:43,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-18 01:15:43,689 INFO L87 Difference]: Start difference. First operand 912 states and 1337 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 01:15:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:47,232 INFO L93 Difference]: Finished difference Result 1057 states and 1544 transitions. [2022-03-18 01:15:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 01:15:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 105 [2022-03-18 01:15:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:47,239 INFO L225 Difference]: With dead ends: 1057 [2022-03-18 01:15:47,239 INFO L226 Difference]: Without dead ends: 1054 [2022-03-18 01:15:47,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 01:15:47,240 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:47,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 685 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:15:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-18 01:15:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 978. [2022-03-18 01:15:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 537 states have (on average 1.23463687150838) internal successors, (663), 539 states have internal predecessors, (663), 384 states have call successors, (384), 57 states have call predecessors, (384), 56 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-18 01:15:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1429 transitions. [2022-03-18 01:15:47,596 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1429 transitions. Word has length 105 [2022-03-18 01:15:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:47,596 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1429 transitions. [2022-03-18 01:15:47,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 01:15:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1429 transitions. [2022-03-18 01:15:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 01:15:47,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:47,599 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:47,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:47,811 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 [2022-03-18 01:15:47,812 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 15 times [2022-03-18 01:15:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90939379] [2022-03-18 01:15:47,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 16 times [2022-03-18 01:15:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:47,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656272632] [2022-03-18 01:15:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:47,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801929203] [2022-03-18 01:15:47,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:15:47,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:47,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:47,822 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) [2022-03-18 01:15:47,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 01:15:47,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:15:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-18 01:15:47,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 94 proven. 89 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-18 01:15:50,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-18 01:15:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656272632] [2022-03-18 01:15:52,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801929203] [2022-03-18 01:15:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801929203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:52,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:52,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-03-18 01:15:52,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90939379] [2022-03-18 01:15:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90939379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:52,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:52,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 01:15:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863280091] [2022-03-18 01:15:52,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:52,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 01:15:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 01:15:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 01:15:52,590 INFO L87 Difference]: Start difference. First operand 978 states and 1429 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 01:15:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:55,059 INFO L93 Difference]: Finished difference Result 1079 states and 1562 transitions. [2022-03-18 01:15:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 01:15:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 110 [2022-03-18 01:15:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:55,064 INFO L225 Difference]: With dead ends: 1079 [2022-03-18 01:15:55,065 INFO L226 Difference]: Without dead ends: 1076 [2022-03-18 01:15:55,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 01:15:55,066 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:55,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 832 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:15:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-18 01:15:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 930. [2022-03-18 01:15:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 515 states have (on average 1.2271844660194176) internal successors, (632), 517 states have internal predecessors, (632), 356 states have call successors, (356), 59 states have call predecessors, (356), 58 states have return successors, (354), 353 states have call predecessors, (354), 354 states have call successors, (354) [2022-03-18 01:15:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1342 transitions. [2022-03-18 01:15:55,386 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1342 transitions. Word has length 110 [2022-03-18 01:15:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:55,388 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1342 transitions. [2022-03-18 01:15:55,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 01:15:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1342 transitions. [2022-03-18 01:15:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 01:15:55,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:55,390 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:55,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:55,613 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 [2022-03-18 01:15:55,613 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 1 times [2022-03-18 01:15:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135945389] [2022-03-18 01:15:55,614 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 2 times [2022-03-18 01:15:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:55,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909463185] [2022-03-18 01:15:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:55,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:55,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185175664] [2022-03-18 01:15:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:15:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:55,626 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) [2022-03-18 01:15:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 01:15:55,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:15:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 01:15:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 71 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 01:15:56,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:15:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-18 01:15:57,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:15:57,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909463185] [2022-03-18 01:15:57,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:15:57,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185175664] [2022-03-18 01:15:57,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185175664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:15:57,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:15:57,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-18 01:15:57,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:15:57,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135945389] [2022-03-18 01:15:57,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135945389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:15:57,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:15:57,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 01:15:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574938517] [2022-03-18 01:15:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:15:57,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 01:15:57,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:57,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 01:15:57,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-03-18 01:15:57,171 INFO L87 Difference]: Start difference. First operand 930 states and 1342 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:15:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:15:58,107 INFO L93 Difference]: Finished difference Result 1026 states and 1469 transitions. [2022-03-18 01:15:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:15:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 113 [2022-03-18 01:15:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:15:58,112 INFO L225 Difference]: With dead ends: 1026 [2022-03-18 01:15:58,112 INFO L226 Difference]: Without dead ends: 1024 [2022-03-18 01:15:58,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-18 01:15:58,113 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 79 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:15:58,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 651 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:15:58,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-18 01:15:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1010. [2022-03-18 01:15:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 561 states have (on average 1.2245989304812834) internal successors, (687), 563 states have internal predecessors, (687), 384 states have call successors, (384), 65 states have call predecessors, (384), 64 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-18 01:15:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1453 transitions. [2022-03-18 01:15:58,436 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1453 transitions. Word has length 113 [2022-03-18 01:15:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:15:58,436 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1453 transitions. [2022-03-18 01:15:58,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:15:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1453 transitions. [2022-03-18 01:15:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 01:15:58,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:15:58,439 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:15:58,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 01:15:58,659 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 [2022-03-18 01:15:58,659 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:15:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:15:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 3 times [2022-03-18 01:15:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:15:58,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551050445] [2022-03-18 01:15:58,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:15:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 4 times [2022-03-18 01:15:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:15:58,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569285741] [2022-03-18 