/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:27:39,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:27:39,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:27:39,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:27:39,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:27:39,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:27:39,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:27:39,734 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 02:27:39,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:27:39,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:27:39,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:27:39,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:27:39,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:27:39,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:27:39,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:27:39,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:27:39,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:27:39,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:27:39,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:27:39,748 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:27:39,749 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:27:39,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:27:39,749 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:27:39,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:27:39,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:27:39,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:27:39,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:27:39,946 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:27:39,946 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:27:39,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-18 02:27:39,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb52c6089/38ae2b48ec5644cb8b6eb1667ae54aaa/FLAGf292b733b [2022-03-18 02:27:40,294 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:27:40,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2022-03-18 02:27:40,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb52c6089/38ae2b48ec5644cb8b6eb1667ae54aaa/FLAGf292b733b [2022-03-18 02:27:40,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb52c6089/38ae2b48ec5644cb8b6eb1667ae54aaa [2022-03-18 02:27:40,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:27:40,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:27:40,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:27:40,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:27:40,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:27:40,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be6a0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40, skipping insertion in model container [2022-03-18 02:27:40,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:27:40,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:27:40,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2022-03-18 02:27:40,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:27:40,913 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:27:40,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2022-03-18 02:27:40,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:27:40,941 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:27:40,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40 WrapperNode [2022-03-18 02:27:40,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:27:40,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:27:40,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:27:40,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:27:40,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:27:40,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:27:40,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:27:40,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:27:40,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (1/1) ... [2022-03-18 02:27:40,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:27:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:41,008 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 02:27:41,010 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 02:27:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:27:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:27:41,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:27:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:27:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:27:41,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:27:41,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:27:41,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:27:41,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:27:41,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:27:41,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:27:41,045 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:27:41,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:27:41,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:27:41,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:27:41,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:27:41,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:27:41,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:27:41,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:27:41,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:27:41,097 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:27:41,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:27:41,202 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:27:41,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:27:41,207 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 02:27:41,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:27:41 BoogieIcfgContainer [2022-03-18 02:27:41,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:27:41,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:27:41,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:27:41,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:27:41,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:27:40" (1/3) ... [2022-03-18 02:27:41,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6147b17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:27:41, skipping insertion in model container [2022-03-18 02:27:41,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:27:40" (2/3) ... [2022-03-18 02:27:41,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6147b17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:27:41, skipping insertion in model container [2022-03-18 02:27:41,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:27:41" (3/3) ... [2022-03-18 02:27:41,214 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2022-03-18 02:27:41,217 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:27:41,217 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:27:41,245 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:27:41,249 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 02:27:41,249 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:27:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:27:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 02:27:41,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:41,265 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 02:27:41,266 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2022-03-18 02:27:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:41,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922492937] [2022-03-18 02:27:41,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 2 times [2022-03-18 02:27:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:41,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860896775] [2022-03-18 02:27:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:27:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:27:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:27:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,511 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 02:27:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860896775] [2022-03-18 02:27:41,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860896775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:41,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:41,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:27:41,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:41,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922492937] [2022-03-18 02:27:41,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922492937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:41,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:41,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:27:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781993422] [2022-03-18 02:27:41,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:41,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:27:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:27:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:27:41,547 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:27:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:41,644 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2022-03-18 02:27:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:27:41,647 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 02:27:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:41,656 INFO L225 Difference]: With dead ends: 64 [2022-03-18 02:27:41,657 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 02:27:41,660 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 02:27:41,662 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:41,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 02:27:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-18 02:27:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:27:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 02:27:41,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-03-18 02:27:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:41,703 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 02:27:41,704 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 02:27:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 02:27:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:27:41,706 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:41,706 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 02:27:41,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:27:41,707 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2022-03-18 02:27:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:41,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171293836] [2022-03-18 02:27:41,716 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 2 times [2022-03-18 02:27:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028267785] [2022-03-18 02:27:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:27:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:27:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:27:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:27:41,793 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 02:27:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028267785] [2022-03-18 02:27:41,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028267785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:41,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:41,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:41,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:41,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171293836] [2022-03-18 02:27:41,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171293836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:41,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:41,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:41,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862600798] [2022-03-18 02:27:41,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:41,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:41,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:41,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:41,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:27:41,796 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:27:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:41,881 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-18 02:27:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:27:41,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 02:27:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:41,882 INFO L225 Difference]: With dead ends: 42 [2022-03-18 02:27:41,883 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 02:27:41,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:27:41,884 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:41,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 02:27:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 02:27:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:27:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 02:27:41,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-03-18 02:27:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:41,892 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 02:27:41,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:27:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 02:27:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:27:41,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:41,893 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 02:27:41,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 02:27:41,893 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2022-03-18 02:27:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1602107518] [2022-03-18 02:27:41,895 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 2 times [2022-03-18 02:27:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:41,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773646879] [2022-03-18 02:27:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:41,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:41,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904838638] [2022-03-18 02:27:41,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:41,914 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 02:27:41,915 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 02:27:41,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:27:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:27:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:42,131 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 02:27:42,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:27:42,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:42,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773646879] [2022-03-18 02:27:42,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:42,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904838638] [2022-03-18 02:27:42,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904838638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:42,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:42,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:42,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:42,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1602107518] [2022-03-18 02:27:42,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1602107518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:42,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:42,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122628775] [2022-03-18 02:27:42,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:42,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:27:42,134 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:27:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:42,189 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-18 02:27:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 02:27:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:42,190 INFO L225 Difference]: With dead ends: 49 [2022-03-18 02:27:42,190 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 02:27:42,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:27:42,192 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:42,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 02:27:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-18 02:27:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:27:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-03-18 02:27:42,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-03-18 02:27:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:42,204 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-03-18 02:27:42,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 02:27:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-03-18 02:27:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 02:27:42,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:42,205 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 02:27:42,235 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 02:27:42,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:42,406 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2022-03-18 02:27:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:42,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728406086] [2022-03-18 02:27:42,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 2 times [2022-03-18 02:27:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741134008] [2022-03-18 02:27:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:42,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:42,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275773090] [2022-03-18 02:27:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:42,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:42,423 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 02:27:42,428 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 02:27:42,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:42,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:27:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:27:42,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:27:42,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741134008] [2022-03-18 02:27:42,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275773090] [2022-03-18 02:27:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275773090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:42,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:42,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:42,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:42,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728406086] [2022-03-18 02:27:42,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728406086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:42,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:42,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732907800] [2022-03-18 02:27:42,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:42,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:42,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:27:42,598 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 02:27:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:42,649 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-03-18 02:27:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:42,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 02:27:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:42,652 INFO L225 Difference]: With dead ends: 53 [2022-03-18 02:27:42,653 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 02:27:42,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:27:42,664 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:42,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 02:27:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 02:27:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:27:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-03-18 02:27:42,679 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-03-18 02:27:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:42,679 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-03-18 02:27:42,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 02:27:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-03-18 02:27:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 02:27:42,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:42,681 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] [2022-03-18 02:27:42,716 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 02:27:42,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 02:27:42,917 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2022-03-18 02:27:42,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:42,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104267283] [2022-03-18 02:27:42,918 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 2 times [2022-03-18 02:27:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702091903] [2022-03-18 02:27:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:42,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:42,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002062246] [2022-03-18 02:27:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:42,929 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 02:27:42,930 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 02:27:42,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:27:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 02:27:43,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 02:27:43,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702091903] [2022-03-18 02:27:43,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002062246] [2022-03-18 02:27:43,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002062246] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:27:43,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:27:43,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 02:27:43,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104267283] [2022-03-18 02:27:43,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104267283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:43,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:43,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:43,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017872078] [2022-03-18 02:27:43,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:43,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:43,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:27:43,208 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:27:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:43,254 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-03-18 02:27:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-18 02:27:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:43,257 INFO L225 Difference]: With dead ends: 75 [2022-03-18 02:27:43,257 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 02:27:43,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:27:43,258 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:43,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 02:27:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 02:27:43,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 02:27:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-03-18 02:27:43,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-03-18 02:27:43,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:43,268 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-03-18 02:27:43,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:27:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-03-18 02:27:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 02:27:43,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:43,269 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] [2022-03-18 02:27:43,301 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 02:27:43,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:43,487 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2022-03-18 02:27:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [144630382] [2022-03-18 02:27:43,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 2 times [2022-03-18 02:27:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347539582] [2022-03-18 02:27:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:43,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138654966] [2022-03-18 02:27:43,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:43,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:43,498 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 02:27:43,515 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 02:27:43,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:27:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:43,601 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 02:27:43,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:27:43,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347539582] [2022-03-18 02:27:43,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138654966] [2022-03-18 02:27:43,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138654966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:43,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:43,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:43,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [144630382] [2022-03-18 02:27:43,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [144630382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:43,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:43,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981738995] [2022-03-18 02:27:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:43,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:43,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:27:43,604 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 02:27:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:43,634 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2022-03-18 02:27:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-03-18 02:27:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:43,635 INFO L225 Difference]: With dead ends: 87 [2022-03-18 02:27:43,636 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 02:27:43,636 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:27:43,636 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:43,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 02:27:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-03-18 02:27:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:27:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-03-18 02:27:43,645 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-03-18 02:27:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:43,646 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-03-18 02:27:43,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 02:27:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-03-18 02:27:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:27:43,646 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:43,647 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:43,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 02:27:43,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:43,865 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2022-03-18 02:27:43,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:43,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296655619] [2022-03-18 02:27:43,866 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 2 times [2022-03-18 02:27:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:43,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271158135] [2022-03-18 02:27:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:43,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:43,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759596333] [2022-03-18 02:27:43,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:43,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:43,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:43,891 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 02:27:43,892 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 02:27:43,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:27:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:27:44,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:27:44,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271158135] [2022-03-18 02:27:44,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:44,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759596333] [2022-03-18 02:27:44,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759596333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:44,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:44,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 02:27:44,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:44,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296655619] [2022-03-18 02:27:44,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296655619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:44,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:44,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82813839] [2022-03-18 02:27:44,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:44,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:44,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:27:44,109 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 02:27:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:44,153 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-18 02:27:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:27:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-18 02:27:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:44,155 INFO L225 Difference]: With dead ends: 121 [2022-03-18 02:27:44,155 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 02:27:44,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:27:44,156 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:44,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 02:27:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-03-18 02:27:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 13 states have call predecessors, (31), 11 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:27:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2022-03-18 02:27:44,168 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 42 [2022-03-18 02:27:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:44,168 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2022-03-18 02:27:44,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 02:27:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2022-03-18 02:27:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:27:44,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:44,169 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:44,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 02:27:44,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:44,390 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:44,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 1 times [2022-03-18 02:27:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:44,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692151926] [2022-03-18 02:27:44,391 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1083409702, now seen corresponding path program 2 times [2022-03-18 02:27:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771861736] [2022-03-18 02:27:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:44,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:44,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:44,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478650633] [2022-03-18 02:27:44,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:44,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:44,401 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 02:27:44,402 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 02:27:44,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:44,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:27:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:27:44,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:27:44,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:44,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771861736] [2022-03-18 02:27:44,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:44,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478650633] [2022-03-18 02:27:44,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478650633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:44,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:44,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:44,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692151926] [2022-03-18 02:27:44,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692151926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:44,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:44,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:44,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101463882] [2022-03-18 02:27:44,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:44,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:44,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:27:44,568 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:27:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:44,603 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2022-03-18 02:27:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-18 02:27:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:44,604 INFO L225 Difference]: With dead ends: 106 [2022-03-18 02:27:44,604 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 02:27:44,605 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:27:44,605 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:44,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 02:27:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 02:27:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 02:27:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2022-03-18 02:27:44,614 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2022-03-18 02:27:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:44,615 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2022-03-18 02:27:44,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:27:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2022-03-18 02:27:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:27:44,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:44,615 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:44,649 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 02:27:44,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:44,831 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2022-03-18 02:27:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1622873740] [2022-03-18 02:27:44,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 2 times [2022-03-18 02:27:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:44,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419673050] [2022-03-18 02:27:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:44,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263404490] [2022-03-18 02:27:44,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:44,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:44,847 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 02:27:44,848 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 02:27:44,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 02:27:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:27:44,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:27:45,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419673050] [2022-03-18 02:27:45,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263404490] [2022-03-18 02:27:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263404490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:45,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:45,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:27:45,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1622873740] [2022-03-18 02:27:45,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1622873740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:45,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:45,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:27:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097715515] [2022-03-18 02:27:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:45,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:27:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:27:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:27:45,182 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:27:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:45,306 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2022-03-18 02:27:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:27:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-18 02:27:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:45,308 INFO L225 Difference]: With dead ends: 118 [2022-03-18 02:27:45,308 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 02:27:45,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:27:45,309 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:45,309 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 147 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 02:27:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-18 02:27:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 02:27:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-03-18 02:27:45,318 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2022-03-18 02:27:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:45,319 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-03-18 02:27:45,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:27:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-03-18 02:27:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 02:27:45,319 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:45,319 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:45,352 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 02:27:45,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:45,536 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 3 times [2022-03-18 02:27:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:45,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64838796] [2022-03-18 02:27:45,537 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 4 times [2022-03-18 02:27:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:45,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104847300] [2022-03-18 02:27:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:45,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:45,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563297964] [2022-03-18 02:27:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:27:45,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:45,545 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 02:27:45,547 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 02:27:45,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:27:45,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:27:45,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:27:45,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:27:45,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104847300] [2022-03-18 02:27:45,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563297964] [2022-03-18 02:27:45,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563297964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:45,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:45,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-18 02:27:45,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64838796] [2022-03-18 02:27:45,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64838796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:45,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:45,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:27:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318331144] [2022-03-18 02:27:45,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:45,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:27:45,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:27:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:27:45,772 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:27:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:45,826 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-18 02:27:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:27:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-03-18 02:27:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:45,828 INFO L225 Difference]: With dead ends: 131 [2022-03-18 02:27:45,828 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 02:27:45,828 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:27:45,829 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:45,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 210 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 02:27:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-18 02:27:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 02:27:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-03-18 02:27:45,839 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2022-03-18 02:27:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:45,840 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-03-18 02:27:45,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:27:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-03-18 02:27:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 02:27:45,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:45,840 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:45,873 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 02:27:46,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:27:46,058 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 1 times [2022-03-18 02:27:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [121603470] [2022-03-18 02:27:46,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2022-03-18 02:27:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109910586] [2022-03-18 02:27:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:46,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245086561] [2022-03-18 02:27:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:46,067 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 02:27:46,068 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 02:27:46,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:46,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:27:46,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:27:46,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:27:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109910586] [2022-03-18 02:27:46,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245086561] [2022-03-18 02:27:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245086561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:46,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 02:27:46,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [121603470] [2022-03-18 02:27:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [121603470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:46,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:46,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:27:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766704894] [2022-03-18 02:27:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:46,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:27:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:27:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:27:46,481 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 02:27:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:46,647 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-03-18 02:27:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:27:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2022-03-18 02:27:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:46,648 INFO L225 Difference]: With dead ends: 160 [2022-03-18 02:27:46,648 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 02:27:46,649 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:46,649 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:46,649 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 02:27:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-18 02:27:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:27:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-03-18 02:27:46,662 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 52 [2022-03-18 02:27:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:46,662 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-03-18 02:27:46,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 02:27:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-03-18 02:27:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:27:46,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:46,663 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] [2022-03-18 02:27:46,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 02:27:46,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:46,880 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 3 times [2022-03-18 02:27:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858931223] [2022-03-18 02:27:46,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 4 times [2022-03-18 02:27:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674674702] [2022-03-18 02:27:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:46,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556944235] [2022-03-18 02:27:46,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:27:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:46,904 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 02:27:46,905 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 02:27:46,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:27:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:27:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:27:47,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:27:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674674702] [2022-03-18 02:27:47,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556944235] [2022-03-18 02:27:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556944235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:47,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:47,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 02:27:47,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858931223] [2022-03-18 02:27:47,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858931223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:47,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:47,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:27:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934350920] [2022-03-18 02:27:47,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:47,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:27:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:27:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:27:47,120 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:27:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:47,169 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2022-03-18 02:27:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:27:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-18 02:27:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:47,171 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:27:47,171 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 02:27:47,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:27:47,187 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:47,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 02:27:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-18 02:27:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 02:27:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2022-03-18 02:27:47,206 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2022-03-18 02:27:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:47,207 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2022-03-18 02:27:47,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:27:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2022-03-18 02:27:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 02:27:47,207 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:47,208 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:47,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 02:27:47,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 02:27:47,424 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2022-03-18 02:27:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020098073] [2022-03-18 02:27:47,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 2 times [2022-03-18 02:27:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:47,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333052882] [2022-03-18 02:27:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:47,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:47,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232141649] [2022-03-18 02:27:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:47,437 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 02:27:47,438 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 02:27:47,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:47,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:27:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:27:47,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-18 02:27:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333052882] [2022-03-18 02:27:47,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232141649] [2022-03-18 02:27:47,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232141649] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:27:47,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:27:47,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-18 02:27:47,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020098073] [2022-03-18 02:27:47,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020098073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:47,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:47,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:27:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822312583] [2022-03-18 02:27:47,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:47,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:27:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:27:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:27:47,803 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 02:27:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:47,839 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2022-03-18 02:27:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:27:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-03-18 02:27:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:47,841 INFO L225 Difference]: With dead ends: 179 [2022-03-18 02:27:47,841 INFO L226 Difference]: Without dead ends: 174 [2022-03-18 02:27:47,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:27:47,841 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:47,842 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-18 02:27:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-03-18 02:27:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 114 states have internal predecessors, (125), 43 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (40), 35 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 02:27:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-03-18 02:27:47,856 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 61 [2022-03-18 02:27:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:47,856 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-03-18 02:27:47,856 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 02:27:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-03-18 02:27:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 02:27:47,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:47,857 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:47,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 02:27:48,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 02:27:48,076 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 5 times [2022-03-18 02:27:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046279424] [2022-03-18 02:27:48,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 6 times [2022-03-18 02:27:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993648958] [2022-03-18 02:27:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:48,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932627711] [2022-03-18 02:27:48,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:27:48,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:48,085 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 02:27:48,086 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 02:27:48,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:27:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 02:27:48,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-18 02:27:48,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-18 02:27:48,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:48,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993648958] [2022-03-18 02:27:48,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:48,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932627711] [2022-03-18 02:27:48,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932627711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:48,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:48,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:27:48,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:48,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046279424] [2022-03-18 02:27:48,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046279424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:48,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:48,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:27:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134919416] [2022-03-18 02:27:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:48,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:27:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:48,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:27:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:48,693 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:27:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:48,878 INFO L93 Difference]: Finished difference Result 199 states and 247 transitions. [2022-03-18 02:27:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:27:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-18 02:27:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:48,880 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:27:48,880 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 02:27:48,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:27:48,881 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:48,881 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 242 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 02:27:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2022-03-18 02:27:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 119 states have internal predecessors, (131), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 02:27:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-03-18 02:27:48,895 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 66 [2022-03-18 02:27:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:48,895 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-03-18 02:27:48,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:27:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-03-18 02:27:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 02:27:48,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:48,896 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:48,933 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 02:27:49,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 02:27:49,113 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2022-03-18 02:27:49,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632377419] [2022-03-18 02:27:49,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 4 times [2022-03-18 02:27:49,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087023625] [2022-03-18 02:27:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:49,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:49,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649478582] [2022-03-18 02:27:49,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:27:49,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:49,121 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 02:27:49,122 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 02:27:49,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:27:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:27:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 02:27:49,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-18 02:27:49,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:49,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087023625] [2022-03-18 02:27:49,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:49,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649478582] [2022-03-18 02:27:49,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649478582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:49,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:49,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:27:49,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:49,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632377419] [2022-03-18 02:27:49,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632377419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:49,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:49,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:27:49,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639474850] [2022-03-18 02:27:49,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:49,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:27:49,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:27:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:49,729 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:27:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:49,912 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-03-18 02:27:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:27:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2022-03-18 02:27:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:49,914 INFO L225 Difference]: With dead ends: 208 [2022-03-18 02:27:49,914 INFO L226 Difference]: Without dead ends: 206 [2022-03-18 02:27:49,914 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:27:49,914 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:49,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 268 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:27:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-18 02:27:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2022-03-18 02:27:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 49 states have call successors, (49), 24 states have call predecessors, (49), 23 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-18 02:27:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2022-03-18 02:27:49,955 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 66 [2022-03-18 02:27:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:49,956 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2022-03-18 02:27:49,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 02:27:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2022-03-18 02:27:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 02:27:49,956 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:49,957 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:49,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 02:27:50,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 02:27:50,170 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:50,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 5 times [2022-03-18 02:27:50,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:50,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665241107] [2022-03-18 02:27:50,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 6 times [2022-03-18 02:27:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:50,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125577002] [2022-03-18 02:27:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:50,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:50,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96889397] [2022-03-18 02:27:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:27:50,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:50,192 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 02:27:50,193 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 02:27:50,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:27:50,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 02:27:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:27:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 02:27:50,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125577002] [2022-03-18 02:27:50,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96889397] [2022-03-18 02:27:50,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96889397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:50,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:50,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 02:27:50,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665241107] [2022-03-18 02:27:50,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665241107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:50,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:50,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:27:50,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924616629] [2022-03-18 02:27:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:50,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:27:50,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:27:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:50,737 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 02:27:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:50,989 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2022-03-18 02:27:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:27:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-03-18 02:27:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:50,991 INFO L225 Difference]: With dead ends: 214 [2022-03-18 02:27:50,991 INFO L226 Difference]: Without dead ends: 208 [2022-03-18 02:27:50,991 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:27:50,992 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:50,992 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 261 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:27:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-18 02:27:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2022-03-18 02:27:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.170940170940171) internal successors, (137), 125 states have internal predecessors, (137), 51 states have call successors, (51), 24 states have call predecessors, (51), 23 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-18 02:27:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2022-03-18 02:27:51,014 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 71 [2022-03-18 02:27:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:51,014 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2022-03-18 02:27:51,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-18 02:27:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2022-03-18 02:27:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 02:27:51,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:51,016 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:51,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 02:27:51,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:51,234 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2022-03-18 02:27:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925917918] [2022-03-18 02:27:51,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 4 times [2022-03-18 02:27:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347237654] [2022-03-18 02:27:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:51,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802829114] [2022-03-18 02:27:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:27:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:51,264 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 02:27:51,315 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 02:27:51,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:27:51,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 02:27:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:27:51,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 35 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:27:51,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347237654] [2022-03-18 02:27:51,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802829114] [2022-03-18 02:27:51,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802829114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:51,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:51,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 02:27:51,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:51,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925917918] [2022-03-18 02:27:51,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925917918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:51,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:51,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:27:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774389924] [2022-03-18 02:27:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:51,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:27:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:27:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:51,949 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:27:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:52,154 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2022-03-18 02:27:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:27:52,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2022-03-18 02:27:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:52,155 INFO L225 Difference]: With dead ends: 219 [2022-03-18 02:27:52,155 INFO L226 Difference]: Without dead ends: 210 [2022-03-18 02:27:52,156 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:27:52,156 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:52,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 220 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:27:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-18 02:27:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-03-18 02:27:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 25 states have call predecessors, (57), 24 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 02:27:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2022-03-18 02:27:52,175 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 71 [2022-03-18 02:27:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:52,176 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2022-03-18 02:27:52,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:27:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2022-03-18 02:27:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 02:27:52,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:52,176 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:52,196 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 02:27:52,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 02:27:52,394 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 5 times [2022-03-18 02:27:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:52,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333741403] [2022-03-18 02:27:52,395 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 6 times [2022-03-18 02:27:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:52,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956176920] [2022-03-18 02:27:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:52,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445498601] [2022-03-18 02:27:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:27:52,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:52,407 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 02:27:52,408 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 02:27:52,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 02:27:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:27:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 02:27:52,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 02:27:52,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956176920] [2022-03-18 02:27:52,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445498601] [2022-03-18 02:27:52,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445498601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:52,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:52,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 02:27:52,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:52,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333741403] [2022-03-18 02:27:52,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333741403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:52,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:52,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:27:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568606342] [2022-03-18 02:27:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:52,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:27:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:27:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:27:52,727 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:27:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:52,794 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2022-03-18 02:27:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:27:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-03-18 02:27:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:52,796 INFO L225 Difference]: With dead ends: 277 [2022-03-18 02:27:52,796 INFO L226 Difference]: Without dead ends: 250 [2022-03-18 02:27:52,796 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:27:52,797 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:52,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:27:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-18 02:27:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 229. [2022-03-18 02:27:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 146 states have (on average 1.143835616438356) internal successors, (167), 153 states have internal predecessors, (167), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 02:27:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-03-18 02:27:52,818 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 80 [2022-03-18 02:27:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:52,820 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-03-18 02:27:52,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 02:27:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-03-18 02:27:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:27:52,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:52,821 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:52,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:27:53,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 02:27:53,038 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 7 times [2022-03-18 02:27:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991893973] [2022-03-18 02:27:53,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 8 times [2022-03-18 02:27:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244288701] [2022-03-18 02:27:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:53,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:53,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713771304] [2022-03-18 02:27:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:53,046 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 02:27:53,047 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 02:27:53,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:27:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-18 02:27:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:27:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244288701] [2022-03-18 02:27:53,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713771304] [2022-03-18 02:27:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713771304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:53,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-18 02:27:53,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991893973] [2022-03-18 02:27:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991893973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:53,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:27:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691217630] [2022-03-18 02:27:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:53,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:27:53,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:27:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:27:53,880 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:54,118 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2022-03-18 02:27:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:27:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:27:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:54,120 INFO L225 Difference]: With dead ends: 256 [2022-03-18 02:27:54,120 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 02:27:54,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:27:54,121 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:54,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 374 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:27:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 02:27:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2022-03-18 02:27:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 02:27:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 280 transitions. [2022-03-18 02:27:54,140 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 280 transitions. Word has length 85 [2022-03-18 02:27:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:54,140 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 280 transitions. [2022-03-18 02:27:54,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 280 transitions. [2022-03-18 02:27:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:27:54,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:54,141 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:54,175 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 02:27:54,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:54,356 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2022-03-18 02:27:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:54,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251698516] [2022-03-18 02:27:54,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 8 times [2022-03-18 02:27:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537717229] [2022-03-18 02:27:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:54,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:54,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:54,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440144651] [2022-03-18 02:27:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:27:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:54,365 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 02:27:54,366 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 02:27:54,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:27:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:27:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:27:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:27:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537717229] [2022-03-18 02:27:55,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:55,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440144651] [2022-03-18 02:27:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440144651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:55,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:55,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-18 02:27:55,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251698516] [2022-03-18 02:27:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251698516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:55,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:27:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029879612] [2022-03-18 02:27:55,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:55,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:27:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:27:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:27:55,199 INFO L87 Difference]: Start difference. First operand 238 states and 280 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:55,397 INFO L93 Difference]: Finished difference Result 286 states and 341 transitions. [2022-03-18 02:27:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:27:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:27:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:55,400 INFO L225 Difference]: With dead ends: 286 [2022-03-18 02:27:55,400 INFO L226 Difference]: Without dead ends: 284 [2022-03-18 02:27:55,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:27:55,401 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:55,401 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 346 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:27:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-18 02:27:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2022-03-18 02:27:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 178 states have internal predecessors, (195), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-18 02:27:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 314 transitions. [2022-03-18 02:27:55,426 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 314 transitions. Word has length 85 [2022-03-18 02:27:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:55,426 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 314 transitions. [2022-03-18 02:27:55,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 314 transitions. [2022-03-18 02:27:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:27:55,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:55,427 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:55,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:27:55,645 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:55,645 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 9 times [2022-03-18 02:27:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2122370547] [2022-03-18 02:27:55,646 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 10 times [2022-03-18 02:27:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378792337] [2022-03-18 02:27:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:55,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954023416] [2022-03-18 02:27:55,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:27:55,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:55,655 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 02:27:55,687 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 02:27:55,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:27:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:55,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 02:27:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 65 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 02:27:56,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-18 02:27:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:27:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378792337] [2022-03-18 02:27:56,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:27:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954023416] [2022-03-18 02:27:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954023416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:27:56,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:27:56,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 02:27:56,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:27:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2122370547] [2022-03-18 02:27:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2122370547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:27:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:27:56,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:27:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151710301] [2022-03-18 02:27:56,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:27:56,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:27:56,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:27:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:27:56,409 INFO L87 Difference]: Start difference. First operand 268 states and 314 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:27:56,861 INFO L93 Difference]: Finished difference Result 297 states and 355 transitions. [2022-03-18 02:27:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:27:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2022-03-18 02:27:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:27:56,863 INFO L225 Difference]: With dead ends: 297 [2022-03-18 02:27:56,863 INFO L226 Difference]: Without dead ends: 295 [2022-03-18 02:27:56,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:27:56,863 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:27:56,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 315 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:27:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-18 02:27:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 249. [2022-03-18 02:27:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 165 states have internal predecessors, (181), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 02:27:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-03-18 02:27:56,890 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 85 [2022-03-18 02:27:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:27:56,890 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-03-18 02:27:56,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:27:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-03-18 02:27:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 02:27:56,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:27:56,891 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:27:56,909 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 02:27:57,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:57,106 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:27:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:27:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 11 times [2022-03-18 02:27:57,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:27:57,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501805807] [2022-03-18 02:27:57,106 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:27:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2022-03-18 02:27:57,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:27:57,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963171527] [2022-03-18 02:27:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:27:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:27:57,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:27:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150960299] [2022-03-18 02:27:57,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:27:57,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:27:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:27:57,113 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 02:27:57,115 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 02:27:57,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:27:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:27:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:27:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:27:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-18 02:27:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:27:57,642 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:27:57,664 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:28:24,307 WARN L232 SmtUtils]: Spent 17.83s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 02:28:24,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:28:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963171527] [2022-03-18 02:28:24,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:28:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150960299] [2022-03-18 02:28:24,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150960299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:28:24,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:28:24,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 02:28:24,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:28:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501805807] [2022-03-18 02:28:24,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501805807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:28:24,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:28:24,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:28:24,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76650594] [2022-03-18 02:28:24,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:28:24,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:28:24,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:28:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=161, Unknown=2, NotChecked=0, Total=210 [2022-03-18 02:28:24,311 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:28:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:28:26,694 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2022-03-18 02:28:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:28:26,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2022-03-18 02:28:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:28:26,697 INFO L225 Difference]: With dead ends: 315 [2022-03-18 02:28:26,697 INFO L226 Difference]: Without dead ends: 309 [2022-03-18 02:28:26,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=67, Invalid=236, Unknown=3, NotChecked=0, Total=306 [2022-03-18 02:28:26,697 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:28:26,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 288 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:28:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-18 02:28:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2022-03-18 02:28:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 175 states have internal