01:15:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:15:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:15:58,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:15:58,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203032243] [2022-03-18 01:15:58,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:15:58,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:15:58,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:15:58,667 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) [2022-03-18 01:15:58,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 01:15:58,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:15:58,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:15:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 01:15:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:15:59,922 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:15:59,946 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:00,187 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:01,091 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:02,239 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:07,495 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:08,452 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:09,737 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:10,816 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:11,906 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:19,639 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:20,686 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:21,775 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:28,004 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:28,007 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:32,482 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* (- 1) c_main_~q~0 c_main_~x~0) c_main_~x~0))) (let ((.cse0 (* (div .cse1 c_main_~x~0) c_main_~x~0))) (and (not (<= (+ (* 2 c_main_~y~0) (* .cse0 2)) c_main_~x~0)) (= (mod .cse1 c_main_~x~0) 0) (not (= c_main_~x~0 0)) (= (+ c_main_~s~0 1) 0) (exists ((aux_div_main_~k~0_31 Int)) (let ((.cse5 (* aux_div_main_~k~0_31 c_main_~x~0))) (let ((.cse4 (div (+ (* (- 1) c_main_~q~0 c_main_~x~0) c_main_~x~0) c_main_~x~0)) (.cse2 (div (+ (* (- 1) c_main_~x~0) .cse5) c_main_~x~0))) (and (let ((.cse3 (+ c_main_~q~0 .cse4))) (= (* 2 (* .cse2 .cse3)) (+ (* (* .cse3 aux_div_main_~k~0_31) 2) .cse4))) (< (+ (* .cse4 c_main_~x~0) (* 2 (* .cse2 c_main_~x~0)) (* 2 (* c_main_~q~0 aux_div_main_~k~0_31 c_main_~x~0)) c_main_~y~0 (* (* .cse4 aux_div_main_~k~0_31 c_main_~x~0) 2)) (+ (* 2 .cse5) (* 2 (* .cse2 c_main_~q~0 c_main_~x~0)) (* 2 (* .cse2 .cse4 c_main_~x~0)) c_main_~x~0)) (<= 1 aux_div_main_~k~0_31) (< (* .cse2 2) 2))))) (= (+ (* (- 1) c_main_~y~0) c_main_~x~0 (* (- 1) .cse0)) c_main_~b~0)))) is different from true [2022-03-18 01:16:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 90 proven. 126 refuted. 0 times theorem prover too weak. 196 trivial. 3 not checked. [2022-03-18 01:16:40,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:44,964 WARN L232 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 01:17:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 116 proven. 87 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-18 01:17:55,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569285741] [2022-03-18 01:17:55,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203032243] [2022-03-18 01:17:55,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203032243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:17:55,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:17:55,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 40 [2022-03-18 01:17:55,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551050445] [2022-03-18 01:17:55,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551050445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:55,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:55,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 01:17:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988515589] [2022-03-18 01:17:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:55,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 01:17:55,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 01:17:55,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1195, Unknown=12, NotChecked=74, Total=1560 [2022-03-18 01:17:55,375 INFO L87 Difference]: Start difference. First operand 1010 states and 1453 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 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) [2022-03-18 01:18:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:18:03,812 INFO L93 Difference]: Finished difference Result 1048 states and 1497 transitions. [2022-03-18 01:18:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 01:18:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 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 118 [2022-03-18 01:18:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:18:03,817 INFO L225 Difference]: With dead ends: 1048 [2022-03-18 01:18:03,818 INFO L226 Difference]: Without dead ends: 1046 [2022-03-18 01:18:03,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 74.7s TimeCoverageRelationStatistics Valid=357, Invalid=1614, Unknown=13, NotChecked=86, Total=2070 [2022-03-18 01:18:03,819 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:18:03,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1042 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 735 Invalid, 0 Unknown, 488 Unchecked, 1.6s Time] [2022-03-18 01:18:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-18 01:18:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1036. [2022-03-18 01:18:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 580 states have (on average 1.2189655172413794) internal successors, (707), 583 states have internal predecessors, (707), 390 states have call successors, (390), 66 states have call predecessors, (390), 65 states have return successors, (388), 386 states have call predecessors, (388), 388 states have call successors, (388) [2022-03-18 01:18:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-03-18 01:18:04,213 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 118 [2022-03-18 01:18:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:18:04,213 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-03-18 01:18:04,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 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) [2022-03-18 01:18:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-03-18 01:18:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 01:18:04,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:18:04,216 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:18:04,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 01:18:04,440 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 [2022-03-18 01:18:04,441 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:18:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:18:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 17 times [2022-03-18 01:18:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854932209] [2022-03-18 01:18:04,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:18:04,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 18 times [2022-03-18 01:18:04,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:18:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101128890] [2022-03-18 01:18:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:18:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:18:04,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:18:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231632584] [2022-03-18 01:18:04,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:18:04,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:18:04,452 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) [2022-03-18 01:18:04,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 01:18:04,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 01:18:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:18:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 01:18:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:18:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-18 01:18:04,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:18:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 01:18:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:18:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101128890] [2022-03-18 01:18:05,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:18:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231632584] [2022-03-18 01:18:05,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231632584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:18:05,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:18:05,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-18 01:18:05,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:18:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854932209] [2022-03-18 01:18:05,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854932209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:18:05,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:18:05,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 01:18:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994339135] [2022-03-18 01:18:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:18:05,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 01:18:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 01:18:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:18:05,289 INFO L87 Difference]: Start difference. First operand 1036 states and 1485 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 01:18:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:18:06,144 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-18 01:18:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:18:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 122 [2022-03-18 01:18:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:18:06,152 INFO L225 Difference]: With dead ends: 1668 [2022-03-18 01:18:06,152 INFO L226 Difference]: Without dead ends: 1176 [2022-03-18 01:18:06,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:18:06,161 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:18:06,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 223 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:18:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-18 01:18:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2022-03-18 01:18:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 616 states have (on average 1.2077922077922079) internal successors, (744), 641 states have internal predecessors, (744), 400 states have call successors, (400), 63 states have call predecessors, (400), 62 states have return successors, (398), 374 states have call predecessors, (398), 398 states have call successors, (398) [2022-03-18 01:18:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1542 transitions. [2022-03-18 01:18:06,611 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1542 transitions. Word has length 122 [2022-03-18 01:18:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:18:06,611 INFO L478 AbstractCegarLoop]: Abstraction has 1079 states and 1542 transitions. [2022-03-18 01:18:06,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 01:18:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1542 transitions. [2022-03-18 01:18:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 01:18:06,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:18:06,614 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:18:06,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 01:18:06,839 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 [2022-03-18 01:18:06,840 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:18:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:18:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 19 times [2022-03-18 01:18:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:06,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351397624] [2022-03-18 01:18:06,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:18:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 20 times [2022-03-18 01:18:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:18:06,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082181900] [2022-03-18 01:18:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:18:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:18:06,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:18:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802464401] [2022-03-18 01:18:06,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:18:06,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:18:06,866 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) [2022-03-18 01:18:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 01:18:06,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:18:06,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:18:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 01:18:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:18:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 01:18:10,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:18:13,133 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:18:13,135 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:18:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 01:18:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:18:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082181900] [2022-03-18 01:18:17,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:18:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802464401] [2022-03-18 01:18:17,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802464401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:18:17,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:18:17,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-18 01:18:17,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:18:17,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351397624] [2022-03-18 01:18:17,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351397624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:18:17,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:18:17,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 01:18:17,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954714162] [2022-03-18 01:18:17,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:18:17,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 01:18:17,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 01:18:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-03-18 01:18:17,980 INFO L87 Difference]: Start difference. First operand 1079 states and 1542 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:18:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:18:21,161 INFO L93 Difference]: Finished difference Result 1207 states and 1726 transitions. [2022-03-18 01:18:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:18:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 122 [2022-03-18 01:18:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:18:21,169 INFO L225 Difference]: With dead ends: 1207 [2022-03-18 01:18:21,169 INFO L226 Difference]: Without dead ends: 1204 [2022-03-18 01:18:21,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 01:18:21,169 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 58 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:18:21,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 483 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 01:18:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-18 01:18:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1118. [2022-03-18 01:18:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 636 states have (on average 1.2091194968553458) internal successors, (769), 661 states have internal predecessors, (769), 416 states have call successors, (416), 66 states have call predecessors, (416), 65 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-18 01:18:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1599 transitions. [2022-03-18 01:18:21,555 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1599 transitions. Word has length 122 [2022-03-18 01:18:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:18:21,556 INFO L478 AbstractCegarLoop]: Abstraction has 1118 states and 1599 transitions. [2022-03-18 01:18:21,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:18:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1599 transitions. [2022-03-18 01:18:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 01:18:21,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:18:21,558 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:18:21,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 01:18:21,771 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 [2022-03-18 01:18:21,771 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:18:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:18:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 21 times [2022-03-18 01:18:21,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95050] [2022-03-18 01:18:21,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:18:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 22 times [2022-03-18 01:18:21,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:18:21,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988711990] [2022-03-18 01:18:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:18:21,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:18:21,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:18:21,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971036177] [2022-03-18 01:18:21,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:18:21,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:21,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:18:21,782 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) [2022-03-18 01:18:21,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 01:18:21,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:18:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:18:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 01:18:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:18:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 139 proven. 89 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-18 01:18:25,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:18:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 149 proven. 47 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-18 01:18:37,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:18:37,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988711990] [2022-03-18 01:18:37,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:18:37,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971036177] [2022-03-18 01:18:37,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971036177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:18:37,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:18:37,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-18 01:18:37,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:18:37,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95050] [2022-03-18 01:18:37,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:18:37,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:18:37,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 01:18:37,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587343043] [2022-03-18 01:18:37,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:18:37,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 01:18:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 01:18:37,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 01:18:37,060 INFO L87 Difference]: Start difference. First operand 1118 states and 1599 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:18:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:18:42,043 INFO L93 Difference]: Finished difference Result 1243 states and 1785 transitions. [2022-03-18 01:18:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 01:18:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 124 [2022-03-18 01:18:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:18:42,049 INFO L225 Difference]: With dead ends: 1243 [2022-03-18 01:18:42,049 INFO L226 Difference]: Without dead ends: 1240 [2022-03-18 01:18:42,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 01:18:42,050 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 96 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:18:42,050 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 568 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 01:18:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-18 01:18:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1128. [2022-03-18 01:18:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 641 states have (on average 1.2090483619344774) internal successors, (775), 666 states have internal predecessors, (775), 420 states have call successors, (420), 67 states have call predecessors, (420), 66 states have return successors, (418), 394 states have call predecessors, (418), 418 states have call successors, (418) [2022-03-18 01:18:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1613 transitions. [2022-03-18 01:18:42,394 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1613 transitions. Word has length 124 [2022-03-18 01:18:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:18:42,394 INFO L478 AbstractCegarLoop]: Abstraction has 1128 states and 1613 transitions. [2022-03-18 01:18:42,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:18:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1613 transitions. [2022-03-18 01:18:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 01:18:42,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:18:42,396 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:18:42,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 01:18:42,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 01:18:42,624 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:18:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:18:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 11 times [2022-03-18 01:18:42,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:42,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448081262] [2022-03-18 01:18:42,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:18:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 12 times [2022-03-18 01:18:42,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:18:42,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600396494] [2022-03-18 01:18:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:18:42,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:18:42,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:18:42,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080630912] [2022-03-18 01:18:42,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:18:42,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:18:42,632 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:18:42,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 01:18:42,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:18:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:18:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 01:18:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:18:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-18 01:18:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:18:46,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:18:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600396494] [2022-03-18 01:18:46,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:18:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080630912] [2022-03-18 01:18:46,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080630912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:18:46,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:18:46,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 