predecessors, (191), 63 states have call successors, (63), 35 states have call predecessors, (63), 34 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-18 02:28:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 313 transitions. [2022-03-18 02:28:26,728 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 313 transitions. Word has length 85 [2022-03-18 02:28:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:28:26,728 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 313 transitions. [2022-03-18 02:28:26,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 02:28:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 313 transitions. [2022-03-18 02:28:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:28:26,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:28:26,729 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:28:26,752 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 02:28:26,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 02:28:26,947 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:28:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:28:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2022-03-18 02:28:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1181941081] [2022-03-18 02:28:26,948 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:28:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 14 times [2022-03-18 02:28:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:28:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209505561] [2022-03-18 02:28:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:28:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:28:26,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:28:26,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132948148] [2022-03-18 02:28:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:28:26,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:28:26,972 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 02:28:26,973 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 02:28:27,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:28:27,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:28:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 02:28:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:28:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 02:28:27,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:28:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 02:28:28,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:28:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209505561] [2022-03-18 02:28:28,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:28:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132948148] [2022-03-18 02:28:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132948148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:28:28,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:28:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:28:28,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:28:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1181941081] [2022-03-18 02:28:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1181941081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:28:28,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:28:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:28:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181843268] [2022-03-18 02:28:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:28:28,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:28:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:28:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:28:28,081 INFO L87 Difference]: Start difference. First operand 265 states and 313 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:28:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:28:28,409 INFO L93 Difference]: Finished difference Result 291 states and 354 transitions. [2022-03-18 02:28:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:28:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2022-03-18 02:28:28,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:28:28,411 INFO L225 Difference]: With dead ends: 291 [2022-03-18 02:28:28,411 INFO L226 Difference]: Without dead ends: 285 [2022-03-18 02:28:28,411 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:28:28,411 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:28:28,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 354 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:28:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-18 02:28:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 269. [2022-03-18 02:28:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 178 states have internal predecessors, (193), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 02:28:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 319 transitions. [2022-03-18 02:28:28,444 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 319 transitions. Word has length 90 [2022-03-18 02:28:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:28:28,444 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 319 transitions. [2022-03-18 02:28:28,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 02:28:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 319 transitions. [2022-03-18 02:28:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:28:28,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:28:28,445 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:28:28,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:28:28,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-18 02:28:28,662 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:28:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:28:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 15 times [2022-03-18 02:28:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:28,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098265672] [2022-03-18 02:28:28,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:28:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 16 times [2022-03-18 02:28:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:28:28,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700564937] [2022-03-18 02:28:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:28:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:28:28,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:28:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580075488] [2022-03-18 02:28:28,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:28:28,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:28:28,671 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 02:28:28,682 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 02:28:28,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:28:28,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:28:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 02:28:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:28:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-18 02:28:29,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:28:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-18 02:28:29,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:28:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700564937] [2022-03-18 02:28:29,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:28:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580075488] [2022-03-18 02:28:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580075488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:28:29,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:28:29,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 02:28:29,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:28:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098265672] [2022-03-18 02:28:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098265672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:28:29,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:28:29,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:28:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167616999] [2022-03-18 02:28:29,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:28:29,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:28:29,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:28:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:28:29,620 INFO L87 Difference]: Start difference. First operand 269 states and 319 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 02:28:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:28:31,001 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2022-03-18 02:28:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:28:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2022-03-18 02:28:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:28:31,003 INFO L225 Difference]: With dead ends: 310 [2022-03-18 02:28:31,003 INFO L226 Difference]: Without dead ends: 304 [2022-03-18 02:28:31,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:28:31,004 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:28:31,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 02:28:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-18 02:28:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 284. [2022-03-18 02:28:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 188 states have internal predecessors, (204), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-18 02:28:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 336 transitions. [2022-03-18 02:28:31,045 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 336 transitions. Word has length 90 [2022-03-18 02:28:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:28:31,045 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 336 transitions. [2022-03-18 02:28:31,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 02:28:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 336 transitions. [2022-03-18 02:28:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 02:28:31,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:28:31,046 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:28:31,065 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 02:28:31,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:31,263 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:28:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:28:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 17 times [2022-03-18 02:28:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854732207] [2022-03-18 02:28:31,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:28:31,264 INFO L85 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 18 times [2022-03-18 02:28:31,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:28:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809446308] [2022-03-18 02:28:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:28:31,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:28:31,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:28:31,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263599321] [2022-03-18 02:28:31,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:28:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:31,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:28:31,272 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 02:28:31,273 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 02:28:31,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:28:31,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:28:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:28:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:28:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-03-18 02:28:35,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:28:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-18 02:28:36,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:28:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809446308] [2022-03-18 02:28:36,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:28:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263599321] [2022-03-18 02:28:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263599321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:28:36,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:28:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-18 02:28:36,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:28:36,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854732207] [2022-03-18 02:28:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854732207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:28:36,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:28:36,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:28:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479619616] [2022-03-18 02:28:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:28:36,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:28:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:28:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2022-03-18 02:28:36,337 INFO L87 Difference]: Start difference. First operand 284 states and 336 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:28:38,588 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 02:28:40,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:42,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:45,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:46,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:48,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:50,741 WARN L534 Checker$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 02:28:51,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:53,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:55,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:28:57,327 WARN L534 Checker$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 02:28:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:28:58,296 INFO L93 Difference]: Finished difference Result 341 states and 426 transitions. [2022-03-18 02:28:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:28:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 90 [2022-03-18 02:28:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:28:58,298 INFO L225 Difference]: With dead ends: 341 [2022-03-18 02:28:58,298 INFO L226 Difference]: Without dead ends: 331 [2022-03-18 02:28:58,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2022-03-18 02:28:58,298 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 25 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 17 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:28:58,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 407 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 388 Invalid, 7 Unknown, 0 Unchecked, 21.4s Time] [2022-03-18 02:28:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-18 02:28:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 317. [2022-03-18 02:28:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 201 states have (on average 1.1741293532338308) internal successors, (236), 208 states have internal predecessors, (236), 78 states have call successors, (78), 38 states have call predecessors, (78), 37 states have return successors, (74), 70 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-18 02:28:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 388 transitions. [2022-03-18 02:28:58,360 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 388 transitions. Word has length 90 [2022-03-18 02:28:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:28:58,361 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 388 transitions. [2022-03-18 02:28:58,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:28:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 388 transitions. [2022-03-18 02:28:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 02:28:58,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:28:58,362 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:28:58,380 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 02:28:58,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:58,575 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:28:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:28:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 7 times [2022-03-18 02:28:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:58,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215030864] [2022-03-18 02:28:58,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:28:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 8 times [2022-03-18 02:28:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:28:58,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660421676] [2022-03-18 02:28:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:28:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:28:58,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:28:58,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199222495] [2022-03-18 02:28:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:28:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:28:58,586 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 02:28:58,587 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 02:28:58,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:28:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:28:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:28:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:28:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:28:58,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:28:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:28:58,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:28:58,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660421676] [2022-03-18 02:28:58,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:28:58,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199222495] [2022-03-18 02:28:58,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199222495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:28:58,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:28:58,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:28:58,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:28:58,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215030864] [2022-03-18 02:28:58,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215030864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:28:58,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:28:58,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:28:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680710527] [2022-03-18 02:28:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:28:58,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:28:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:28:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:28:58,995 INFO L87 Difference]: Start difference. First operand 317 states and 388 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:28:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:28:59,145 INFO L93 Difference]: Finished difference Result 424 states and 505 transitions. [2022-03-18 02:28:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:28:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-03-18 02:28:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:28:59,149 INFO L225 Difference]: With dead ends: 424 [2022-03-18 02:28:59,149 INFO L226 Difference]: Without dead ends: 399 [2022-03-18 02:28:59,150 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:28:59,150 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 28 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:28:59,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:28:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-18 02:28:59,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 382. [2022-03-18 02:28:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 248 states have (on average 1.1411290322580645) internal successors, (283), 256 states have internal predecessors, (283), 85 states have call successors, (85), 50 states have call predecessors, (85), 48 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-18 02:28:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 448 transitions. [2022-03-18 02:28:59,206 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 448 transitions. Word has length 99 [2022-03-18 02:28:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:28:59,207 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 448 transitions. [2022-03-18 02:28:59,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:28:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 448 transitions. [2022-03-18 02:28:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:28:59,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:28:59,208 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:28:59,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 02:28:59,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 02:28:59,411 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:28:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:28:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 9 times [2022-03-18 02:28:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:28:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840654466] [2022-03-18 02:28:59,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:28:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 10 times [2022-03-18 02:28:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:28:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226758546] [2022-03-18 02:28:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:28:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:28:59,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:28:59,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749470601] [2022-03-18 02:28:59,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:28:59,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:28:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:28:59,419 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 02:28:59,422 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 02:28:59,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:28:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:28:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:28:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 02:29:00,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-18 02:29:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226758546] [2022-03-18 02:29:00,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:00,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749470601] [2022-03-18 02:29:00,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749470601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:00,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:00,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-18 02:29:00,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840654466] [2022-03-18 02:29:00,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840654466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:00,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:00,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:29:00,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492797023] [2022-03-18 02:29:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:00,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:29:00,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:29:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:29:00,442 INFO L87 Difference]: Start difference. First operand 382 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:01,002 INFO L93 Difference]: Finished difference Result 409 states and 487 transitions. [2022-03-18 02:29:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:29:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:29:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:01,005 INFO L225 Difference]: With dead ends: 409 [2022-03-18 02:29:01,005 INFO L226 Difference]: Without dead ends: 407 [2022-03-18 02:29:01,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:29:01,006 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:01,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 457 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:29:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-18 02:29:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 402. [2022-03-18 02:29:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 260 states have (on average 1.15) internal successors, (299), 268 states have internal predecessors, (299), 91 states have call successors, (91), 52 states have call predecessors, (91), 50 states have return successors, (86), 81 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-18 02:29:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 476 transitions. [2022-03-18 02:29:01,063 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 476 transitions. Word has length 104 [2022-03-18 02:29:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:01,063 INFO L478 AbstractCegarLoop]: Abstraction has 402 states and 476 transitions. [2022-03-18 02:29:01,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 476 transitions. [2022-03-18 02:29:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:01,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:01,065 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:01,085 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 02:29:01,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 02:29:01,279 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 19 times [2022-03-18 02:29:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138462633] [2022-03-18 02:29:01,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 20 times [2022-03-18 02:29:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495956565] [2022-03-18 02:29:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:01,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:01,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423417395] [2022-03-18 02:29:01,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:01,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:01,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:01,292 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 02:29:01,293 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 02:29:01,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:01,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:29:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:29:02,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:29:03,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495956565] [2022-03-18 02:29:03,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423417395] [2022-03-18 02:29:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423417395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:03,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 02:29:03,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138462633] [2022-03-18 02:29:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138462633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:03,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:29:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530794079] [2022-03-18 02:29:03,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:03,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:29:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:29:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:29:03,421 INFO L87 Difference]: Start difference. First operand 402 states and 476 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:29:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:03,799 INFO L93 Difference]: Finished difference Result 450 states and 537 transitions. [2022-03-18 02:29:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:29:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-18 02:29:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:03,808 INFO L225 Difference]: With dead ends: 450 [2022-03-18 02:29:03,808 INFO L226 Difference]: Without dead ends: 448 [2022-03-18 02:29:03,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:29:03,810 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:03,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 440 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:29:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-03-18 02:29:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 432. [2022-03-18 02:29:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1464285714285714) internal successors, (321), 288 states have internal predecessors, (321), 97 states have call successors, (97), 56 states have call predecessors, (97), 54 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2022-03-18 02:29:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 510 transitions. [2022-03-18 02:29:03,918 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 510 transitions. Word has length 104 [2022-03-18 02:29:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:03,918 INFO L478 AbstractCegarLoop]: Abstraction has 432 states and 510 transitions. [2022-03-18 02:29:03,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:29:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 510 transitions. [2022-03-18 02:29:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:03,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:03,943 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:03,963 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 02:29:04,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 02:29:04,144 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 21 times [2022-03-18 02:29:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:04,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478028672] [2022-03-18 02:29:04,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 22 times [2022-03-18 02:29:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:04,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464652002] [2022-03-18 02:29:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:04,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:04,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671257942] [2022-03-18 02:29:04,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:04,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:04,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:04,152 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 02:29:04,153 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 02:29:04,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:04,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 02:29:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 93 proven. 111 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:29:04,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 109 proven. 8 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-03-18 02:29:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464652002] [2022-03-18 02:29:05,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671257942] [2022-03-18 02:29:05,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671257942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:05,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:05,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 02:29:05,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:05,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478028672] [2022-03-18 02:29:05,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478028672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:05,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:05,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:29:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534468269] [2022-03-18 02:29:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:05,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:29:05,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:29:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:29:05,227 INFO L87 Difference]: Start difference. First operand 432 states and 510 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:29:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:05,916 INFO L93 Difference]: Finished difference Result 479 states and 566 transitions. [2022-03-18 02:29:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:29:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2022-03-18 02:29:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:05,919 INFO L225 Difference]: With dead ends: 479 [2022-03-18 02:29:05,919 INFO L226 Difference]: Without dead ends: 477 [2022-03-18 02:29:05,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:29:05,920 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:05,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 394 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:29:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-18 02:29:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 431. [2022-03-18 02:29:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 281 states have (on average 1.1459074733096086) internal successors, (322), 288 states have internal predecessors, (322), 94 states have call successors, (94), 57 states have call predecessors, (94), 55 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-18 02:29:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 505 transitions. [2022-03-18 02:29:06,005 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 505 transitions. Word has length 104 [2022-03-18 02:29:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:06,005 INFO L478 AbstractCegarLoop]: Abstraction has 431 states and 505 transitions. [2022-03-18 02:29:06,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 02:29:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 505 transitions. [2022-03-18 02:29:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:06,006 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:06,006 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:06,026 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 02:29:06,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 02:29:06,224 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 23 times [2022-03-18 02:29:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244921330] [2022-03-18 02:29:06,225 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 24 times [2022-03-18 02:29:06,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:06,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942282574] [2022-03-18 02:29:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:06,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:06,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:06,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650606999] [2022-03-18 02:29:06,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:06,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:06,231 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 02:29:06,238 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 02:29:06,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 02:29:06,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:29:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 107 proven. 40 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-18 02:29:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942282574] [2022-03-18 02:29:11,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650606999] [2022-03-18 02:29:11,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650606999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:29:11,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:29:11,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 02:29:11,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244921330] [2022-03-18 02:29:11,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244921330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:11,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:11,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:29:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318145606] [2022-03-18 02:29:11,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:11,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:29:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:29:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=404, Unknown=1, NotChecked=0, Total=506 [2022-03-18 02:29:11,745 INFO L87 Difference]: Start difference. First operand 431 states and 505 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:29:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:15,826 INFO L93 Difference]: Finished difference Result 523 states and 639 transitions. [2022-03-18 02:29:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:29:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 104 [2022-03-18 02:29:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:15,828 INFO L225 Difference]: With dead ends: 523 [2022-03-18 02:29:15,828 INFO L226 Difference]: Without dead ends: 517 [2022-03-18 02:29:15,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=141, Invalid=614, Unknown=1, NotChecked=0, Total=756 [2022-03-18 02:29:15,829 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 40 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:15,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 523 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 02:29:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-18 02:29:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 485. [2022-03-18 02:29:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 315 states have (on average 1.1555555555555554) internal successors, (364), 323 states have internal predecessors, (364), 109 states have call successors, (109), 62 states have call predecessors, (109), 60 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-03-18 02:29:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 577 transitions. [2022-03-18 02:29:15,937 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 577 transitions. Word has length 104 [2022-03-18 02:29:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:15,937 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 577 transitions. [2022-03-18 02:29:15,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 02:29:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 577 transitions. [2022-03-18 02:29:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:15,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:15,938 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:15,944 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 02:29:16,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:16,140 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 25 times [2022-03-18 02:29:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:16,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867573100] [2022-03-18 02:29:16,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 26 times [2022-03-18 02:29:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:16,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687507173] [2022-03-18 02:29:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:16,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:16,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721650991] [2022-03-18 02:29:16,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:16,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:16,153 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 02:29:16,154 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 02:29:16,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 02:29:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-18 02:29:17,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-03-18 02:29:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:17,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687507173] [2022-03-18 02:29:17,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:17,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721650991] [2022-03-18 02:29:17,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721650991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:17,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:17,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 02:29:17,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:17,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867573100] [2022-03-18 02:29:17,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867573100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:17,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:17,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:29:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2806651] [2022-03-18 02:29:17,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:17,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:29:17,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:29:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:29:17,778 INFO L87 Difference]: Start difference. First operand 485 states and 577 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:18,437 INFO L93 Difference]: Finished difference Result 514 states and 618 transitions. [2022-03-18 02:29:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:29:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:29:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:18,440 INFO L225 Difference]: With dead ends: 514 [2022-03-18 02:29:18,440 INFO L226 Difference]: Without dead ends: 512 [2022-03-18 02:29:18,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:29:18,441 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:18,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 412 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:29:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-03-18 02:29:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 485. [2022-03-18 02:29:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 315 states have (on average 1.1555555555555554) internal successors, (364), 323 states have internal predecessors, (364), 109 states have call successors, (109), 62 states have call predecessors, (109), 60 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-03-18 02:29:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 577 transitions. [2022-03-18 02:29:18,551 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 577 transitions. Word has length 104 [2022-03-18 02:29:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:18,551 INFO L478 AbstractCegarLoop]: Abstraction has 485 states and 577 transitions. [2022-03-18 02:29:18,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 577 transitions. [2022-03-18 02:29:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:18,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:18,552 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:18,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:29:18,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:18,767 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 27 times [2022-03-18 02:29:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:18,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16267766] [2022-03-18 02:29:18,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 28 times [2022-03-18 02:29:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:18,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108736941] [2022-03-18 02:29:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:18,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:18,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760696129] [2022-03-18 02:29:18,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:18,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:18,777 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 02:29:18,777 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 02:29:18,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:18,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:29:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 74 proven. 100 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 02:29:21,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 113 proven. 32 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-18 02:29:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108736941] [2022-03-18 02:29:22,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:22,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760696129] [2022-03-18 02:29:22,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760696129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:22,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:22,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-18 02:29:22,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16267766] [2022-03-18 02:29:22,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16267766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:22,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:29:22,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350998617] [2022-03-18 02:29:22,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:22,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:29:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:29:22,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:29:22,048 INFO L87 Difference]: Start difference. First operand 485 states and 577 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:24,733 INFO L93 Difference]: Finished difference Result 516 states and 620 transitions. [2022-03-18 02:29:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:29:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2022-03-18 02:29:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:24,736 INFO L225 Difference]: With dead ends: 516 [2022-03-18 02:29:24,736 INFO L226 Difference]: Without dead ends: 500 [2022-03-18 02:29:24,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:29:24,737 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:24,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 433 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 02:29:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-03-18 02:29:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 484. [2022-03-18 02:29:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 315 states have (on average 1.1587301587301588) internal successors, (365), 323 states have internal predecessors, (365), 108 states have call successors, (108), 61 states have call predecessors, (108), 60 states have return successors, (104), 99 states have call predecessors, (104), 104 states have call successors, (104) [2022-03-18 02:29:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 577 transitions. [2022-03-18 02:29:24,894 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 577 transitions. Word has length 104 [2022-03-18 02:29:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:24,894 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 577 transitions. [2022-03-18 02:29:24,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 02:29:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 577 transitions. [2022-03-18 02:29:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:29:24,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:24,895 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:24,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:29:25,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-18 02:29:25,113 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 29 times [2022-03-18 02:29:25,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:25,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748269383] [2022-03-18 02:29:25,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -633359412, now seen corresponding path program 30 times [2022-03-18 02:29:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157452106] [2022-03-18 02:29:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:25,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:25,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543023654] [2022-03-18 02:29:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:25,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:25,130 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 02:29:25,131 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 02:29:25,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:29:25,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 02:29:25,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-18 02:29:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-03-18 02:29:32,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157452106] [2022-03-18 02:29:32,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543023654] [2022-03-18 02:29:32,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543023654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:32,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-18 02:29:32,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:32,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748269383] [2022-03-18 02:29:32,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748269383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:32,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:32,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:29:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448349831] [2022-03-18 02:29:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:32,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:29:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:29:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2022-03-18 02:29:32,843 INFO L87 Difference]: Start difference. First operand 484 states and 577 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 02:29:35,220 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 02:29:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:36,129 INFO L93 Difference]: Finished difference Result 563 states and 688 transitions. [2022-03-18 02:29:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:29:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-03-18 02:29:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:36,132 INFO L225 Difference]: With dead ends: 563 [2022-03-18 02:29:36,132 INFO L226 Difference]: Without dead ends: 561 [2022-03-18 02:29:36,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=73, Invalid=345, Unknown=2, NotChecked=0, Total=420 [2022-03-18 02:29:36,133 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:36,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 301 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 386 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 02:29:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-18 02:29:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 509. [2022-03-18 02:29:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 330 states have (on average 1.1545454545454545) internal successors, (381), 341 states have internal predecessors, (381), 115 states have call successors, (115), 64 states have call predecessors, (115), 63 states have return successors, (111), 103 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-18 02:29:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 607 transitions. [2022-03-18 02:29:36,263 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 607 transitions. Word has length 104 [2022-03-18 02:29:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:36,263 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 607 transitions. [2022-03-18 02:29:36,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 02:29:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 607 transitions. [2022-03-18 02:29:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:29:36,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:36,264 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:36,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 02:29:36,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:36,470 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 31 times [2022-03-18 02:29:36,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:36,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1990470006] [2022-03-18 02:29:36,471 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1283404789, now seen corresponding path program 32 times [2022-03-18 02:29:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153909354] [2022-03-18 02:29:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:36,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905946349] [2022-03-18 02:29:36,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:36,477 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 02:29:36,478 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 02:29:36,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:36,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:29:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 02:29:37,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 02:29:37,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153909354] [2022-03-18 02:29:37,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905946349] [2022-03-18 02:29:37,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905946349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:37,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:37,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 02:29:37,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1990470006] [2022-03-18 02:29:37,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1990470006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:37,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:37,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:29:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787106040] [2022-03-18 02:29:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:37,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:29:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:29:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:29:37,293 INFO L87 Difference]: Start difference. First operand 509 states and 607 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:29:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:37,589 INFO L93 Difference]: Finished difference Result 535 states and 648 transitions. [2022-03-18 02:29:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:29:37,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-18 02:29:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:37,611 INFO L225 Difference]: With dead ends: 535 [2022-03-18 02:29:37,611 INFO L226 Difference]: Without dead ends: 529 [2022-03-18 02:29:37,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:29:37,613 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:37,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 424 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:29:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-18 02:29:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-03-18 02:29:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 341 states have (on average 1.1583577712609971) internal successors, (395), 352 states have internal predecessors, (395), 121 states have call successors, (121), 65 states have call predecessors, (121), 64 states have return successors, (117), 109 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-18 02:29:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 633 transitions. [2022-03-18 02:29:37,739 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 633 transitions. Word has length 109 [2022-03-18 02:29:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:37,739 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 633 transitions. [2022-03-18 02:29:37,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:29:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 633 transitions. [2022-03-18 02:29:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:29:37,740 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:37,740 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:37,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 02:29:37,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:37,957 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 33 times [2022-03-18 02:29:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002333365] [2022-03-18 02:29:37,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1677771575, now seen corresponding path program 34 times [2022-03-18 02:29:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586459702] [2022-03-18 02:29:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:37,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020198666] [2022-03-18 02:29:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:37,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:37,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:37,967 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 02:29:37,968 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 02:29:38,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 02:29:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 30 proven. 99 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-18 02:29:38,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 34 proven. 95 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-03-18 02:29:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586459702] [2022-03-18 02:29:41,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020198666] [2022-03-18 02:29:41,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020198666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:41,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:41,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-18 02:29:41,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002333365] [2022-03-18 02:29:41,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002333365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:41,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:41,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:29:41,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19777145] [2022-03-18 02:29:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:41,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:29:41,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:29:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:29:41,299 INFO L87 Difference]: Start difference. First operand 527 states and 633 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:29:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:42,327 INFO L93 Difference]: Finished difference Result 563 states and 683 transitions. [2022-03-18 02:29:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:29:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2022-03-18 02:29:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:42,330 INFO L225 Difference]: With dead ends: 563 [2022-03-18 02:29:42,330 INFO L226 Difference]: Without dead ends: 557 [2022-03-18 02:29:42,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:29:42,330 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:42,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 424 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:29:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-03-18 02:29:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 531. [2022-03-18 02:29:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 346 states have (on average 1.1589595375722543) internal successors, (401), 355 states have internal predecessors, (401), 119 states have call successors, (119), 66 states have call predecessors, (119), 65 states have return successors, (115), 109 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:29:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 635 transitions. [2022-03-18 02:29:42,456 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 635 transitions. Word has length 109 [2022-03-18 02:29:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:42,457 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 635 transitions. [2022-03-18 02:29:42,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 02:29:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 635 transitions. [2022-03-18 02:29:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:29:42,459 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:42,459 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:42,476 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 02:29:42,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 02:29:42,675 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 35 times [2022-03-18 02:29:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790823168] [2022-03-18 02:29:42,676 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash 103380621, now seen corresponding path program 36 times [2022-03-18 02:29:42,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367114207] [2022-03-18 02:29:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:42,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:42,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901815668] [2022-03-18 02:29:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:42,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:42,685 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 02:29:42,686 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 02:29:43,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:29:43,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:43,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:29:43,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-18 02:29:43,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 121 proven. 5 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-03-18 02:29:44,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367114207] [2022-03-18 02:29:44,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901815668] [2022-03-18 02:29:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901815668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:44,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-18 02:29:44,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790823168] [2022-03-18 02:29:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790823168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:44,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:44,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:29:44,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292791284] [2022-03-18 02:29:44,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:44,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:29:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:29:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 02:29:44,017 INFO L87 Difference]: Start difference. First operand 531 states and 635 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:29:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:44,352 INFO L93 Difference]: Finished difference Result 541 states and 643 transitions. [2022-03-18 02:29:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:29:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 109 [2022-03-18 02:29:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:44,355 INFO L225 Difference]: With dead ends: 541 [2022-03-18 02:29:44,355 INFO L226 Difference]: Without dead ends: 520 [2022-03-18 02:29:44,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:29:44,355 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:44,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 154 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-18 02:29:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 443. [2022-03-18 02:29:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 296 states have (on average 1.125) internal successors, (333), 303 states have internal predecessors, (333), 88 states have call successors, (88), 59 states have call predecessors, (88), 58 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-18 02:29:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 506 transitions. [2022-03-18 02:29:44,477 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 506 transitions. Word has length 109 [2022-03-18 02:29:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:44,477 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 506 transitions. [2022-03-18 02:29:44,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 02:29:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 506 transitions. [2022-03-18 02:29:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 02:29:44,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:44,479 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:44,485 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 02:29:44,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 02:29:44,685 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 9 times [2022-03-18 02:29:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:44,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111857299] [2022-03-18 02:29:44,686 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1511605586, now seen corresponding path program 10 times [2022-03-18 02:29:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:44,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566595047] [2022-03-18 02:29:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:44,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:44,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280444532] [2022-03-18 02:29:44,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:44,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:44,693 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 02:29:44,694 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 02:29:44,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:29:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 440 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 02:29:44,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:29:44,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:44,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566595047] [2022-03-18 02:29:44,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:44,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280444532] [2022-03-18 02:29:44,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280444532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:44,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:44,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 02:29:44,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:44,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111857299] [2022-03-18 02:29:44,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111857299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:44,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:44,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:29:44,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050884862] [2022-03-18 02:29:44,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:44,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:29:44,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:29:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:29:44,974 INFO L87 Difference]: Start difference. First operand 443 states and 506 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:29:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:45,190 INFO L93 Difference]: Finished difference Result 552 states and 638 transitions. [2022-03-18 02:29:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:29:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-03-18 02:29:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:45,192 INFO L225 Difference]: With dead ends: 552 [2022-03-18 02:29:45,192 INFO L226 Difference]: Without dead ends: 543 [2022-03-18 02:29:45,194 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:29:45,197 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 29 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:45,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 142 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:29:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-18 02:29:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2022-03-18 02:29:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 364 states have (on average 1.1181318681318682) internal successors, (407), 371 states have internal predecessors, (407), 106 states have call successors, (106), 71 states have call predecessors, (106), 70 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-18 02:29:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 616 transitions. [2022-03-18 02:29:45,402 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 616 transitions. Word has length 118 [2022-03-18 02:29:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:45,402 INFO L478 AbstractCegarLoop]: Abstraction has 541 states and 616 transitions. [2022-03-18 02:29:45,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 02:29:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 616 transitions. [2022-03-18 02:29:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 02:29:45,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:45,404 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:45,441 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 02:29:45,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-18 02:29:45,620 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 11 times [2022-03-18 02:29:45,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407951120] [2022-03-18 02:29:45,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1126498815, now seen corresponding path program 12 times [2022-03-18 02:29:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:45,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622373453] [2022-03-18 02:29:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:45,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:45,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335023513] [2022-03-18 02:29:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:45,628 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 02:29:45,629 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 02:29:45,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 02:29:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:29:45,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 657 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:29:45,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-18 02:29:46,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622373453] [2022-03-18 02:29:46,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335023513] [2022-03-18 02:29:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335023513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 02:29:46,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407951120] [2022-03-18 02:29:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407951120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:46,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:29:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079477058] [2022-03-18 02:29:46,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:46,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:29:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:29:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:29:46,152 INFO L87 Difference]: Start difference. First operand 541 states and 616 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:29:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:46,445 INFO L93 Difference]: Finished difference Result 669 states and 782 transitions. [2022-03-18 02:29:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:29:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2022-03-18 02:29:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:46,448 INFO L225 Difference]: With dead ends: 669 [2022-03-18 02:29:46,448 INFO L226 Difference]: Without dead ends: 660 [2022-03-18 02:29:46,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:29:46,449 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:46,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-03-18 02:29:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 658. [2022-03-18 02:29:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 440 states have (on average 1.1181818181818182) internal successors, (492), 448 states have internal predecessors, (492), 135 states have call successors, (135), 83 states have call predecessors, (135), 82 states have return successors, (132), 126 states have call predecessors, (132), 132 states have call successors, (132) [2022-03-18 02:29:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 759 transitions. [2022-03-18 02:29:46,626 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 759 transitions. Word has length 137 [2022-03-18 02:29:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:46,626 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 759 transitions. [2022-03-18 02:29:46,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 02:29:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 759 transitions. [2022-03-18 02:29:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-18 02:29:46,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:46,628 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:46,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 02:29:46,862 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:46,862 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 13 times [2022-03-18 02:29:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12105209] [2022-03-18 02:29:46,863 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1647300850, now seen corresponding path program 14 times [2022-03-18 02:29:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106396019] [2022-03-18 02:29:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:46,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630059701] [2022-03-18 02:29:46,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:46,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:46,870 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 02:29:46,871 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 02:29:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:29:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 917 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:29:47,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 42 proven. 161 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-18 02:29:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:47,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106396019] [2022-03-18 02:29:47,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:47,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630059701] [2022-03-18 02:29:47,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630059701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:47,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:47,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-18 02:29:47,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:47,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12105209] [2022-03-18 02:29:47,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12105209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:47,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:47,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:29:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568676918] [2022-03-18 02:29:47,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:47,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:29:47,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:47,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:29:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:29:47,516 INFO L87 Difference]: Start difference. First operand 658 states and 759 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-18 02:29:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:47,811 INFO L93 Difference]: Finished difference Result 792 states and 932 transitions. [2022-03-18 02:29:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:29:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) Word has length 156 [2022-03-18 02:29:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:47,814 INFO L225 Difference]: With dead ends: 792 [2022-03-18 02:29:47,814 INFO L226 Difference]: Without dead ends: 783 [2022-03-18 02:29:47,815 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-18 02:29:47,815 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:47,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 196 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:47,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-03-18 02:29:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 781. [2022-03-18 02:29:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 519 states have (on average 1.117533718689788) internal successors, (580), 529 states have internal predecessors, (580), 166 states have call successors, (166), 96 states have call predecessors, (166), 95 states have return successors, (163), 155 states have call predecessors, (163), 163 states have call successors, (163) [2022-03-18 02:29:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 909 transitions. [2022-03-18 02:29:48,025 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 909 transitions. Word has length 156 [2022-03-18 02:29:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:48,025 INFO L478 AbstractCegarLoop]: Abstraction has 781 states and 909 transitions. [2022-03-18 02:29:48,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (26), 10 states have call predecessors, (26), 8 states have return successors, (24), 8 states have call predecessors, (24), 9 states have call successors, (24) [2022-03-18 02:29:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 909 transitions. [2022-03-18 02:29:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 02:29:48,027 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:48,027 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:48,059 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 02:29:48,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 02:29:48,260 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 15 times [2022-03-18 02:29:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714187145] [2022-03-18 02:29:48,261 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash -980382111, now seen corresponding path program 16 times [2022-03-18 02:29:48,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523670360] [2022-03-18 02:29:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:48,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:48,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861632675] [2022-03-18 02:29:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:48,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:48,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:48,270 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 02:29:48,271 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 02:29:48,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:29:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 1220 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-18 02:29:48,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 48 proven. 212 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-18 02:29:48,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523670360] [2022-03-18 02:29:48,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861632675] [2022-03-18 02:29:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861632675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:48,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:48,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 02:29:48,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714187145] [2022-03-18 02:29:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714187145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:48,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:48,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:29:48,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221092787] [2022-03-18 02:29:48,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:48,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:29:48,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:29:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:29:48,708 INFO L87 Difference]: Start difference. First operand 781 states and 909 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:29:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:49,065 INFO L93 Difference]: Finished difference Result 915 states and 1082 transitions. [2022-03-18 02:29:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:29:49,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 175 [2022-03-18 02:29:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:49,069 INFO L225 Difference]: With dead ends: 915 [2022-03-18 02:29:49,069 INFO L226 Difference]: Without dead ends: 906 [2022-03-18 02:29:49,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:29:49,070 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 37 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:49,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 178 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-03-18 02:29:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2022-03-18 02:29:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 598 states have (on average 1.117056856187291) internal successors, (668), 610 states have internal predecessors, (668), 197 states have call successors, (197), 109 states have call predecessors, (197), 108 states have return successors, (194), 184 states have call predecessors, (194), 194 states have call successors, (194) [2022-03-18 02:29:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1059 transitions. [2022-03-18 02:29:49,340 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1059 transitions. Word has length 175 [2022-03-18 02:29:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:49,340 INFO L478 AbstractCegarLoop]: Abstraction has 904 states and 1059 transitions. [2022-03-18 02:29:49,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (29), 11 states have call predecessors, (29), 9 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2022-03-18 02:29:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1059 transitions. [2022-03-18 02:29:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-18 02:29:49,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:49,342 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:49,363 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 02:29:49,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 02:29:49,555 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 17 times [2022-03-18 02:29:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528643947] [2022-03-18 02:29:49,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -794778478, now seen corresponding path program 18 times [2022-03-18 02:29:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827722597] [2022-03-18 02:29:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:49,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:49,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139503364] [2022-03-18 02:29:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:49,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:49,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:49,564 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 02:29:49,565 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 02:29:49,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 02:29:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:29:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 1566 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 02:29:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 54 proven. 270 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-18 02:29:50,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827722597] [2022-03-18 02:29:50,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139503364] [2022-03-18 02:29:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139503364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:50,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-18 02:29:50,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528643947] [2022-03-18 02:29:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528643947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:50,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:29:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867740918] [2022-03-18 02:29:50,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:50,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:29:50,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:29:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:29:50,125 INFO L87 Difference]: Start difference. First operand 904 states and 1059 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-18 02:29:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:50,549 INFO L93 Difference]: Finished difference Result 1038 states and 1232 transitions. [2022-03-18 02:29:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 02:29:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) Word has length 194 [2022-03-18 02:29:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:50,579 INFO L225 Difference]: With dead ends: 1038 [2022-03-18 02:29:50,580 INFO L226 Difference]: Without dead ends: 1029 [2022-03-18 02:29:50,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 02:29:50,581 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:50,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 200 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-03-18 02:29:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1027. [2022-03-18 02:29:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 677 states have (on average 1.1166912850812407) internal successors, (756), 691 states have internal predecessors, (756), 228 states have call successors, (228), 122 states have call predecessors, (228), 121 states have return successors, (225), 213 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:29:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1209 transitions. [2022-03-18 02:29:50,890 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1209 transitions. Word has length 194 [2022-03-18 02:29:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:50,890 INFO L478 AbstractCegarLoop]: Abstraction has 1027 states and 1209 transitions. [2022-03-18 02:29:50,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (32), 12 states have call predecessors, (32), 10 states have return successors, (30), 10 states have call predecessors, (30), 11 states have call successors, (30) [2022-03-18 02:29:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1209 transitions. [2022-03-18 02:29:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 02:29:50,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:50,893 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:50,901 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 02:29:51,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:51,100 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 19 times [2022-03-18 02:29:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:51,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1087422346] [2022-03-18 02:29:51,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1980311871, now seen corresponding path program 20 times [2022-03-18 02:29:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:51,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235999404] [2022-03-18 02:29:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:51,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:51,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636911652] [2022-03-18 02:29:51,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:51,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:51,110 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 02:29:51,136 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 02:29:51,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:51,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 02:29:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 1955 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 02:29:51,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 60 proven. 