01:18:46,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:18:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448081262] [2022-03-18 01:18:46,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448081262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:18:46,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:18:46,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:18:46,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230494605] [2022-03-18 01:18:46,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:18:46,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:18:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:18:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:18:46,188 INFO L87 Difference]: Start difference. First operand 1128 states and 1613 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:18:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:18:47,573 INFO L93 Difference]: Finished difference Result 1166 states and 1653 transitions. [2022-03-18 01:18:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 01:18:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-03-18 01:18:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:18:47,578 INFO L225 Difference]: With dead ends: 1166 [2022-03-18 01:18:47,578 INFO L226 Difference]: Without dead ends: 1164 [2022-03-18 01:18:47,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-18 01:18:47,579 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:18:47,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 202 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:18:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-03-18 01:18:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1111. [2022-03-18 01:18:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 628 states have (on average 1.2117834394904459) internal successors, (761), 653 states have internal predecessors, (761), 416 states have call successors, (416), 67 states have call predecessors, (416), 66 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-18 01:18:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1591 transitions. [2022-03-18 01:18:48,050 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1591 transitions. Word has length 121 [2022-03-18 01:18:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:18:48,050 INFO L478 AbstractCegarLoop]: Abstraction has 1111 states and 1591 transitions. [2022-03-18 01:18:48,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 01:18:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1591 transitions. [2022-03-18 01:18:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 01:18:48,053 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:18:48,053 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:18:48,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 01:18:48,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:48,278 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:18:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:18:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 23 times [2022-03-18 01:18:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:48,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760577549] [2022-03-18 01:18:48,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:18:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 24 times [2022-03-18 01:18:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:18:48,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437549643] [2022-03-18 01:18:48,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:18:48,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:18:48,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:18:48,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476744457] [2022-03-18 01:18:48,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:18:48,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:18:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:18:48,288 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:18:48,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 01:18:48,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 01:18:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:18:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 01:18:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:18:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 01:18:51,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:18:55,638 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:18:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:18:56,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437549643] [2022-03-18 01:18:56,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:18:56,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476744457] [2022-03-18 01:18:56,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476744457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:18:56,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:18:56,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-18 01:18:56,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:18:56,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760577549] [2022-03-18 01:18:56,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760577549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:18:56,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:18:56,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 01:18:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780708794] [2022-03-18 01:18:56,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:18:56,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 01:18:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:18:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 01:18:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-18 01:18:56,341 INFO L87 Difference]: Start difference. First operand 1111 states and 1591 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 01:19:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:19:01,028 INFO L93 Difference]: Finished difference Result 1237 states and 1772 transitions. [2022-03-18 01:19:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 01:19:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 127 [2022-03-18 01:19:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:19:01,034 INFO L225 Difference]: With dead ends: 1237 [2022-03-18 01:19:01,034 INFO L226 Difference]: Without dead ends: 1234 [2022-03-18 01:19:01,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 01:19:01,035 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 74 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:19:01,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 721 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 01:19:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-18 01:19:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1140. [2022-03-18 01:19:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 643 states have (on average 1.213063763608087) internal successors, (780), 668 states have internal predecessors, (780), 428 states have call successors, (428), 69 states have call predecessors, (428), 68 states have return successors, (426), 402 states have call predecessors, (426), 426 states have call successors, (426) [2022-03-18 01:19:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1634 transitions. [2022-03-18 01:19:01,387 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1634 transitions. Word has length 127 [2022-03-18 01:19:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:19:01,387 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1634 transitions. [2022-03-18 01:19:01,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 01:19:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1634 transitions. [2022-03-18 01:19:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 01:19:01,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:19:01,390 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:19:01,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 01:19:01,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:19:01,603 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:19:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:19:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 25 times [2022-03-18 01:19:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:19:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775348615] [2022-03-18 01:19:01,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:19:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 26 times [2022-03-18 01:19:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:19:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611812199] [2022-03-18 01:19:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:19:01,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:19:01,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:19:01,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321106667] [2022-03-18 01:19:01,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:19:01,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:19:01,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:19:01,613 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:19:01,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 01:19:01,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:19:01,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:19:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 01:19:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:19:02,394 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:19:02,395 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:19:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 01:19:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:19:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-03-18 01:19:15,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:19:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611812199] [2022-03-18 01:19:15,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:19:15,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321106667] [2022-03-18 01:19:15,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321106667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:19:15,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:19:15,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-18 01:19:15,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:19:15,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775348615] [2022-03-18 01:19:15,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775348615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:19:15,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:19:15,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 01:19:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591583346] [2022-03-18 01:19:15,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:19:15,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 01:19:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:19:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 01:19:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-18 01:19:15,848 INFO L87 Difference]: Start difference. First operand 1140 states and 1634 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:19:19,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:19:21,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:19:23,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:19:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:19:28,430 INFO L93 Difference]: Finished difference Result 1268 states and 1824 transitions. [2022-03-18 01:19:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 01:19:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-18 01:19:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:19:28,436 INFO L225 Difference]: With dead ends: 1268 [2022-03-18 01:19:28,436 INFO L226 Difference]: Without dead ends: 1265 [2022-03-18 01:19:28,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 01:19:28,437 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 95 