335 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-18 02:29:51,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235999404] [2022-03-18 02:29:51,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636911652] [2022-03-18 02:29:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636911652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:51,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:51,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 02:29:51,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:51,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1087422346] [2022-03-18 02:29:51,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1087422346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:51,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:51,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:29:51,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207337355] [2022-03-18 02:29:51,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:51,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:29:51,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:29:51,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:29:51,631 INFO L87 Difference]: Start difference. First operand 1027 states and 1209 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:29:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:52,100 INFO L93 Difference]: Finished difference Result 1161 states and 1382 transitions. [2022-03-18 02:29:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:29:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 213 [2022-03-18 02:29:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:52,104 INFO L225 Difference]: With dead ends: 1161 [2022-03-18 02:29:52,104 INFO L226 Difference]: Without dead ends: 1152 [2022-03-18 02:29:52,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:29:52,105 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:52,106 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 222 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-03-18 02:29:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2022-03-18 02:29:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 756 states have (on average 1.1164021164021165) internal successors, (844), 772 states have internal predecessors, (844), 259 states have call successors, (259), 135 states have call predecessors, (259), 134 states have return successors, (256), 242 states have call predecessors, (256), 256 states have call successors, (256) [2022-03-18 02:29:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1359 transitions. [2022-03-18 02:29:52,463 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1359 transitions. Word has length 213 [2022-03-18 02:29:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:52,464 INFO L478 AbstractCegarLoop]: Abstraction has 1150 states and 1359 transitions. [2022-03-18 02:29:52,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (35), 13 states have call predecessors, (35), 11 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-03-18 02:29:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1359 transitions. [2022-03-18 02:29:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-03-18 02:29:52,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:52,467 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 33, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:52,487 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 02:29:52,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-18 02:29:52,684 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 21 times [2022-03-18 02:29:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067757734] [2022-03-18 02:29:52,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1467334706, now seen corresponding path program 22 times [2022-03-18 02:29:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:52,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882451737] [2022-03-18 02:29:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:52,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:52,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771862076] [2022-03-18 02:29:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:52,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:52,708 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 02:29:52,715 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 02:29:52,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 02:29:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 2387 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-18 02:29:53,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 66 proven. 407 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-18 02:29:53,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882451737] [2022-03-18 02:29:53,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771862076] [2022-03-18 02:29:53,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771862076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:53,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:53,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-18 02:29:53,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:53,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067757734] [2022-03-18 02:29:53,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067757734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:53,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:53,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:29:53,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277400340] [2022-03-18 02:29:53,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:53,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:29:53,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:29:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:29:53,428 INFO L87 Difference]: Start difference. First operand 1150 states and 1359 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-18 02:29:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:53,968 INFO L93 Difference]: Finished difference Result 1284 states and 1532 transitions. [2022-03-18 02:29:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:29:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 232 [2022-03-18 02:29:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:53,988 INFO L225 Difference]: With dead ends: 1284 [2022-03-18 02:29:53,988 INFO L226 Difference]: Without dead ends: 1275 [2022-03-18 02:29:53,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 02:29:53,989 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 42 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:53,990 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 224 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-18 02:29:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-03-18 02:29:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 835 states have (on average 1.1161676646706586) internal successors, (932), 853 states have internal predecessors, (932), 290 states have call successors, (290), 148 states have call predecessors, (290), 147 states have return successors, (287), 271 states have call predecessors, (287), 287 states have call successors, (287) [2022-03-18 02:29:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1509 transitions. [2022-03-18 02:29:54,356 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1509 transitions. Word has length 232 [2022-03-18 02:29:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:54,356 INFO L478 AbstractCegarLoop]: Abstraction has 1273 states and 1509 transitions. [2022-03-18 02:29:54,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (38), 14 states have call predecessors, (38), 12 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2022-03-18 02:29:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1509 transitions. [2022-03-18 02:29:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-18 02:29:54,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:54,359 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:54,377 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 02:29:54,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:54,577 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 23 times [2022-03-18 02:29:54,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465742920] [2022-03-18 02:29:54,578 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:54,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2009323297, now seen corresponding path program 24 times [2022-03-18 02:29:54,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:54,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677628317] [2022-03-18 02:29:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:54,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:54,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597000384] [2022-03-18 02:29:54,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:29:54,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:54,589 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 02:29:54,590 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 02:29:54,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 02:29:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 02:29:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 2862 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 02:29:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 72 proven. 486 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-18 02:29:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677628317] [2022-03-18 02:29:55,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597000384] [2022-03-18 02:29:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597000384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:55,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 02:29:55,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:55,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465742920] [2022-03-18 02:29:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465742920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:55,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:29:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997809581] [2022-03-18 02:29:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:55,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:29:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:29:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:29:55,613 INFO L87 Difference]: Start difference. First operand 1273 states and 1509 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-18 02:29:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:56,248 INFO L93 Difference]: Finished difference Result 1407 states and 1682 transitions. [2022-03-18 02:29:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 02:29:56,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) Word has length 251 [2022-03-18 02:29:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:56,253 INFO L225 Difference]: With dead ends: 1407 [2022-03-18 02:29:56,253 INFO L226 Difference]: Without dead ends: 1398 [2022-03-18 02:29:56,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:29:56,255 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 52 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:56,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 236 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:29:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-03-18 02:29:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1396. [2022-03-18 02:29:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 914 states have (on average 1.1159737417943107) internal successors, (1020), 934 states have internal predecessors, (1020), 321 states have call successors, (321), 161 states have call predecessors, (321), 160 states have return successors, (318), 300 states have call predecessors, (318), 318 states have call successors, (318) [2022-03-18 02:29:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1659 transitions. [2022-03-18 02:29:56,639 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1659 transitions. Word has length 251 [2022-03-18 02:29:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:56,640 INFO L478 AbstractCegarLoop]: Abstraction has 1396 states and 1659 transitions. [2022-03-18 02:29:56,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 13 states have call predecessors, (39), 14 states have call successors, (39) [2022-03-18 02:29:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1659 transitions. [2022-03-18 02:29:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-03-18 02:29:56,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:56,643 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 39, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:56,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 02:29:56,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:56,849 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 25 times [2022-03-18 02:29:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515381906] [2022-03-18 02:29:56,850 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -784784430, now seen corresponding path program 26 times [2022-03-18 02:29:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302875491] [2022-03-18 02:29:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:56,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:56,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031032669] [2022-03-18 02:29:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:29:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:56,878 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 02:29:56,879 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 02:29:56,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:29:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:56,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 02:29:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 3380 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-18 02:29:57,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:29:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 78 proven. 572 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-18 02:29:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:29:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302875491] [2022-03-18 02:29:57,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:29:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031032669] [2022-03-18 02:29:57,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031032669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:29:57,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:29:57,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-18 02:29:57,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:29:57,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515381906] [2022-03-18 02:29:57,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515381906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:29:57,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:29:57,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:29:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560450098] [2022-03-18 02:29:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:29:57,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:29:57,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:29:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:29:57,749 INFO L87 Difference]: Start difference. First operand 1396 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-18 02:29:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:29:58,395 INFO L93 Difference]: Finished difference Result 1530 states and 1832 transitions. [2022-03-18 02:29:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 02:29:58,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) Word has length 270 [2022-03-18 02:29:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:29:58,400 INFO L225 Difference]: With dead ends: 1530 [2022-03-18 02:29:58,400 INFO L226 Difference]: Without dead ends: 1521 [2022-03-18 02:29:58,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 02:29:58,402 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:29:58,402 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 258 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:29:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-03-18 02:29:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2022-03-18 02:29:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 993 states have (on average 1.1158106747230614) internal successors, (1108), 1015 states have internal predecessors, (1108), 352 states have call successors, (352), 174 states have call predecessors, (352), 173 states have return successors, (349), 329 states have call predecessors, (349), 349 states have call successors, (349) [2022-03-18 02:29:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1809 transitions. [2022-03-18 02:29:58,826 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1809 transitions. Word has length 270 [2022-03-18 02:29:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:29:58,827 INFO L478 AbstractCegarLoop]: Abstraction has 1519 states and 1809 transitions. [2022-03-18 02:29:58,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (44), 16 states have call predecessors, (44), 14 states have return successors, (42), 14 states have call predecessors, (42), 15 states have call successors, (42) [2022-03-18 02:29:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1809 transitions. [2022-03-18 02:29:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-18 02:29:58,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:29:58,830 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 42, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:29:58,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 02:29:59,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-18 02:29:59,064 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:29:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:29:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 27 times [2022-03-18 02:29:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:29:59,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226278695] [2022-03-18 02:29:59,065 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:29:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 70094721, now seen corresponding path program 28 times [2022-03-18 02:29:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:29:59,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194426006] [2022-03-18 02:29:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:29:59,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:29:59,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:29:59,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517809506] [2022-03-18 02:29:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:29:59,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:29:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:29:59,075 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:29:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 02:29:59,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:29:59,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:29:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 02:29:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:29:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 3941 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:29:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 84 proven. 665 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-18 02:30:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:00,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194426006] [2022-03-18 02:30:00,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:00,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517809506] [2022-03-18 02:30:00,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517809506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:00,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:00,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 02:30:00,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:00,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226278695] [2022-03-18 02:30:00,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226278695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:00,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:00,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:30:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095840288] [2022-03-18 02:30:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:00,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:30:00,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:30:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:30:00,305 INFO L87 Difference]: Start difference. First operand 1519 states and 1809 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-18 02:30:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:01,044 INFO L93 Difference]: Finished difference Result 1653 states and 1982 transitions. [2022-03-18 02:30:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 02:30:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) Word has length 289 [2022-03-18 02:30:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:01,050 INFO L225 Difference]: With dead ends: 1653 [2022-03-18 02:30:01,050 INFO L226 Difference]: Without dead ends: 1644 [2022-03-18 02:30:01,051 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 02:30:01,052 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 97 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:01,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 250 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-03-18 02:30:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2022-03-18 02:30:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1072 states have (on average 1.1156716417910448) internal successors, (1196), 1096 states have internal predecessors, (1196), 383 states have call successors, (383), 187 states have call predecessors, (383), 186 states have return successors, (380), 358 states have call predecessors, (380), 380 states have call successors, (380) [2022-03-18 02:30:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1959 transitions. [2022-03-18 02:30:01,557 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1959 transitions. Word has length 289 [2022-03-18 02:30:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:01,557 INFO L478 AbstractCegarLoop]: Abstraction has 1642 states and 1959 transitions. [2022-03-18 02:30:01,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (47), 17 states have call predecessors, (47), 15 states have return successors, (45), 15 states have call predecessors, (45), 16 states have call successors, (45) [2022-03-18 02:30:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1959 transitions. [2022-03-18 02:30:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-03-18 02:30:01,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:01,561 INFO L500 BasicCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:01,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:01,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-18 02:30:01,779 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 29 times [2022-03-18 02:30:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:01,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [568656741] [2022-03-18 02:30:01,779 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash -520827022, now seen corresponding path program 30 times [2022-03-18 02:30:01,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816187410] [2022-03-18 02:30:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:01,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:01,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151183021] [2022-03-18 02:30:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:30:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:01,810 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:01,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 02:30:02,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2022-03-18 02:30:02,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:02,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:30:02,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 4545 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:30:02,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4819 backedges. 90 proven. 765 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-18 02:30:03,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816187410] [2022-03-18 02:30:03,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151183021] [2022-03-18 02:30:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151183021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:03,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-18 02:30:03,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [568656741] [2022-03-18 02:30:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [568656741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:03,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 02:30:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95496505] [2022-03-18 02:30:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:03,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 02:30:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 02:30:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:30:03,217 INFO L87 Difference]: Start difference. First operand 1642 states and 1959 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-18 02:30:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:04,016 INFO L93 Difference]: Finished difference Result 1776 states and 2132 transitions. [2022-03-18 02:30:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 02:30:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) Word has length 308 [2022-03-18 02:30:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:04,023 INFO L225 Difference]: With dead ends: 1776 [2022-03-18 02:30:04,023 INFO L226 Difference]: Without dead ends: 1767 [2022-03-18 02:30:04,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 02:30:04,024 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 55 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:04,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 302 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2022-03-18 02:30:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1765. [2022-03-18 02:30:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1151 states have (on average 1.1155516941789747) internal successors, (1284), 1177 states have internal predecessors, (1284), 414 states have call successors, (414), 200 states have call predecessors, (414), 199 states have return successors, (411), 387 states have call predecessors, (411), 411 states have call successors, (411) [2022-03-18 02:30:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2109 transitions. [2022-03-18 02:30:04,524 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2109 transitions. Word has length 308 [2022-03-18 02:30:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:04,524 INFO L478 AbstractCegarLoop]: Abstraction has 1765 states and 2109 transitions. [2022-03-18 02:30:04,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (50), 18 states have call predecessors, (50), 16 states have return successors, (48), 16 states have call predecessors, (48), 17 states have call successors, (48) [2022-03-18 02:30:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2109 transitions. [2022-03-18 02:30:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-03-18 02:30:04,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:04,528 INFO L500 BasicCegarLoop]: trace histogram [49, 48, 48, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:04,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 02:30:04,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-18 02:30:04,742 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 31 times [2022-03-18 02:30:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:04,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [645936611] [2022-03-18 02:30:04,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 199884769, now seen corresponding path program 32 times [2022-03-18 02:30:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:04,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257187818] [2022-03-18 02:30:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:04,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:04,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311919889] [2022-03-18 02:30:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:30:04,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:04,752 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:04,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 02:30:04,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:30:04,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:30:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 5192 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:30:05,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5484 backedges. 96 proven. 872 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-18 02:30:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257187818] [2022-03-18 02:30:06,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311919889] [2022-03-18 02:30:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311919889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:06,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-18 02:30:06,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [645936611] [2022-03-18 02:30:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [645936611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:06,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:30:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504906355] [2022-03-18 02:30:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:06,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:30:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:30:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 02:30:06,059 INFO L87 Difference]: Start difference. First operand 1765 states and 2109 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-18 02:30:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:06,909 INFO L93 Difference]: Finished difference Result 1899 states and 2282 transitions. [2022-03-18 02:30:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 02:30:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) Word has length 327 [2022-03-18 02:30:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:06,921 INFO L225 Difference]: With dead ends: 1899 [2022-03-18 02:30:06,921 INFO L226 Difference]: Without dead ends: 1890 [2022-03-18 02:30:06,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:30:06,924 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 78 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:06,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 294 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2022-03-18 02:30:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1888. [2022-03-18 02:30:07,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1230 states have (on average 1.1154471544715447) internal successors, (1372), 1258 states have internal predecessors, (1372), 445 states have call successors, (445), 213 states have call predecessors, (445), 212 states have return successors, (442), 416 states have call predecessors, (442), 442 states have call successors, (442) [2022-03-18 02:30:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2259 transitions. [2022-03-18 02:30:07,515 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2259 transitions. Word has length 327 [2022-03-18 02:30:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:07,515 INFO L478 AbstractCegarLoop]: Abstraction has 1888 states and 2259 transitions. [2022-03-18 02:30:07,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (53), 19 states have call predecessors, (53), 17 states have return successors, (51), 17 states have call predecessors, (51), 18 states have call successors, (51) [2022-03-18 02:30:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2259 transitions. [2022-03-18 02:30:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-03-18 02:30:07,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:07,520 INFO L500 BasicCegarLoop]: trace histogram [52, 51, 51, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:07,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:07,736 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 33 times [2022-03-18 02:30:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:07,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603801127] [2022-03-18 02:30:07,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1842167022, now seen corresponding path program 34 times [2022-03-18 02:30:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332655502] [2022-03-18 02:30:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:07,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:07,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66528524] [2022-03-18 02:30:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:30:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:07,760 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:07,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 02:30:07,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:30:07,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 02:30:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 5882 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 02:30:08,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6192 backedges. 102 proven. 986 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-03-18 02:30:09,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332655502] [2022-03-18 02:30:09,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66528524] [2022-03-18 02:30:09,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66528524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:09,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:09,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-18 02:30:09,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:09,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603801127] [2022-03-18 02:30:09,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603801127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:09,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:09,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:30:09,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795553145] [2022-03-18 02:30:09,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:09,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:30:09,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:30:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:30:09,081 INFO L87 Difference]: Start difference. First operand 1888 states and 2259 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-18 02:30:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:10,020 INFO L93 Difference]: Finished difference Result 2022 states and 2432 transitions. [2022-03-18 02:30:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 02:30:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 346 [2022-03-18 02:30:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:10,029 INFO L225 Difference]: With dead ends: 2022 [2022-03-18 02:30:10,029 INFO L226 Difference]: Without dead ends: 2013 [2022-03-18 02:30:10,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 02:30:10,031 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 66 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:10,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 316 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2022-03-18 02:30:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 2011. [2022-03-18 02:30:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 1309 states have (on average 1.1153552330022918) internal successors, (1460), 1339 states have internal predecessors, (1460), 476 states have call successors, (476), 226 states have call predecessors, (476), 225 states have return successors, (473), 445 states have call predecessors, (473), 473 states have call successors, (473) [2022-03-18 02:30:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2409 transitions. [2022-03-18 02:30:10,623 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2409 transitions. Word has length 346 [2022-03-18 02:30:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:10,623 INFO L478 AbstractCegarLoop]: Abstraction has 2011 states and 2409 transitions. [2022-03-18 02:30:10,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (56), 20 states have call predecessors, (56), 18 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-03-18 02:30:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2409 transitions. [2022-03-18 02:30:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-18 02:30:10,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:10,628 INFO L500 BasicCegarLoop]: trace histogram [55, 54, 54, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:10,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:10,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 02:30:10,847 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 35 times [2022-03-18 02:30:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935136328] [2022-03-18 02:30:10,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash 858728513, now seen corresponding path program 36 times [2022-03-18 02:30:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:10,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609149397] [2022-03-18 02:30:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:10,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:10,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876895393] [2022-03-18 02:30:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:30:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:10,879 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:10,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 02:30:12,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-03-18 02:30:12,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:12,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 02:30:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 6615 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 02:30:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 108 proven. 1107 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-03-18 02:30:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609149397] [2022-03-18 02:30:13,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876895393] [2022-03-18 02:30:13,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876895393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:13,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:13,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-18 02:30:13,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935136328] [2022-03-18 02:30:13,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935136328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:13,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:13,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:30:13,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769562988] [2022-03-18 02:30:13,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:13,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:30:13,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:30:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:30:13,783 INFO L87 Difference]: Start difference. First operand 2011 states and 2409 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-18 02:30:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:14,760 INFO L93 Difference]: Finished difference Result 2145 states and 2582 transitions. [2022-03-18 02:30:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 02:30:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) Word has length 365 [2022-03-18 02:30:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:14,768 INFO L225 Difference]: With dead ends: 2145 [2022-03-18 02:30:14,773 INFO L226 Difference]: Without dead ends: 2136 [2022-03-18 02:30:14,775 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 02:30:14,775 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 47 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:14,776 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 328 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2022-03-18 02:30:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2134. [2022-03-18 02:30:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1388 states have (on average 1.1152737752161384) internal successors, (1548), 1420 states have internal predecessors, (1548), 507 states have call successors, (507), 239 states have call predecessors, (507), 238 states have return successors, (504), 474 states have call predecessors, (504), 504 states have call successors, (504) [2022-03-18 02:30:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 2559 transitions. [2022-03-18 02:30:15,410 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 2559 transitions. Word has length 365 [2022-03-18 02:30:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:15,410 INFO L478 AbstractCegarLoop]: Abstraction has 2134 states and 2559 transitions. [2022-03-18 02:30:15,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (59), 21 states have call predecessors, (59), 19 states have return successors, (57), 19 states have call predecessors, (57), 20 states have call successors, (57) [2022-03-18 02:30:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 2559 transitions. [2022-03-18 02:30:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-03-18 02:30:15,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:15,417 INFO L500 BasicCegarLoop]: trace histogram [58, 57, 57, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:15,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:15,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 02:30:15,626 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 37 times [2022-03-18 02:30:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:15,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275249595] [2022-03-18 02:30:15,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -117637454, now seen corresponding path program 38 times [2022-03-18 02:30:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052380009] [2022-03-18 02:30:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:15,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:15,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310046486] [2022-03-18 02:30:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:30:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:15,635 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:15,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 02:30:15,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:30:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 02:30:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 7391 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-18 02:30:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 114 proven. 1235 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-03-18 02:30:17,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:17,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052380009] [2022-03-18 02:30:17,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:17,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310046486] [2022-03-18 02:30:17,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310046486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:17,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-18 02:30:17,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:17,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275249595] [2022-03-18 02:30:17,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275249595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:17,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:30:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451368059] [2022-03-18 02:30:17,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:17,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:30:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:30:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 02:30:17,360 INFO L87 Difference]: Start difference. First operand 2134 states and 2559 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-18 02:30:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:18,391 INFO L93 Difference]: Finished difference Result 2268 states and 2732 transitions. [2022-03-18 02:30:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 02:30:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) Word has length 384 [2022-03-18 02:30:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:18,410 INFO L225 Difference]: With dead ends: 2268 [2022-03-18 02:30:18,410 INFO L226 Difference]: Without dead ends: 2259 [2022-03-18 02:30:18,411 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 02:30:18,413 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 71 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:18,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 350 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-03-18 02:30:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2257. [2022-03-18 02:30:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 1467 states have (on average 1.1152010906612133) internal successors, (1636), 1501 states have internal predecessors, (1636), 538 states have call successors, (538), 252 states have call predecessors, (538), 251 states have return successors, (535), 503 states have call predecessors, (535), 535 states have call successors, (535) [2022-03-18 02:30:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 2709 transitions. [2022-03-18 02:30:19,048 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 2709 transitions. Word has length 384 [2022-03-18 02:30:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:19,048 INFO L478 AbstractCegarLoop]: Abstraction has 2257 states and 2709 transitions. [2022-03-18 02:30:19,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (62), 22 states have call predecessors, (62), 20 states have return successors, (60), 20 states have call predecessors, (60), 21 states have call successors, (60) [2022-03-18 02:30:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 2709 transitions. [2022-03-18 02:30:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-03-18 02:30:19,053 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:19,054 INFO L500 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:19,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:19,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:19,267 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 39 times [2022-03-18 02:30:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770688268] [2022-03-18 02:30:19,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1169361057, now seen corresponding path program 40 times [2022-03-18 02:30:19,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719413632] [2022-03-18 02:30:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:19,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273737589] [2022-03-18 02:30:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:30:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:19,277 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:19,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 02:30:19,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:30:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:19,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 02:30:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 8210 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-03-18 02:30:20,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 120 proven. 1370 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-03-18 02:30:21,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719413632] [2022-03-18 02:30:21,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273737589] [2022-03-18 02:30:21,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273737589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:21,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-18 02:30:21,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770688268] [2022-03-18 02:30:21,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770688268] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:21,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 02:30:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850506910] [2022-03-18 02:30:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:21,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 02:30:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 02:30:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:30:21,198 INFO L87 Difference]: Start difference. First operand 2257 states and 2709 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-18 02:30:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:22,325 INFO L93 Difference]: Finished difference Result 2391 states and 2882 transitions. [2022-03-18 02:30:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 02:30:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) Word has length 403 [2022-03-18 02:30:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:22,332 INFO L225 Difference]: With dead ends: 2391 [2022-03-18 02:30:22,332 INFO L226 Difference]: Without dead ends: 2382 [2022-03-18 02:30:22,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 02:30:22,333 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 47 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:22,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 372 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-18 02:30:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2380. [2022-03-18 02:30:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 1546 states have (on average 1.1151358344113842) internal successors, (1724), 1582 states have internal predecessors, (1724), 569 states have call successors, (569), 265 states have call predecessors, (569), 264 states have return successors, (566), 532 states have call predecessors, (566), 566 states have call successors, (566) [2022-03-18 02:30:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 2859 transitions. [2022-03-18 02:30:23,021 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 2859 transitions. Word has length 403 [2022-03-18 02:30:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:23,022 INFO L478 AbstractCegarLoop]: Abstraction has 2380 states and 2859 transitions. [2022-03-18 02:30:23,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (65), 23 states have call predecessors, (65), 21 states have return successors, (63), 21 states have call predecessors, (63), 22 states have call successors, (63) [2022-03-18 02:30:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 2859 transitions. [2022-03-18 02:30:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-03-18 02:30:23,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:23,028 INFO L500 BasicCegarLoop]: trace histogram [64, 63, 63, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:23,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-18 02:30:23,239 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:23,239 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 41 times [2022-03-18 02:30:23,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:23,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043806570] [2022-03-18 02:30:23,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash -774012334, now seen corresponding path program 42 times [2022-03-18 02:30:23,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:23,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937247132] [2022-03-18 02:30:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:23,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:23,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093847736] [2022-03-18 02:30:23,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:30:23,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:23,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:23,250 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:23,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 02:30:25,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-03-18 02:30:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 02:30:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 9072 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-03-18 02:30:26,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9454 backedges. 126 proven. 1512 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-03-18 02:30:27,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937247132] [2022-03-18 02:30:27,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093847736] [2022-03-18 02:30:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093847736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:27,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-18 02:30:27,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043806570] [2022-03-18 02:30:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043806570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:27,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 02:30:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915483340] [2022-03-18 02:30:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:27,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 02:30:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 02:30:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 02:30:27,131 INFO L87 Difference]: Start difference. First operand 2380 states and 2859 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-18 02:30:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:28,300 INFO L93 Difference]: Finished difference Result 2514 states and 3032 transitions. [2022-03-18 02:30:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 02:30:28,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) Word has length 422 [2022-03-18 02:30:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:28,307 INFO L225 Difference]: With dead ends: 2514 [2022-03-18 02:30:28,307 INFO L226 Difference]: Without dead ends: 2505 [2022-03-18 02:30:28,308 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 02:30:28,308 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 82 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:28,308 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 344 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-03-18 02:30:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2503. [2022-03-18 02:30:29,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 1625 states have (on average 1.115076923076923) internal successors, (1812), 1663 states have internal predecessors, (1812), 600 states have call successors, (600), 278 states have call predecessors, (600), 277 states have return successors, (597), 561 states have call predecessors, (597), 597 states have call successors, (597) [2022-03-18 02:30:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3009 transitions. [2022-03-18 02:30:29,045 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3009 transitions. Word has length 422 [2022-03-18 02:30:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:29,045 INFO L478 AbstractCegarLoop]: Abstraction has 2503 states and 3009 transitions. [2022-03-18 02:30:29,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (68), 24 states have call predecessors, (68), 22 states have return successors, (66), 22 states have call predecessors, (66), 23 states have call successors, (66) [2022-03-18 02:30:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3009 transitions. [2022-03-18 02:30:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-03-18 02:30:29,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:29,051 INFO L500 BasicCegarLoop]: trace histogram [67, 66, 66, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:29,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:29,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:29,253 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 43 times [2022-03-18 02:30:29,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:29,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194323017] [2022-03-18 02:30:29,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137023, now seen corresponding path program 44 times [2022-03-18 02:30:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:29,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507288822] [2022-03-18 02:30:29,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:29,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:29,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:29,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157290607] [2022-03-18 02:30:29,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:30:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:29,263 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:29,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 02:30:29,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:30:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 02:30:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 9977 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:30:30,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10377 backedges. 132 proven. 1661 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-18 02:30:31,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507288822] [2022-03-18 02:30:31,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157290607] [2022-03-18 02:30:31,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157290607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:31,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:31,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-18 02:30:31,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194323017] [2022-03-18 02:30:31,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194323017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:31,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:31,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 02:30:31,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422061356] [2022-03-18 02:30:31,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:31,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 02:30:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 02:30:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 02:30:31,309 INFO L87 Difference]: Start difference. First operand 2503 states and 3009 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-18 02:30:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:32,535 INFO L93 Difference]: Finished difference Result 2637 states and 3182 transitions. [2022-03-18 02:30:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 02:30:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) Word has length 441 [2022-03-18 02:30:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:32,541 INFO L225 Difference]: With dead ends: 2637 [2022-03-18 02:30:32,541 INFO L226 Difference]: Without dead ends: 2628 [2022-03-18 02:30:32,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 02:30:32,543 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 73 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:32,543 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 366 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2022-03-18 02:30:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2626. [2022-03-18 02:30:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 1704 states have (on average 1.1150234741784038) internal successors, (1900), 1744 states have internal predecessors, (1900), 631 states have call successors, (631), 291 states have call predecessors, (631), 290 states have return successors, (628), 590 states have call predecessors, (628), 628 states have call successors, (628) [2022-03-18 02:30:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 3159 transitions. [2022-03-18 02:30:33,296 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 3159 transitions. Word has length 441 [2022-03-18 02:30:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:33,297 INFO L478 AbstractCegarLoop]: Abstraction has 2626 states and 3159 transitions. [2022-03-18 02:30:33,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (71), 25 states have call predecessors, (71), 23 states have return successors, (69), 23 states have call predecessors, (69), 24 states have call successors, (69) [2022-03-18 02:30:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 3159 transitions. [2022-03-18 02:30:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-03-18 02:30:33,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:33,304 INFO L500 BasicCegarLoop]: trace histogram [70, 69, 69, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:33,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:33,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-18 02:30:33,516 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 45 times [2022-03-18 02:30:33,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:33,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098523783] [2022-03-18 02:30:33,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:33,516 INFO L85 PathProgramCache]: Analyzing trace with hash 568217074, now seen corresponding path program 46 times [2022-03-18 02:30:33,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:33,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556217663] [2022-03-18 02:30:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:33,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:33,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:33,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641278226] [2022-03-18 02:30:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:30:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:33,526 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 02:30:33,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:30:33,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 02:30:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 10925 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-03-18 02:30:34,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11343 backedges. 138 proven. 1817 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-03-18 02:30:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556217663] [2022-03-18 02:30:34,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641278226] [2022-03-18 02:30:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641278226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:34,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:34,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-18 02:30:34,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098523783] [2022-03-18 02:30:34,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098523783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:34,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:34,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 02:30:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522230060] [2022-03-18 02:30:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:34,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 02:30:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 02:30:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 02:30:34,956 INFO L87 Difference]: Start difference. First operand 2626 states and 3159 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-18 02:30:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:36,357 INFO L93 Difference]: Finished difference Result 2760 states and 3332 transitions. [2022-03-18 02:30:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 02:30:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) Word has length 460 [2022-03-18 02:30:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:36,364 INFO L225 Difference]: With dead ends: 2760 [2022-03-18 02:30:36,364 INFO L226 Difference]: Without dead ends: 2751 [2022-03-18 02:30:36,365 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 02:30:36,365 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 81 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:36,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 358 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:30:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2022-03-18 02:30:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2749. [2022-03-18 02:30:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 1783 states have (on average 1.1149747616376893) internal successors, (1988), 1825 states have internal predecessors, (1988), 662 states have call successors, (662), 304 states have call predecessors, (662), 303 states have return successors, (659), 619 states have call predecessors, (659), 659 states have call successors, (659) [2022-03-18 02:30:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3309 transitions. [2022-03-18 02:30:37,165 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3309 transitions. Word has length 460 [2022-03-18 02:30:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:37,166 INFO L478 AbstractCegarLoop]: Abstraction has 2749 states and 3309 transitions. [2022-03-18 02:30:37,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (74), 26 states have call predecessors, (74), 24 states have return successors, (72), 24 states have call predecessors, (72), 25 states have call successors, (72) [2022-03-18 02:30:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3309 transitions. [2022-03-18 02:30:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-03-18 02:30:37,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:37,173 INFO L500 BasicCegarLoop]: trace histogram [73, 72, 72, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:37,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:37,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-18 02:30:37,392 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 47 times [2022-03-18 02:30:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:37,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664723753] [2022-03-18 02:30:37,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1624174945, now seen corresponding path program 48 times [2022-03-18 02:30:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:37,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472534817] [2022-03-18 02:30:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:37,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:37,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457868344] [2022-03-18 02:30:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:30:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:37,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:37,403 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:37,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 02:30:37,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-03-18 02:30:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 02:30:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 11916 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-18 02:30:38,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12352 backedges. 144 proven. 1980 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-03-18 02:30:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472534817] [2022-03-18 02:30:39,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457868344] [2022-03-18 02:30:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457868344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:39,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-18 02:30:39,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664723753] [2022-03-18 02:30:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664723753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:39,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 02:30:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339321253] [2022-03-18 02:30:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:39,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 02:30:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 02:30:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 02:30:39,971 INFO L87 Difference]: Start difference. First operand 2749 states and 3309 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-18 02:30:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:41,398 INFO L93 Difference]: Finished difference Result 2883 states and 3482 transitions. [2022-03-18 02:30:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 02:30:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) Word has length 479 [2022-03-18 02:30:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:41,405 INFO L225 Difference]: With dead ends: 2883 [2022-03-18 02:30:41,405 INFO L226 Difference]: Without dead ends: 2874 [2022-03-18 02:30:41,415 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 02:30:41,418 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 81 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:41,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 400 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2022-03-18 02:30:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2872. [2022-03-18 02:30:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 1862 states have (on average 1.1149301825993556) internal successors, (2076), 1906 states have internal predecessors, (2076), 693 states have call successors, (693), 317 states have call predecessors, (693), 316 states have return successors, (690), 648 states have call predecessors, (690), 690 states have call successors, (690) [2022-03-18 02:30:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3459 transitions. [2022-03-18 02:30:42,274 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3459 transitions. Word has length 479 [2022-03-18 02:30:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:42,274 INFO L478 AbstractCegarLoop]: Abstraction has 2872 states and 3459 transitions. [2022-03-18 02:30:42,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (77), 27 states have call predecessors, (77), 25 states have return successors, (75), 25 states have call predecessors, (75), 26 states have call successors, (75) [2022-03-18 02:30:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3459 transitions. [2022-03-18 02:30:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-03-18 02:30:42,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:42,282 INFO L500 BasicCegarLoop]: trace histogram [76, 75, 75, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:42,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-18 02:30:42,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:42,495 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 49 times [2022-03-18 02:30:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309826952] [2022-03-18 02:30:42,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -695639662, now seen corresponding path program 50 times [2022-03-18 02:30:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854722960] [2022-03-18 02:30:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:42,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491332817] [2022-03-18 02:30:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:30:42,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:42,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:42,506 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:42,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 02:30:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:30:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:30:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 12950 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-18 02:30:43,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13404 backedges. 150 proven. 2150 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-03-18 02:30:44,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854722960] [2022-03-18 02:30:44,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491332817] [2022-03-18 02:30:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491332817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:44,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:44,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-18 02:30:44,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309826952] [2022-03-18 02:30:44,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309826952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:44,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:44,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 02:30:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898511783] [2022-03-18 02:30:44,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:44,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 02:30:44,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 02:30:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 02:30:44,065 INFO L87 Difference]: Start difference. First operand 2872 states and 3459 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-18 02:30:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:45,323 INFO L93 Difference]: Finished difference Result 3006 states and 3632 transitions. [2022-03-18 02:30:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 02:30:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) Word has length 498 [2022-03-18 02:30:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:45,348 INFO L225 Difference]: With dead ends: 3006 [2022-03-18 02:30:45,348 INFO L226 Difference]: Without dead ends: 2997 [2022-03-18 02:30:45,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 941 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 02:30:45,350 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 73 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:45,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 422 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:30:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2022-03-18 02:30:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2995. [2022-03-18 02:30:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 1941 states have (on average 1.1148892323544564) internal successors, (2164), 1987 states have internal predecessors, (2164), 724 states have call successors, (724), 330 states have call predecessors, (724), 329 states have return successors, (721), 677 states have call predecessors, (721), 721 states have call successors, (721) [2022-03-18 02:30:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 3609 transitions. [2022-03-18 02:30:46,239 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 3609 transitions. Word has length 498 [2022-03-18 02:30:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:46,239 INFO L478 AbstractCegarLoop]: Abstraction has 2995 states and 3609 transitions. [2022-03-18 02:30:46,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (80), 28 states have call predecessors, (80), 26 states have return successors, (78), 26 states have call predecessors, (78), 27 states have call successors, (78) [2022-03-18 02:30:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 3609 transitions. [2022-03-18 02:30:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-03-18 02:30:46,247 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:46,247 INFO L500 BasicCegarLoop]: trace histogram [79, 78, 78, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:46,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:46,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:46,467 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 51 times [2022-03-18 02:30:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421477418] [2022-03-18 02:30:46,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash 642972097, now seen corresponding path program 52 times [2022-03-18 02:30:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:46,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233499203] [2022-03-18 02:30:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:46,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:46,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:46,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237839248] [2022-03-18 02:30:46,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:30:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:46,480 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:46,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 02:30:46,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:30:46,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:46,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 02:30:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 14027 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 02:30:47,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14499 backedges. 156 proven. 2327 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-03-18 02:30:49,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233499203] [2022-03-18 02:30:49,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237839248] [2022-03-18 02:30:49,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237839248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:49,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:49,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-18 02:30:49,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:49,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421477418] [2022-03-18 02:30:49,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421477418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:49,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:49,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 02:30:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66480987] [2022-03-18 02:30:49,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:49,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 02:30:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 02:30:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 02:30:49,049 INFO L87 Difference]: Start difference. First operand 2995 states and 3609 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-18 02:30:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:50,405 INFO L93 Difference]: Finished difference Result 3129 states and 3782 transitions. [2022-03-18 02:30:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 02:30:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) Word has length 517 [2022-03-18 02:30:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:50,432 INFO L225 Difference]: With dead ends: 3129 [2022-03-18 02:30:50,432 INFO L226 Difference]: Without dead ends: 3120 [2022-03-18 02:30:50,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 977 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 02:30:50,433 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 116 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:50,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 414 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-03-18 02:30:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3118. [2022-03-18 02:30:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 2020 states have (on average 1.114851485148515) internal successors, (2252), 2068 states have internal predecessors, (2252), 755 states have call successors, (755), 343 states have call predecessors, (755), 342 states have return successors, (752), 706 states have call predecessors, (752), 752 states have call successors, (752) [2022-03-18 02:30:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 3759 transitions. [2022-03-18 02:30:51,364 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 3759 transitions. Word has length 517 [2022-03-18 02:30:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:51,365 INFO L478 AbstractCegarLoop]: Abstraction has 3118 states and 3759 transitions. [2022-03-18 02:30:51,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (83), 29 states have call predecessors, (83), 27 states have return successors, (81), 27 states have call predecessors, (81), 28 states have call successors, (81) [2022-03-18 02:30:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 3759 transitions. [2022-03-18 02:30:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-03-18 02:30:51,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:51,372 INFO L500 BasicCegarLoop]: trace histogram [82, 81, 81, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:51,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 02:30:51,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:51,576 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 53 times [2022-03-18 02:30:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:51,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640742706] [2022-03-18 02:30:51,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1709751602, now seen corresponding path program 54 times [2022-03-18 02:30:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:51,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072422942] [2022-03-18 02:30:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:51,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:51,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671239486] [2022-03-18 02:30:51,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:30:51,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:51,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:51,608 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:51,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 02:30:52,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-18 02:30:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 02:30:52,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 15147 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-03-18 02:30:52,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15637 backedges. 162 proven. 2511 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-03-18 02:30:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072422942] [2022-03-18 02:30:53,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:53,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671239486] [2022-03-18 02:30:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671239486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:53,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:53,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-18 02:30:53,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640742706] [2022-03-18 02:30:53,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640742706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:53,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:53,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 02:30:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454073015] [2022-03-18 02:30:53,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:53,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 02:30:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 02:30:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 02:30:53,649 INFO L87 Difference]: Start difference. First operand 3118 states and 3759 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-18 02:30:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:30:55,079 INFO L93 Difference]: Finished difference Result 3252 states and 3932 transitions. [2022-03-18 02:30:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 02:30:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) Word has length 536 [2022-03-18 02:30:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:30:55,104 INFO L225 Difference]: With dead ends: 3252 [2022-03-18 02:30:55,105 INFO L226 Difference]: Without dead ends: 3243 [2022-03-18 02:30:55,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 02:30:55,107 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 98 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:30:55,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 426 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:30:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2022-03-18 02:30:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3241. [2022-03-18 02:30:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 2099 states have (on average 1.1148165793234874) internal successors, (2340), 2149 states have internal predecessors, (2340), 786 states have call successors, (786), 356 states have call predecessors, (786), 355 states have return successors, (783), 735 states have call predecessors, (783), 783 states have call successors, (783) [2022-03-18 02:30:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 3909 transitions. [2022-03-18 02:30:56,068 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 3909 transitions. Word has length 536 [2022-03-18 02:30:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:30:56,069 INFO L478 AbstractCegarLoop]: Abstraction has 3241 states and 3909 transitions. [2022-03-18 02:30:56,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (86), 30 states have call predecessors, (86), 28 states have return successors, (84), 28 states have call predecessors, (84), 29 states have call successors, (84) [2022-03-18 02:30:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 3909 transitions. [2022-03-18 02:30:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-03-18 02:30:56,077 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:30:56,077 INFO L500 BasicCegarLoop]: trace histogram [85, 84, 84, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:30:56,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-18 02:30:56,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-18 02:30:56,287 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:30:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:30:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 55 times [2022-03-18 02:30:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:56,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944306424] [2022-03-18 02:30:56,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:30:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 284015137, now seen corresponding path program 56 times [2022-03-18 02:30:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:30:56,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752773906] [2022-03-18 02:30:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:30:56,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:30:56,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:30:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540926837] [2022-03-18 02:30:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:30:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:30:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:30:56,299 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:30:56,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 02:30:56,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:30:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:30:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 02:30:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:30:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 16310 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-18 02:30:57,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:30:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16818 backedges. 168 proven. 