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:19:28,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 721 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1192 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-03-18 01:19:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-03-18 01:19:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-03-18 01:19:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 694 states have (on average 1.217579250720461) internal successors, (845), 721 states have internal predecessors, (845), 472 states have call successors, (472), 73 states have call predecessors, (472), 72 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-18 01:19:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1787 transitions. [2022-03-18 01:19:28,839 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1787 transitions. Word has length 127 [2022-03-18 01:19:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:19:28,839 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1787 transitions. [2022-03-18 01:19:28,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:19:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1787 transitions. [2022-03-18 01:19:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 01:19:28,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:19:28,841 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:19:28,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 01:19:29,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 01:19:29,055 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:19:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:19:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 27 times [2022-03-18 01:19:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:19:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901635723] [2022-03-18 01:19:29,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:19:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 28 times [2022-03-18 01:19:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:19:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518507349] [2022-03-18 01:19:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:19:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:19:29,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:19:29,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10235185] [2022-03-18 01:19:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:19:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:19:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:19:29,066 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:19:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 01:19:29,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:19:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:19:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 01:19:29,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:19:30,962 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:19:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 137 proven. 134 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-18 01:19:34,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:19:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 178 proven. 17 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-03-18 01:19:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:19:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518507349] [2022-03-18 01:19:44,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:19:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10235185] [2022-03-18 01:19:44,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10235185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:19:44,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:19:44,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2022-03-18 01:19:44,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:19:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901635723] [2022-03-18 01:19:44,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901635723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:19:44,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:19:44,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 01:19:44,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351465044] [2022-03-18 01:19:44,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:19:44,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 01:19:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:19:44,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 01:19:44,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 01:19:44,454 INFO L87 Difference]: Start difference. First operand 1239 states and 1787 transitions. Second operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:19:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:19:51,086 INFO L93 Difference]: Finished difference Result 1339 states and 1928 transitions. [2022-03-18 01:19:51,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 01:19:51,087 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-18 01:19:51,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:19:51,092 INFO L225 Difference]: With dead ends: 1339 [2022-03-18 01:19:51,092 INFO L226 Difference]: Without dead ends: 1336 [2022-03-18 01:19:51,092 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 01:19:51,092 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 105 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:19:51,093 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 772 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-18 01:19:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-18 01:19:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1243. [2022-03-18 01:19:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 697 states have (on average 1.2166427546628407) internal successors, (848), 724 states have internal predecessors, (848), 472 states have call successors, (472), 74 states have call predecessors, (472), 73 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-18 01:19:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1790 transitions. [2022-03-18 01:19:51,477 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1790 transitions. Word has length 127 [2022-03-18 01:19:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:19:51,478 INFO L478 AbstractCegarLoop]: Abstraction has 1243 states and 1790 transitions. [2022-03-18 01:19:51,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:19:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1790 transitions. [2022-03-18 01:19:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-18 01:19:51,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:19:51,480 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:19:51,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 01:19:51,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 01:19:51,695 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:19:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:19:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 29 times [2022-03-18 01:19:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:19:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635103548] [2022-03-18 01:19:51,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:19:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 30 times [2022-03-18 01:19:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:19:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464164167] [2022-03-18 01:19:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:19:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:19:51,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:19:51,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862212505] [2022-03-18 01:19:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:19:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:19:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:19:51,712 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:19:51,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 01:19:51,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 01:19:51,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:19:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 01:19:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:19:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 01:19:56,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:20:04,355 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:20:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 156 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 01:20:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:20:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464164167] [2022-03-18 01:20:49,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:20:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862212505] [2022-03-18 01:20:49,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862212505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:20:49,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:20:49,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2022-03-18 01:20:49,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:20:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635103548] [2022-03-18 01:20:49,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635103548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:20:49,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:20:49,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 01:20:49,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361412866] [2022-03-18 01:20:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:20:49,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 01:20:49,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:20:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 01:20:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1248, Unknown=2, NotChecked=0, Total=1560 [2022-03-18 01:20:49,559 INFO L87 Difference]: Start difference. First operand 1243 states and 1790 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:20:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:20:53,494 INFO L93 Difference]: Finished difference Result 1350 states and 1938 transitions. [2022-03-18 01:20:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 01:20:53,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 130 [2022-03-18 01:20:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:20:53,502 INFO L225 Difference]: With dead ends: 1350 [2022-03-18 01:20:53,502 INFO L226 Difference]: Without dead ends: 1347 [2022-03-18 01:20:53,503 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=457, Invalid=1893, Unknown=2, NotChecked=0, Total=2352 [2022-03-18 01:20:53,503 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 81 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:20:53,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 742 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-18 01:20:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-03-18 01:20:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1248. [2022-03-18 01:20:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 700 states have (on average 1.2157142857142857) internal successors, (851), 727 states have internal predecessors, (851), 473 states have call successors, (473), 75 states have call predecessors, (473), 74 states have return successors, (471), 445 states have call predecessors, (471), 471 states have call successors, (471) [2022-03-18 01:20:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1795 transitions. [2022-03-18 01:20:53,916 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1795 transitions. Word has length 130 [2022-03-18 01:20:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:20:53,917 INFO L478 AbstractCegarLoop]: Abstraction has 1248 states and 1795 transitions. [2022-03-18 01:20:53,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:20:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1795 transitions. [2022-03-18 01:20:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 01:20:53,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:20:53,919 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:20:53,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 01:20:54,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 01:20:54,143 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:20:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:20:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 31 times [2022-03-18 01:20:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:20:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810191032] [2022-03-18 01:20:54,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:20:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 32 times [2022-03-18 01:20:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:20:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758075890] [2022-03-18 01:20:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:20:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:20:54,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:20:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195125175] [2022-03-18 01:20:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:20:54,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:20:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:20:54,157 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:20:54,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 01:20:54,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:20:54,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:20:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 01:20:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:20:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 107 proven. 