2702 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-03-18 02:30:58,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:30:58,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752773906] [2022-03-18 02:30:58,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:30:58,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540926837] [2022-03-18 02:30:58,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540926837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:30:58,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:30:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-18 02:30:58,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:30:58,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944306424] [2022-03-18 02:30:58,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944306424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:30:58,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:30:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 02:30:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104933946] [2022-03-18 02:30:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:30:58,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 02:30:58,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:30:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 02:30:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 02:30:58,766 INFO L87 Difference]: Start difference. First operand 3241 states and 3909 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-18 02:31:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:00,600 INFO L93 Difference]: Finished difference Result 3375 states and 4082 transitions. [2022-03-18 02:31:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 02:31:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) Word has length 555 [2022-03-18 02:31:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:00,607 INFO L225 Difference]: With dead ends: 3375 [2022-03-18 02:31:00,608 INFO L226 Difference]: Without dead ends: 3366 [2022-03-18 02:31:00,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 02:31:00,609 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 96 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:00,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 448 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:31:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2022-03-18 02:31:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3364. [2022-03-18 02:31:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 2178 states have (on average 1.1147842056932966) internal successors, (2428), 2230 states have internal predecessors, (2428), 817 states have call successors, (817), 369 states have call predecessors, (817), 368 states have return successors, (814), 764 states have call predecessors, (814), 814 states have call successors, (814) [2022-03-18 02:31:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 4059 transitions. [2022-03-18 02:31:01,572 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 4059 transitions. Word has length 555 [2022-03-18 02:31:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:01,572 INFO L478 AbstractCegarLoop]: Abstraction has 3364 states and 4059 transitions. [2022-03-18 02:31:01,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (89), 31 states have call predecessors, (89), 29 states have return successors, (87), 29 states have call predecessors, (87), 30 states have call successors, (87) [2022-03-18 02:31:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 4059 transitions. [2022-03-18 02:31:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-03-18 02:31:01,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:01,580 INFO L500 BasicCegarLoop]: trace histogram [88, 87, 87, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:01,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:01,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 02:31:01,783 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 57 times [2022-03-18 02:31:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:01,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682691926] [2022-03-18 02:31:01,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1854300370, now seen corresponding path program 58 times [2022-03-18 02:31:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:01,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285572599] [2022-03-18 02:31:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:01,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:01,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:01,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904832297] [2022-03-18 02:31:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:31:01,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:01,810 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:01,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 02:31:02,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:31:02,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:31:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 02:31:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:31:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 17516 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-18 02:31:03,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:31:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18042 backedges. 174 proven. 2900 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-03-18 02:31:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:31:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285572599] [2022-03-18 02:31:04,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:31:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904832297] [2022-03-18 02:31:04,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904832297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:31:04,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:31:04,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-18 02:31:04,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:31:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682691926] [2022-03-18 02:31:04,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682691926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:31:04,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:31:04,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 02:31:04,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110469630] [2022-03-18 02:31:04,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:31:04,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 02:31:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 02:31:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 02:31:04,309 INFO L87 Difference]: Start difference. First operand 3364 states and 4059 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-18 02:31:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:31:05,844 INFO L93 Difference]: Finished difference Result 3498 states and 4232 transitions. [2022-03-18 02:31:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 02:31:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) Word has length 574 [2022-03-18 02:31:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:31:05,852 INFO L225 Difference]: With dead ends: 3498 [2022-03-18 02:31:05,852 INFO L226 Difference]: Without dead ends: 3489 [2022-03-18 02:31:05,853 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1085 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 02:31:05,854 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 111 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:31:05,854 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 460 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:31:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-03-18 02:31:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3487. [2022-03-18 02:31:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 2257 states have (on average 1.1147540983606556) internal successors, (2516), 2311 states have internal predecessors, (2516), 848 states have call successors, (848), 382 states have call predecessors, (848), 381 states have return successors, (845), 793 states have call predecessors, (845), 845 states have call successors, (845) [2022-03-18 02:31:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 4209 transitions. [2022-03-18 02:31:06,866 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 4209 transitions. Word has length 574 [2022-03-18 02:31:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:31:06,867 INFO L478 AbstractCegarLoop]: Abstraction has 3487 states and 4209 transitions. [2022-03-18 02:31:06,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (92), 32 states have call predecessors, (92), 30 states have return successors, (90), 30 states have call predecessors, (90), 31 states have call successors, (90) [2022-03-18 02:31:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 4209 transitions. [2022-03-18 02:31:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-03-18 02:31:06,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:31:06,875 INFO L500 BasicCegarLoop]: trace histogram [91, 90, 90, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:31:06,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 02:31:07,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:07,094 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:31:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:31:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 59 times [2022-03-18 02:31:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:31:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691386523] [2022-03-18 02:31:07,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:31:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1372926593, now seen corresponding path program 60 times [2022-03-18 02:31:07,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:31:07,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388026449] [2022-03-18 02:31:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:31:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:31:07,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:31:07,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371662624] [2022-03-18 02:31:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:31:07,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:31:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:31:07,106 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:31:07,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 02:32:29,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2022-03-18 02:32:29,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 02:32:29,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 18765 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 02:32:30,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19309 backedges. 180 proven. 3105 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-03-18 02:32:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:31,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388026449] [2022-03-18 02:32:31,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:31,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371662624] [2022-03-18 02:32:31,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371662624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:31,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:31,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-18 02:32:31,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:31,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691386523] [2022-03-18 02:32:31,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691386523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:31,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:31,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 02:32:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129199330] [2022-03-18 02:32:31,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:31,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 02:32:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 02:32:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 02:32:31,335 INFO L87 Difference]: Start difference. First operand 3487 states and 4209 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-18 02:32:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:32,895 INFO L93 Difference]: Finished difference Result 3621 states and 4382 transitions. [2022-03-18 02:32:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 02:32:32,896 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) Word has length 593 [2022-03-18 02:32:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:32,904 INFO L225 Difference]: With dead ends: 3621 [2022-03-18 02:32:32,904 INFO L226 Difference]: Without dead ends: 3612 [2022-03-18 02:32:32,905 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 02:32:32,906 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 93 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:32,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 492 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:32:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2022-03-18 02:32:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3610. [2022-03-18 02:32:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 2336 states have (on average 1.1147260273972603) internal successors, (2604), 2392 states have internal predecessors, (2604), 879 states have call successors, (879), 395 states have call predecessors, (879), 394 states have return successors, (876), 822 states have call predecessors, (876), 876 states have call successors, (876) [2022-03-18 02:32:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 4359 transitions. [2022-03-18 02:32:33,948 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 4359 transitions. Word has length 593 [2022-03-18 02:32:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:33,949 INFO L478 AbstractCegarLoop]: Abstraction has 3610 states and 4359 transitions. [2022-03-18 02:32:33,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (95), 33 states have call predecessors, (95), 31 states have return successors, (93), 31 states have call predecessors, (93), 32 states have call successors, (93) [2022-03-18 02:32:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 4359 transitions. [2022-03-18 02:32:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-03-18 02:32:33,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:33,957 INFO L500 BasicCegarLoop]: trace histogram [94, 93, 93, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:33,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:34,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:34,170 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 61 times [2022-03-18 02:32:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913071968] [2022-03-18 02:32:34,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1466715250, now seen corresponding path program 62 times [2022-03-18 02:32:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345096876] [2022-03-18 02:32:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:34,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991946122] [2022-03-18 02:32:34,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:32:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:34,182 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:34,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 02:32:34,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:32:34,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 02:32:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 20057 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-03-18 02:32:35,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20619 backedges. 186 proven. 3317 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-03-18 02:32:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345096876] [2022-03-18 02:32:37,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991946122] [2022-03-18 02:32:37,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991946122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:37,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:37,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-18 02:32:37,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913071968] [2022-03-18 02:32:37,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913071968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:37,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:37,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 02:32:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698491516] [2022-03-18 02:32:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:37,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 02:32:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 02:32:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 02:32:37,409 INFO L87 Difference]: Start difference. First operand 3610 states and 4359 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-18 02:32:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:39,329 INFO L93 Difference]: Finished difference Result 3744 states and 4532 transitions. [2022-03-18 02:32:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 02:32:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) Word has length 612 [2022-03-18 02:32:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:39,355 INFO L225 Difference]: With dead ends: 3744 [2022-03-18 02:32:39,355 INFO L226 Difference]: Without dead ends: 3735 [2022-03-18 02:32:39,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 1157 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 02:32:39,377 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 127 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:39,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 464 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:32:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-03-18 02:32:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3733. [2022-03-18 02:32:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 2415 states have (on average 1.1146997929606626) internal successors, (2692), 2473 states have internal predecessors, (2692), 910 states have call successors, (910), 408 states have call predecessors, (910), 407 states have return successors, (907), 851 states have call predecessors, (907), 907 states have call successors, (907) [2022-03-18 02:32:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 4509 transitions. [2022-03-18 02:32:40,479 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 4509 transitions. Word has length 612 [2022-03-18 02:32:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:40,479 INFO L478 AbstractCegarLoop]: Abstraction has 3733 states and 4509 transitions. [2022-03-18 02:32:40,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (98), 34 states have call predecessors, (98), 32 states have return successors, (96), 32 states have call predecessors, (96), 33 states have call successors, (96) [2022-03-18 02:32:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 4509 transitions. [2022-03-18 02:32:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-03-18 02:32:40,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:40,487 INFO L500 BasicCegarLoop]: trace histogram [97, 96, 96, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:40,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:40,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:40,707 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:40,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 63 times [2022-03-18 02:32:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105711556] [2022-03-18 02:32:40,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2118163743, now seen corresponding path program 64 times [2022-03-18 02:32:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:40,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10777628] [2022-03-18 02:32:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:40,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:40,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837435988] [2022-03-18 02:32:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:32:40,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:40,733 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:40,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 02:32:40,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:32:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 02:32:40,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 21392 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-03-18 02:32:42,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 192 proven. 3536 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-03-18 02:32:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10777628] [2022-03-18 02:32:44,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:44,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837435988] [2022-03-18 02:32:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837435988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:44,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:44,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-18 02:32:44,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105711556] [2022-03-18 02:32:44,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105711556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:44,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:44,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 02:32:44,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445906712] [2022-03-18 02:32:44,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:44,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 02:32:44,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 02:32:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 02:32:44,166 INFO L87 Difference]: Start difference. First operand 3733 states and 4509 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-18 02:32:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:45,899 INFO L93 Difference]: Finished difference Result 3867 states and 4682 transitions. [2022-03-18 02:32:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 02:32:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) Word has length 631 [2022-03-18 02:32:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:45,909 INFO L225 Difference]: With dead ends: 3867 [2022-03-18 02:32:45,910 INFO L226 Difference]: Without dead ends: 3858 [2022-03-18 02:32:45,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1193 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 02:32:45,912 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 134 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:45,912 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 486 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:32:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2022-03-18 02:32:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3856. [2022-03-18 02:32:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 2494 states have (on average 1.1146752205292703) internal successors, (2780), 2554 states have internal predecessors, (2780), 941 states have call successors, (941), 421 states have call predecessors, (941), 420 states have return successors, (938), 880 states have call predecessors, (938), 938 states have call successors, (938) [2022-03-18 02:32:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 4659 transitions. [2022-03-18 02:32:47,057 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 4659 transitions. Word has length 631 [2022-03-18 02:32:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:47,057 INFO L478 AbstractCegarLoop]: Abstraction has 3856 states and 4659 transitions. [2022-03-18 02:32:47,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (101), 35 states have call predecessors, (101), 33 states have return successors, (99), 33 states have call predecessors, (99), 34 states have call successors, (99) [2022-03-18 02:32:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 4659 transitions. [2022-03-18 02:32:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-18 02:32:47,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:47,066 INFO L500 BasicCegarLoop]: trace histogram [100, 99, 99, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:47,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:47,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:47,279 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 65 times [2022-03-18 02:32:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:47,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327268296] [2022-03-18 02:32:47,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash -266043374, now seen corresponding path program 66 times [2022-03-18 02:32:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:47,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640279511] [2022-03-18 02:32:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:47,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:47,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830900201] [2022-03-18 02:32:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:32:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:47,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:47,296 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:47,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 02:32:47,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2022-03-18 02:32:47,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 02:32:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 22770 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 02:32:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 23368 backedges. 198 proven. 3762 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-03-18 02:32:51,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:51,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640279511] [2022-03-18 02:32:51,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:51,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830900201] [2022-03-18 02:32:51,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830900201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:51,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:51,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-18 02:32:51,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:51,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327268296] [2022-03-18 02:32:51,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327268296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:51,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:51,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 02:32:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162783075] [2022-03-18 02:32:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:51,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 02:32:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 02:32:51,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 02:32:51,113 INFO L87 Difference]: Start difference. First operand 3856 states and 4659 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-18 02:32:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:52,939 INFO L93 Difference]: Finished difference Result 3990 states and 4832 transitions. [2022-03-18 02:32:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 02:32:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) Word has length 650 [2022-03-18 02:32:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:52,948 INFO L225 Difference]: With dead ends: 3990 [2022-03-18 02:32:52,948 INFO L226 Difference]: Without dead ends: 3981 [2022-03-18 02:32:52,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 1229 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 02:32:52,949 INFO L912 BasicCegarLoop]: 131 mSDtfsCounter, 118 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:52,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 518 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:32:52,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2022-03-18 02:32:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3979. [2022-03-18 02:32:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 2573 states have (on average 1.1146521570151573) internal successors, (2868), 2635 states have internal predecessors, (2868), 972 states have call successors, (972), 434 states have call predecessors, (972), 433 states have return successors, (969), 909 states have call predecessors, (969), 969 states have call successors, (969) [2022-03-18 02:32:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 4809 transitions. [2022-03-18 02:32:54,105 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 4809 transitions. Word has length 650 [2022-03-18 02:32:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:32:54,105 INFO L478 AbstractCegarLoop]: Abstraction has 3979 states and 4809 transitions. [2022-03-18 02:32:54,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (104), 36 states have call predecessors, (104), 34 states have return successors, (102), 34 states have call predecessors, (102), 35 states have call successors, (102) [2022-03-18 02:32:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 4809 transitions. [2022-03-18 02:32:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-03-18 02:32:54,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:32:54,115 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 102, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:32:54,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 02:32:54,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-18 02:32:54,319 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:32:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:32:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 67 times [2022-03-18 02:32:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:54,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592113801] [2022-03-18 02:32:54,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:32:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 14830401, now seen corresponding path program 68 times [2022-03-18 02:32:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:32:54,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179749726] [2022-03-18 02:32:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:32:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:32:54,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:32:54,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159097502] [2022-03-18 02:32:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:32:54,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:32:54,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:32:54,334 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:32:54,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 02:32:54,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:32:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:32:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 02:32:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:32:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 24191 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-03-18 02:32:55,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:32:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24807 backedges. 204 proven. 3995 refuted. 0 times theorem prover too weak. 20608 trivial. 0 not checked. [2022-03-18 02:32:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:32:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179749726] [2022-03-18 02:32:57,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:32:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159097502] [2022-03-18 02:32:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159097502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:32:57,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:32:57,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-18 02:32:57,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:32:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592113801] [2022-03-18 02:32:57,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592113801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:32:57,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:32:57,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 02:32:57,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642898397] [2022-03-18 02:32:57,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:32:57,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 02:32:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:32:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 02:32:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 02:32:57,357 INFO L87 Difference]: Start difference. First operand 3979 states and 4809 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-18 02:32:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:32:59,212 INFO L93 Difference]: Finished difference Result 4113 states and 4982 transitions. [2022-03-18 02:32:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 02:32:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) Word has length 669 [2022-03-18 02:32:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:32:59,222 INFO L225 Difference]: With dead ends: 4113 [2022-03-18 02:32:59,223 INFO L226 Difference]: Without dead ends: 4104 [2022-03-18 02:32:59,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 02:32:59,225 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 123 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:32:59,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 530 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:32:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2022-03-18 02:33:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 4102. [2022-03-18 02:33:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4102 states, 2652 states have (on average 1.114630467571644) internal successors, (2956), 2716 states have internal predecessors, (2956), 1003 states have call successors, (1003), 447 states have call predecessors, (1003), 446 states have return successors, (1000), 938 states have call predecessors, (1000), 1000 states have call successors, (1000) [2022-03-18 02:33:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 4959 transitions. [2022-03-18 02:33:00,503 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 4959 transitions. Word has length 669 [2022-03-18 02:33:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:00,503 INFO L478 AbstractCegarLoop]: Abstraction has 4102 states and 4959 transitions. [2022-03-18 02:33:00,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (107), 37 states have call predecessors, (107), 35 states have return successors, (105), 35 states have call predecessors, (105), 36 states have call successors, (105) [2022-03-18 02:33:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 4959 transitions. [2022-03-18 02:33:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-03-18 02:33:00,513 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:00,513 INFO L500 BasicCegarLoop]: trace histogram [106, 105, 105, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:00,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:00,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:00,728 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 69 times [2022-03-18 02:33:00,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:00,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656007709] [2022-03-18 02:33:00,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 280558514, now seen corresponding path program 70 times [2022-03-18 02:33:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:00,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678456031] [2022-03-18 02:33:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:00,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:00,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325865398] [2022-03-18 02:33:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:00,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:00,741 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:00,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 02:33:00,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:00,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 02:33:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 25655 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 02:33:02,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 26289 backedges. 210 proven. 4235 refuted. 0 times theorem prover too weak. 21844 trivial. 0 not checked. [2022-03-18 02:33:04,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678456031] [2022-03-18 02:33:04,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325865398] [2022-03-18 02:33:04,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325865398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:04,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:04,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-18 02:33:04,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656007709] [2022-03-18 02:33:04,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656007709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:04,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:04,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 02:33:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336179999] [2022-03-18 02:33:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:04,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 02:33:04,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 02:33:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 02:33:04,210 INFO L87 Difference]: Start difference. First operand 4102 states and 4959 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-18 02:33:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:06,104 INFO L93 Difference]: Finished difference Result 4236 states and 5132 transitions. [2022-03-18 02:33:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 02:33:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) Word has length 688 [2022-03-18 02:33:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:06,113 INFO L225 Difference]: With dead ends: 4236 [2022-03-18 02:33:06,114 INFO L226 Difference]: Without dead ends: 4227 [2022-03-18 02:33:06,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1301 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 02:33:06,115 INFO L912 BasicCegarLoop]: 137 mSDtfsCounter, 104 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:06,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 562 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:33:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2022-03-18 02:33:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2022-03-18 02:33:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 2731 states have (on average 1.1146100329549615) internal successors, (3044), 2797 states have internal predecessors, (3044), 1034 states have call successors, (1034), 460 states have call predecessors, (1034), 459 states have return successors, (1031), 967 states have call predecessors, (1031), 1031 states have call successors, (1031) [2022-03-18 02:33:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 5109 transitions. [2022-03-18 02:33:07,373 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 5109 transitions. Word has length 688 [2022-03-18 02:33:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:07,374 INFO L478 AbstractCegarLoop]: Abstraction has 4225 states and 5109 transitions. [2022-03-18 02:33:07,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (110), 38 states have call predecessors, (110), 36 states have return successors, (108), 36 states have call predecessors, (108), 37 states have call successors, (108) [2022-03-18 02:33:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 5109 transitions. [2022-03-18 02:33:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-03-18 02:33:07,383 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:07,383 INFO L500 BasicCegarLoop]: trace histogram [109, 108, 108, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:07,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:07,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-18 02:33:07,603 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 71 times [2022-03-18 02:33:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898435900] [2022-03-18 02:33:07,603 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:07,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1458826145, now seen corresponding path program 72 times [2022-03-18 02:33:07,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:07,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866157314] [2022-03-18 02:33:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:07,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:07,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:07,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443874795] [2022-03-18 02:33:07,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:07,616 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 02:33:08,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-18 02:33:08,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:08,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 02:33:08,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 27162 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-03-18 02:33:09,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 27814 backedges. 216 proven. 4482 refuted. 0 times theorem prover too weak. 23116 trivial. 