114 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-18 01:20:59,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:21:01,763 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:21:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:21:03,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758075890] [2022-03-18 01:21:03,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:21:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195125175] [2022-03-18 01:21:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195125175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:21:03,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:21:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 01:21:03,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:21:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810191032] [2022-03-18 01:21:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810191032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:21:03,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:21:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 01:21:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278379852] [2022-03-18 01:21:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:21:03,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 01:21:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:21:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 01:21:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-18 01:21:03,895 INFO L87 Difference]: Start difference. First operand 1248 states and 1795 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:21:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:21:11,757 INFO L93 Difference]: Finished difference Result 1389 states and 2002 transitions. [2022-03-18 01:21:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 01:21:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 132 [2022-03-18 01:21:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:21:11,764 INFO L225 Difference]: With dead ends: 1389 [2022-03-18 01:21:11,764 INFO L226 Difference]: Without dead ends: 1386 [2022-03-18 01:21:11,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 01:21:11,765 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 95 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:21:11,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-18 01:21:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-03-18 01:21:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1343. [2022-03-18 01:21:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 748 states have (on average 1.2205882352941178) internal successors, (913), 777 states have internal predecessors, (913), 517 states have call successors, (517), 78 states have call predecessors, (517), 77 states have return successors, (515), 487 states have call predecessors, (515), 515 states have call successors, (515) [2022-03-18 01:21:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1945 transitions. [2022-03-18 01:21:12,194 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1945 transitions. Word has length 132 [2022-03-18 01:21:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:21:12,194 INFO L478 AbstractCegarLoop]: Abstraction has 1343 states and 1945 transitions. [2022-03-18 01:21:12,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:21:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1945 transitions. [2022-03-18 01:21:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 01:21:12,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:21:12,197 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:21:12,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 01:21:12,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:21:12,411 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:21:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:21:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 33 times [2022-03-18 01:21:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:21:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583554883] [2022-03-18 01:21:12,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:21:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 34 times [2022-03-18 01:21:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:21:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509781695] [2022-03-18 01:21:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:21:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:21:12,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:21:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898849344] [2022-03-18 01:21:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:21:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:21:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:21:12,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:21:12,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 01:21:12,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:21:12,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:21:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-18 01:21:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:21:14,250 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:21:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 162 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 01:21:40,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:21:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-03-18 01:21:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:21:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509781695] [2022-03-18 01:21:54,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:21:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898849344] [2022-03-18 01:21:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898849344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:21:54,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:21:54,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-03-18 01:21:54,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:21:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583554883] [2022-03-18 01:21:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583554883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:21:54,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:21:54,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 01:21:54,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64955147] [2022-03-18 01:21:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:21:54,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 01:21:54,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:21:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 01:21:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 01:21:54,625 INFO L87 Difference]: Start difference. First operand 1343 states and 1945 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:22:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:01,199 INFO L93 Difference]: Finished difference Result 1394 states and 2012 transitions. [2022-03-18 01:22:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 01:22:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 132 [2022-03-18 01:22:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:01,205 INFO L225 Difference]: With dead ends: 1394 [2022-03-18 01:22:01,205 INFO L226 Difference]: Without dead ends: 1387 [2022-03-18 01:22:01,206 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 01:22:01,206 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 636 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:01,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1166 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 560 Invalid, 0 Unknown, 636 Unchecked, 1.2s Time] [2022-03-18 01:22:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-18 01:22:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1366. [2022-03-18 01:22:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 763 states have (on average 1.2201834862385321) internal successors, (931), 792 states have internal predecessors, (931), 525 states have call successors, (525), 78 states have call predecessors, (525), 77 states have return successors, (523), 495 states have call predecessors, (523), 523 states have call successors, (523) [2022-03-18 01:22:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1979 transitions. [2022-03-18 01:22:01,807 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1979 transitions. Word has length 132 [2022-03-18 01:22:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:01,808 INFO L478 AbstractCegarLoop]: Abstraction has 1366 states and 1979 transitions. [2022-03-18 01:22:01,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:22:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1979 transitions. [2022-03-18 01:22:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 01:22:01,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:01,811 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:01,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 01:22:02,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 01:22:02,036 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 35 times [2022-03-18 01:22:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560494314] [2022-03-18 01:22:02,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 36 times [2022-03-18 01:22:02,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:02,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048210921] [2022-03-18 01:22:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:02,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484176989] [2022-03-18 01:22:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:22:02,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:02,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:02,045 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:22:02,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 01:22:02,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 01:22:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:22:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 01:22:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-18 01:22:08,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:22:15,203 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:22:20,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:20,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048210921] [2022-03-18 01:22:20,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:20,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484176989] [2022-03-18 01:22:20,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484176989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:22:20,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:22:20,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-18 01:22:20,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560494314] [2022-03-18 01:22:20,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560494314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:20,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:20,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 01:22:20,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550454308] [2022-03-18 01:22:20,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:20,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 01:22:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 01:22:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 01:22:20,181 INFO L87 Difference]: Start difference. First operand 1366 states and 1979 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:22:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:30,513 INFO L93 Difference]: Finished difference Result 1491 states and 2148 transitions. [2022-03-18 01:22:30,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 01:22:30,514 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 135 [2022-03-18 01:22:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:30,519 INFO L225 Difference]: With dead ends: 1491 [2022-03-18 01:22:30,519 INFO L226 Difference]: Without dead ends: 1488 [2022-03-18 01:22:30,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 01:22:30,521 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 111 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:30,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1051 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-18 01:22:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-03-18 01:22:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1448. [2022-03-18 01:22:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 810 states have (on average 1.2185185185185186) internal successors, (987), 840 states have internal predecessors, (987), 555 states have call successors, (555), 83 states have call predecessors, (555), 82 states have return successors, (553), 524 states have call predecessors, (553), 553 states have call successors, (553) [2022-03-18 01:22:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2095 transitions. [2022-03-18 01:22:31,054 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2095 transitions. Word has length 135 [2022-03-18 01:22:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:31,055 INFO L478 AbstractCegarLoop]: Abstraction has 1448 states and 2095 transitions. [2022-03-18 01:22:31,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:22:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2095 transitions. [2022-03-18 01:22:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 01:22:31,057 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:31,057 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:31,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 01:22:31,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 01:22:31,282 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 37 times [2022-03-18 01:22:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012856732] [2022-03-18 01:22:31,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 38 times [2022-03-18 01:22:31,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518282390] [2022-03-18 01:22:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:31,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779930547] [2022-03-18 01:22:31,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:22:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:31,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:31,291 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:22:31,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 01:22:31,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:22:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:22:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-18 01:22:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 99 proven. 182 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-18 01:22:34,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:22:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 170 proven. 52 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-18 01:22:41,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518282390] [2022-03-18 01:22:41,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779930547] [2022-03-18 01:22:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779930547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:22:41,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:22:41,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-18 01:22:41,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012856732] [2022-03-18 01:22:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012856732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:41,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:41,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 01:22:41,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342968841] [2022-03-18 01:22:41,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:41,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 01:22:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 01:22:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 01:22:41,324 INFO L87 Difference]: Start difference. First operand 1448 states and 2095 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:22:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:46,534 INFO L93 Difference]: Finished difference Result 1574 states and 2264 transitions. [2022-03-18 01:22:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 01:22:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 135 [2022-03-18 01:22:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:46,541 INFO L225 Difference]: With dead ends: 1574 [2022-03-18 01:22:46,541 INFO L226 Difference]: Without dead ends: 1571 [2022-03-18 01:22:46,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 01:22:46,542 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 95 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:46,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 902 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 01:22:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-03-18 01:22:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1524. [2022-03-18 01:22:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 853 states have (on average 1.2180539273153577) internal successors, (1039), 885 states have internal predecessors, (1039), 583 states have call successors, (583), 88 states have call predecessors, (583), 87 states have return successors, (581), 550 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-18 01:22:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2203 transitions. [2022-03-18 01:22:47,142 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2203 transitions. Word has length 135 [2022-03-18 01:22:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:47,142 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 2203 transitions. [2022-03-18 01:22:47,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 01:22:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2203 transitions. [2022-03-18 01:22:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 01:22:47,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:47,144 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:47,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 01:22:47,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 01:22:47,344 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 5 times [2022-03-18 01:22:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143878520] [2022-03-18 01:22:47,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 6 times [2022-03-18 01:22:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949818262] [2022-03-18 01:22:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:47,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:47,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250189017] [2022-03-18 01:22:47,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:22:47,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:47,353 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:22:47,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 01:22:47,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:22:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:22:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 01:22:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-18 01:22:48,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:22:50,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:50,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949818262] [2022-03-18 01:22:50,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:50,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250189017] [2022-03-18 01:22:50,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250189017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:22:50,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:22:50,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 01:22:50,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:50,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2143878520] [2022-03-18 01:22:50,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2143878520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:50,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:50,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 01:22:50,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536881250] [2022-03-18 01:22:50,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:50,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 01:22:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:50,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 01:22:50,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:22:50,844 INFO L87 Difference]: Start difference. First operand 1524 states and 2203 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 01:23:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:23:12,215 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-18 01:23:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 01:23:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 140 [2022-03-18 01:23:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:23:12,222 INFO L225 Difference]: With dead ends: 1668 [2022-03-18 01:23:12,222 INFO L226 Difference]: Without dead ends: 1666 [2022-03-18 01:23:12,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=241, Invalid=1086, Unknown=5, NotChecked=0, Total=1332 [2022-03-18 01:23:12,223 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 80 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:23:12,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 455 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 583 Invalid, 0 Unknown, 70 Unchecked, 1.5s Time] [2022-03-18 01:23:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-03-18 01:23:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1536. [2022-03-18 01:23:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 862 states have (on average 1.216937354988399) internal successors, (1049), 895 states have internal predecessors, (1049), 585 states have call successors, (585), 89 states have call predecessors, (585), 88 states have return successors, (583), 551 states have call predecessors, (583), 583 states have call successors, (583) [2022-03-18 01:23:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2217 transitions. [2022-03-18 01:23:12,933 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2217 