0 not checked. [2022-03-18 02:33:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866157314] [2022-03-18 02:33:11,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:11,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443874795] [2022-03-18 02:33:11,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443874795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:11,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:11,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-03-18 02:33:11,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:11,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898435900] [2022-03-18 02:33:11,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898435900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:11,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:11,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 02:33:11,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631798521] [2022-03-18 02:33:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:11,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 02:33:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:11,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 02:33:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 02:33:11,697 INFO L87 Difference]: Start difference. First operand 4225 states and 5109 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-18 02:33:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:13,929 INFO L93 Difference]: Finished difference Result 4359 states and 5282 transitions. [2022-03-18 02:33:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 02:33:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) Word has length 707 [2022-03-18 02:33:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:13,938 INFO L225 Difference]: With dead ends: 4359 [2022-03-18 02:33:13,939 INFO L226 Difference]: Without dead ends: 4350 [2022-03-18 02:33:13,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1337 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 02:33:13,941 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 136 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:13,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 544 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:33:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2022-03-18 02:33:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 4348. [2022-03-18 02:33:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 2810 states have (on average 1.1145907473309609) internal successors, (3132), 2878 states have internal predecessors, (3132), 1065 states have call successors, (1065), 473 states have call predecessors, (1065), 472 states have return successors, (1062), 996 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-03-18 02:33:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 5259 transitions. [2022-03-18 02:33:15,182 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 5259 transitions. Word has length 707 [2022-03-18 02:33:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:15,182 INFO L478 AbstractCegarLoop]: Abstraction has 4348 states and 5259 transitions. [2022-03-18 02:33:15,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (113), 39 states have call predecessors, (113), 37 states have return successors, (111), 37 states have call predecessors, (111), 38 states have call successors, (111) [2022-03-18 02:33:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 5259 transitions. [2022-03-18 02:33:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-03-18 02:33:15,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:15,192 INFO L500 BasicCegarLoop]: trace histogram [112, 111, 111, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:15,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:15,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-18 02:33:15,412 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 73 times [2022-03-18 02:33:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:15,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047532527] [2022-03-18 02:33:15,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash 968081234, now seen corresponding path program 74 times [2022-03-18 02:33:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:15,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813841310] [2022-03-18 02:33:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:15,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:15,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143046526] [2022-03-18 02:33:15,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:33:15,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:15,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:15,440 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:15,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 02:33:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:33:15,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:33:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 28712 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 02:33:17,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29382 backedges. 222 proven. 4736 refuted. 0 times theorem prover too weak. 24424 trivial. 0 not checked. [2022-03-18 02:33:19,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:19,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813841310] [2022-03-18 02:33:19,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:19,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143046526] [2022-03-18 02:33:19,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143046526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:19,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:19,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-03-18 02:33:19,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047532527] [2022-03-18 02:33:19,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047532527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:19,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:19,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 02:33:19,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107331655] [2022-03-18 02:33:19,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:19,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 02:33:19,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:19,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 02:33:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 02:33:19,032 INFO L87 Difference]: Start difference. First operand 4348 states and 5259 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-18 02:33:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:21,089 INFO L93 Difference]: Finished difference Result 4482 states and 5432 transitions. [2022-03-18 02:33:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 02:33:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) Word has length 726 [2022-03-18 02:33:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:21,098 INFO L225 Difference]: With dead ends: 4482 [2022-03-18 02:33:21,098 INFO L226 Difference]: Without dead ends: 4473 [2022-03-18 02:33:21,100 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1488 GetRequests, 1373 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 02:33:21,100 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 122 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:21,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 586 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:33:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2022-03-18 02:33:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 4471. [2022-03-18 02:33:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 2889 states have (on average 1.1145725164416753) internal successors, (3220), 2959 states have internal predecessors, (3220), 1096 states have call successors, (1096), 486 states have call predecessors, (1096), 485 states have return successors, (1093), 1025 states have call predecessors, (1093), 1093 states have call successors, (1093) [2022-03-18 02:33:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 5409 transitions. [2022-03-18 02:33:22,408 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 5409 transitions. Word has length 726 [2022-03-18 02:33:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:22,408 INFO L478 AbstractCegarLoop]: Abstraction has 4471 states and 5409 transitions. [2022-03-18 02:33:22,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (116), 40 states have call predecessors, (116), 38 states have return successors, (114), 38 states have call predecessors, (114), 39 states have call successors, (114) [2022-03-18 02:33:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 5409 transitions. [2022-03-18 02:33:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-03-18 02:33:22,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:22,418 INFO L500 BasicCegarLoop]: trace histogram [115, 114, 114, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:22,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:22,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-18 02:33:22,638 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 75 times [2022-03-18 02:33:22,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:22,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045539217] [2022-03-18 02:33:22,639 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1825946623, now seen corresponding path program 76 times [2022-03-18 02:33:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:22,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095090315] [2022-03-18 02:33:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:22,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:22,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450033198] [2022-03-18 02:33:22,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:33:22,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:22,652 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 02:33:22,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:33:22,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 02:33:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 30305 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-03-18 02:33:23,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30993 backedges. 228 proven. 4997 refuted. 0 times theorem prover too weak. 25768 trivial. 0 not checked. [2022-03-18 02:33:25,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:25,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095090315] [2022-03-18 02:33:25,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:25,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450033198] [2022-03-18 02:33:25,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450033198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:25,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:25,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-03-18 02:33:25,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:25,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045539217] [2022-03-18 02:33:25,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045539217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:25,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:25,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 02:33:25,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968759402] [2022-03-18 02:33:25,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:25,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 02:33:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 02:33:25,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 02:33:25,491 INFO L87 Difference]: Start difference. First operand 4471 states and 5409 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-18 02:33:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:33:27,913 INFO L93 Difference]: Finished difference Result 4605 states and 5582 transitions. [2022-03-18 02:33:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 02:33:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) Word has length 745 [2022-03-18 02:33:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:33:27,924 INFO L225 Difference]: With dead ends: 4605 [2022-03-18 02:33:27,924 INFO L226 Difference]: Without dead ends: 4596 [2022-03-18 02:33:27,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 02:33:27,926 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 122 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:33:27,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 568 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:33:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2022-03-18 02:33:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 4594. [2022-03-18 02:33:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4594 states, 2968 states have (on average 1.11455525606469) internal successors, (3308), 3040 states have internal predecessors, (3308), 1127 states have call successors, (1127), 499 states have call predecessors, (1127), 498 states have return successors, (1124), 1054 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-03-18 02:33:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4594 states to 4594 states and 5559 transitions. [2022-03-18 02:33:29,284 INFO L78 Accepts]: Start accepts. Automaton has 4594 states and 5559 transitions. Word has length 745 [2022-03-18 02:33:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:33:29,285 INFO L478 AbstractCegarLoop]: Abstraction has 4594 states and 5559 transitions. [2022-03-18 02:33:29,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (119), 41 states have call predecessors, (119), 39 states have return successors, (117), 39 states have call predecessors, (117), 40 states have call successors, (117) [2022-03-18 02:33:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4594 states and 5559 transitions. [2022-03-18 02:33:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2022-03-18 02:33:29,295 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:33:29,295 INFO L500 BasicCegarLoop]: trace histogram [118, 117, 117, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:33:29,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 02:33:29,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-18 02:33:29,512 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:33:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:33:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 77 times [2022-03-18 02:33:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970266988] [2022-03-18 02:33:29,513 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:33:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 874433266, now seen corresponding path program 78 times [2022-03-18 02:33:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:33:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570406629] [2022-03-18 02:33:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:33:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:33:29,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:33:29,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773921799] [2022-03-18 02:33:29,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:33:29,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:33:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:33:29,527 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:33:29,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 02:33:53,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-03-18 02:33:53,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:33:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 02:33:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:33:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 31941 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-03-18 02:33:55,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:33:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32647 backedges. 234 proven. 5265 refuted. 0 times theorem prover too weak. 27148 trivial. 0 not checked. [2022-03-18 02:33:57,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:33:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570406629] [2022-03-18 02:33:57,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:33:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773921799] [2022-03-18 02:33:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773921799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:33:57,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:33:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-03-18 02:33:57,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:33:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970266988] [2022-03-18 02:33:57,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970266988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:33:57,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:33:57,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 02:33:57,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906101681] [2022-03-18 02:33:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:33:57,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 02:33:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:33:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 02:33:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 02:33:57,724 INFO L87 Difference]: Start difference. First operand 4594 states and 5559 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-18 02:34:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:00,159 INFO L93 Difference]: Finished difference Result 4728 states and 5732 transitions. [2022-03-18 02:34:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 02:34:00,160 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) Word has length 764 [2022-03-18 02:34:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:00,170 INFO L225 Difference]: With dead ends: 4728 [2022-03-18 02:34:00,170 INFO L226 Difference]: Without dead ends: 4719 [2022-03-18 02:34:00,172 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1445 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 02:34:00,172 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 126 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:00,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 620 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:34:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2022-03-18 02:34:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 4717. [2022-03-18 02:34:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 3047 states have (on average 1.1145388907121758) internal successors, (3396), 3121 states have internal predecessors, (3396), 1158 states have call successors, (1158), 512 states have call predecessors, (1158), 511 states have return successors, (1155), 1083 states have call predecessors, (1155), 1155 states have call successors, (1155) [2022-03-18 02:34:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 5709 transitions. [2022-03-18 02:34:01,585 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 5709 transitions. Word has length 764 [2022-03-18 02:34:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:01,586 INFO L478 AbstractCegarLoop]: Abstraction has 4717 states and 5709 transitions. [2022-03-18 02:34:01,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (122), 42 states have call predecessors, (122), 40 states have return successors, (120), 40 states have call predecessors, (120), 41 states have call successors, (120) [2022-03-18 02:34:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 5709 transitions. [2022-03-18 02:34:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-03-18 02:34:01,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:01,596 INFO L500 BasicCegarLoop]: trace histogram [121, 120, 120, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:01,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:01,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:01,811 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 79 times [2022-03-18 02:34:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950442141] [2022-03-18 02:34:01,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1405397919, now seen corresponding path program 80 times [2022-03-18 02:34:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:01,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741466171] [2022-03-18 02:34:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:01,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331980882] [2022-03-18 02:34:01,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:01,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:01,825 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:01,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 02:34:02,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:02,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:02,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1699 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 02:34:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 33620 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 02:34:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34344 backedges. 240 proven. 5540 refuted. 0 times theorem prover too weak. 28564 trivial. 0 not checked. [2022-03-18 02:34:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741466171] [2022-03-18 02:34:04,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331980882] [2022-03-18 02:34:04,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331980882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:04,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-03-18 02:34:04,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950442141] [2022-03-18 02:34:04,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950442141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:04,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:04,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 02:34:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931342539] [2022-03-18 02:34:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:04,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 02:34:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 02:34:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 02:34:04,995 INFO L87 Difference]: Start difference. First operand 4717 states and 5709 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-18 02:34:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:07,192 INFO L93 Difference]: Finished difference Result 4851 states and 5882 transitions. [2022-03-18 02:34:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 02:34:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) Word has length 783 [2022-03-18 02:34:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:07,203 INFO L225 Difference]: With dead ends: 4851 [2022-03-18 02:34:07,203 INFO L226 Difference]: Without dead ends: 4842 [2022-03-18 02:34:07,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1605 GetRequests, 1481 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 02:34:07,205 INFO L912 BasicCegarLoop]: 152 mSDtfsCounter, 168 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:07,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 582 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2022-03-18 02:34:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4840. [2022-03-18 02:34:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4840 states, 3126 states have (on average 1.1145233525271914) internal successors, (3484), 3202 states have internal predecessors, (3484), 1189 states have call successors, (1189), 525 states have call predecessors, (1189), 524 states have return successors, (1186), 1112 states have call predecessors, (1186), 1186 states have call successors, (1186) [2022-03-18 02:34:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4840 states to 4840 states and 5859 transitions. [2022-03-18 02:34:08,651 INFO L78 Accepts]: Start accepts. Automaton has 4840 states and 5859 transitions. Word has length 783 [2022-03-18 02:34:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:08,652 INFO L478 AbstractCegarLoop]: Abstraction has 4840 states and 5859 transitions. [2022-03-18 02:34:08,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (125), 43 states have call predecessors, (125), 41 states have return successors, (123), 41 states have call predecessors, (123), 42 states have call successors, (123) [2022-03-18 02:34:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4840 states and 5859 transitions. [2022-03-18 02:34:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-03-18 02:34:08,661 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:08,662 INFO L500 BasicCegarLoop]: trace histogram [124, 123, 123, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:08,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:08,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:08,879 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 81 times [2022-03-18 02:34:08,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:08,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387954900] [2022-03-18 02:34:08,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1316741486, now seen corresponding path program 82 times [2022-03-18 02:34:08,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:08,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855701208] [2022-03-18 02:34:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:08,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:08,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770423850] [2022-03-18 02:34:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:08,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:08,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:08,895 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:08,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 02:34:09,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:09,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 02:34:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 35342 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-18 02:34:10,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36084 backedges. 246 proven. 5822 refuted. 0 times theorem prover too weak. 30016 trivial. 0 not checked. [2022-03-18 02:34:12,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855701208] [2022-03-18 02:34:12,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770423850] [2022-03-18 02:34:12,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770423850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:12,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:12,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-03-18 02:34:12,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387954900] [2022-03-18 02:34:12,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387954900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:12,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:12,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 02:34:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475134646] [2022-03-18 02:34:12,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:12,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 02:34:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 02:34:12,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 02:34:12,224 INFO L87 Difference]: Start difference. First operand 4840 states and 5859 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-18 02:34:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:14,457 INFO L93 Difference]: Finished difference Result 4974 states and 6032 transitions. [2022-03-18 02:34:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 02:34:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) Word has length 802 [2022-03-18 02:34:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:14,469 INFO L225 Difference]: With dead ends: 4974 [2022-03-18 02:34:14,469 INFO L226 Difference]: Without dead ends: 4965 [2022-03-18 02:34:14,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 02:34:14,472 INFO L912 BasicCegarLoop]: 155 mSDtfsCounter, 124 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:14,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 634 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:34:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-03-18 02:34:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 4963. [2022-03-18 02:34:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 3205 states have (on average 1.1145085803432138) internal successors, (3572), 3283 states have internal predecessors, (3572), 1220 states have call successors, (1220), 538 states have call predecessors, (1220), 537 states have return successors, (1217), 1141 states have call predecessors, (1217), 1217 states have call successors, (1217) [2022-03-18 02:34:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 6009 transitions. [2022-03-18 02:34:15,929 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 6009 transitions. Word has length 802 [2022-03-18 02:34:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:15,930 INFO L478 AbstractCegarLoop]: Abstraction has 4963 states and 6009 transitions. [2022-03-18 02:34:15,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (128), 44 states have call predecessors, (128), 42 states have return successors, (126), 42 states have call predecessors, (126), 43 states have call successors, (126) [2022-03-18 02:34:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 6009 transitions. [2022-03-18 02:34:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2022-03-18 02:34:15,940 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:15,940 INFO L500 BasicCegarLoop]: trace histogram [127, 126, 126, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:15,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:16,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:16,162 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 83 times [2022-03-18 02:34:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [666891816] [2022-03-18 02:34:16,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -530768703, now seen corresponding path program 84 times [2022-03-18 02:34:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669799906] [2022-03-18 02:34:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:16,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294765072] [2022-03-18 02:34:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:16,176 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:16,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 02:34:20,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-03-18 02:34:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 02:34:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 37107 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-03-18 02:34:21,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 37867 backedges. 252 proven. 6111 refuted. 0 times theorem prover too weak. 31504 trivial. 0 not checked. [2022-03-18 02:34:23,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669799906] [2022-03-18 02:34:23,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294765072] [2022-03-18 02:34:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294765072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:23,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:23,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-03-18 02:34:23,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [666891816] [2022-03-18 02:34:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [666891816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:23,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 02:34:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015187288] [2022-03-18 02:34:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:23,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 02:34:23,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 02:34:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 02:34:23,067 INFO L87 Difference]: Start difference. First operand 4963 states and 6009 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-18 02:34:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:25,382 INFO L93 Difference]: Finished difference Result 5097 states and 6182 transitions. [2022-03-18 02:34:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 02:34:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) Word has length 821 [2022-03-18 02:34:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:25,392 INFO L225 Difference]: With dead ends: 5097 [2022-03-18 02:34:25,392 INFO L226 Difference]: Without dead ends: 5088 [2022-03-18 02:34:25,394 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1553 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 02:34:25,394 INFO L912 BasicCegarLoop]: 158 mSDtfsCounter, 130 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:25,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 646 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2022-03-18 02:34:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 5086. [2022-03-18 02:34:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 3284 states have (on average 1.1144945188794153) internal successors, (3660), 3364 states have internal predecessors, (3660), 1251 states have call successors, (1251), 551 states have call predecessors, (1251), 550 states have return successors, (1248), 1170 states have call predecessors, (1248), 1248 states have call successors, (1248) [2022-03-18 02:34:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 6159 transitions. [2022-03-18 02:34:26,862 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 6159 transitions. Word has length 821 [2022-03-18 02:34:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:26,863 INFO L478 AbstractCegarLoop]: Abstraction has 5086 states and 6159 transitions. [2022-03-18 02:34:26,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (131), 45 states have call predecessors, (131), 43 states have return successors, (129), 43 states have call predecessors, (129), 44 states have call successors, (129) [2022-03-18 02:34:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 6159 transitions. [2022-03-18 02:34:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-03-18 02:34:26,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:26,874 INFO L500 BasicCegarLoop]: trace histogram [130, 129, 129, 44, 43, 43, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:26,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:27,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-18 02:34:27,087 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 85 times [2022-03-18 02:34:27,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741203714] [2022-03-18 02:34:27,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -336741838, now seen corresponding path program 86 times [2022-03-18 02:34:27,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047695779] [2022-03-18 02:34:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:27,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:27,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329092038] [2022-03-18 02:34:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:34:27,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:27,101 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:27,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 02:34:27,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:34:27,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 02:34:27,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 38915 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-03-18 02:34:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39693 backedges. 258 proven. 6407 refuted. 0 times theorem prover too weak. 33028 trivial. 0 not checked. [2022-03-18 02:34:30,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047695779] [2022-03-18 02:34:30,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329092038] [2022-03-18 02:34:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329092038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:30,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:30,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-03-18 02:34:30,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:30,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741203714] [2022-03-18 02:34:30,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741203714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:30,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:30,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 02:34:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006845204] [2022-03-18 02:34:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:30,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 02:34:30,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 02:34:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 02:34:30,273 INFO L87 Difference]: Start difference. First operand 5086 states and 6159 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-18 02:34:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:32,806 INFO L93 Difference]: Finished difference Result 5220 states and 6332 transitions. [2022-03-18 02:34:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 02:34:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) Word has length 840 [2022-03-18 02:34:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:32,816 INFO L225 Difference]: With dead ends: 5220 [2022-03-18 02:34:32,816 INFO L226 Difference]: Without dead ends: 5211 [2022-03-18 02:34:32,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1589 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 02:34:32,818 INFO L912 BasicCegarLoop]: 161 mSDtfsCounter, 146 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:32,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 638 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2022-03-18 02:34:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 5209. [2022-03-18 02:34:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 3363 states have (on average 1.1144811180493608) internal successors, (3748), 3445 states have internal predecessors, (3748), 1282 states have call successors, (1282), 564 states have call predecessors, (1282), 563 states have return successors, (1279), 1199 states have call predecessors, (1279), 1279 states have call successors, (1279) [2022-03-18 02:34:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 6309 transitions. [2022-03-18 02:34:34,316 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 6309 transitions. Word has length 840 [2022-03-18 02:34:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:34,316 INFO L478 AbstractCegarLoop]: Abstraction has 5209 states and 6309 transitions. [2022-03-18 02:34:34,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (134), 46 states have call predecessors, (134), 44 states have return successors, (132), 44 states have call predecessors, (132), 45 states have call successors, (132) [2022-03-18 02:34:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 6309 transitions. [2022-03-18 02:34:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-03-18 02:34:34,327 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:34,327 INFO L500 BasicCegarLoop]: trace histogram [133, 132, 132, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:34,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:34,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:34,546 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 87 times [2022-03-18 02:34:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:34,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475323786] [2022-03-18 02:34:34,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 356883745, now seen corresponding path program 88 times [2022-03-18 02:34:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:34,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424095464] [2022-03-18 02:34:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:34,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:34,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665124934] [2022-03-18 02:34:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:34:34,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:34,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:34,563 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:34,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 02:34:34,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:34:34,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:34:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 02:34:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:34:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 40766 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-03-18 02:34:36,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:34:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41562 backedges. 264 proven. 6710 refuted. 0 times theorem prover too weak. 34588 trivial. 0 not checked. [2022-03-18 02:34:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:34:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424095464] [2022-03-18 02:34:38,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:34:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665124934] [2022-03-18 02:34:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665124934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:34:38,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:34:38,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-03-18 02:34:38,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:34:38,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475323786] [2022-03-18 02:34:38,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475323786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:34:38,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:34:38,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 02:34:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343079253] [2022-03-18 02:34:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:34:38,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 02:34:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 02:34:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 02:34:38,689 INFO L87 Difference]: Start difference. First operand 5209 states and 6309 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-18 02:34:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:34:41,129 INFO L93 Difference]: Finished difference Result 5343 states and 6482 transitions. [2022-03-18 02:34:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 02:34:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) Word has length 859 [2022-03-18 02:34:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:34:41,139 INFO L225 Difference]: With dead ends: 5343 [2022-03-18 02:34:41,139 INFO L226 Difference]: Without dead ends: 5334 [2022-03-18 02:34:41,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1625 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 02:34:41,141 INFO L912 BasicCegarLoop]: 164 mSDtfsCounter, 196 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:34:41,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 640 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:34:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2022-03-18 02:34:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2022-03-18 02:34:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 3442 states have (on average 1.114468332364904) internal successors, (3836), 3526 states have internal predecessors, (3836), 1313 states have call successors, (1313), 577 states have call predecessors, (1313), 576 states have return successors, (1310), 1228 states have call predecessors, (1310), 1310 states have call successors, (1310) [2022-03-18 02:34:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 6459 transitions. [2022-03-18 02:34:42,691 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 6459 transitions. Word has length 859 [2022-03-18 02:34:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:34:42,691 INFO L478 AbstractCegarLoop]: Abstraction has 5332 states and 6459 transitions. [2022-03-18 02:34:42,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (137), 47 states have call predecessors, (137), 45 states have return successors, (135), 45 states have call predecessors, (135), 46 states have call successors, (135) [2022-03-18 02:34:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 6459 transitions. [2022-03-18 02:34:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-03-18 02:34:42,701 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:34:42,701 INFO L500 BasicCegarLoop]: trace histogram [136, 135, 135, 46, 45, 45, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:34:42,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 02:34:42,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:42,915 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:34:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:34:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 89 times [2022-03-18 02:34:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:34:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180579259] [2022-03-18 02:34:42,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:34:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1172676050, now seen corresponding path program 90 times [2022-03-18 02:34:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:34:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564591569] [2022-03-18 02:34:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:34:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:34:42,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:34:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947188947] [2022-03-18 02:34:42,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:34:42,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:34:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:34:42,930 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:34:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 02:35:15,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-03-18 02:35:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 02:35:15,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 42660 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 02:35:16,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43474 backedges