transitions. Word has length 140 [2022-03-18 01:23:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:23:12,934 INFO L478 AbstractCegarLoop]: Abstraction has 1536 states and 2217 transitions. [2022-03-18 01:23:12,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 01:23:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2217 transitions. [2022-03-18 01:23:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 01:23:12,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:23:12,936 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:23:12,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 01:23:13,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-18 01:23:13,136 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:23:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:23:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 39 times [2022-03-18 01:23:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906754548] [2022-03-18 01:23:13,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:23:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 40 times [2022-03-18 01:23:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:23:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611869765] [2022-03-18 01:23:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:23:13,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:23:13,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:23:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804640975] [2022-03-18 01:23:13,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:23:13,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:23:13,143 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:23:13,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 01:23:13,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:23:13,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:23:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 01:23:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:23:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 01:23:16,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:23:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-18 01:23:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:23:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611869765] [2022-03-18 01:23:23,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:23:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804640975] [2022-03-18 01:23:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804640975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:23:23,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:23:23,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 34 [2022-03-18 01:23:23,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:23:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906754548] [2022-03-18 01:23:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906754548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:23:23,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:23:23,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 01:23:23,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889160581] [2022-03-18 01:23:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:23:23,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 01:23:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 01:23:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 01:23:23,381 INFO L87 Difference]: Start difference. First operand 1536 states and 2217 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:23:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:23:33,339 INFO L93 Difference]: Finished difference Result 1739 states and 2500 transitions. [2022-03-18 01:23:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 01:23:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 140 [2022-03-18 01:23:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:23:33,347 INFO L225 Difference]: With dead ends: 1739 [2022-03-18 01:23:33,347 INFO L226 Difference]: Without dead ends: 1732 [2022-03-18 01:23:33,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 01:23:33,348 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 115 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:23:33,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1249 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-18 01:23:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-03-18 01:23:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1584. [2022-03-18 01:23:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 892 states have (on average 1.2141255605381165) internal successors, (1083), 926 states have internal predecessors, (1083), 599 states have call successors, (599), 93 states have call predecessors, (599), 92 states have return successors, (597), 564 states have call predecessors, (597), 597 states have call successors, (597) [2022-03-18 01:23:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2279 transitions. [2022-03-18 01:23:34,168 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2279 transitions. Word has length 140 [2022-03-18 01:23:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:23:34,168 INFO L478 AbstractCegarLoop]: Abstraction has 1584 states and 2279 transitions. [2022-03-18 01:23:34,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 01:23:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2279 transitions. [2022-03-18 01:23:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 01:23:34,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:23:34,170 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:23:34,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 01:23:34,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:34,372 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:23:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:23:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 41 times [2022-03-18 01:23:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234599957] [2022-03-18 01:23:34,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:23:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 42 times [2022-03-18 01:23:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:23:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127730938] [2022-03-18 01:23:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:23:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:23:34,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:23:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870818613] [2022-03-18 01:23:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:23:34,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:23:34,381 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:23:34,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 01:23:34,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 01:23:34,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:23:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 01:23:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:23:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-18 01:23:37,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:23:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-18 01:23:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:23:45,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127730938] [2022-03-18 01:23:45,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:23:45,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870818613] [2022-03-18 01:23:45,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870818613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:23:45,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:23:45,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-03-18 01:23:45,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:23:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234599957] [2022-03-18 01:23:45,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234599957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:23:45,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:23:45,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 01:23:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467099128] [2022-03-18 01:23:45,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:23:45,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 01:23:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 01:23:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 01:23:45,334 INFO L87 Difference]: Start difference. First operand 1584 states and 2279 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-18 01:23:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:23:49,581 INFO L93 Difference]: Finished difference Result 1905 states and 2730 transitions. [2022-03-18 01:23:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 01:23:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 144 [2022-03-18 01:23:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:23:49,587 INFO L225 Difference]: With dead ends: 1905 [2022-03-18 01:23:49,587 INFO L226 Difference]: Without dead ends: 1675 [2022-03-18 01:23:49,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 01:23:49,589 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 61 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:23:49,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 651 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 01:23:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-03-18 01:23:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1657. [2022-03-18 01:23:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 934 states have (on average 1.2130620985010707) internal successors, (1133), 971 states have internal predecessors, (1133), 626 states have call successors, (626), 97 states have call predecessors, (626), 96 states have return successors, (624), 588 states have call predecessors, (624), 624 states have call successors, (624) [2022-03-18 01:23:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2383 transitions. [2022-03-18 01:23:50,376 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2383 transitions. Word has length 144 [2022-03-18 01:23:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:23:50,376 INFO L478 AbstractCegarLoop]: Abstraction has 1657 states and 2383 transitions. [2022-03-18 01:23:50,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-18 01:23:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2383 transitions. [2022-03-18 01:23:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 01:23:50,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:23:50,378 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:23:50,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 01:23:50,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:50,587 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:23:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:23:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 43 times [2022-03-18 01:23:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633640710] [2022-03-18 01:23:50,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:23:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 44 times [2022-03-18 01:23:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:23:50,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634488718] [2022-03-18 01:23:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:23:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:23:50,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:23:50,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539276400] [2022-03-18 01:23:50,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:23:50,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:23:50,599 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:23:50,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 01:23:50,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:23:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:23:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 01:23:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates...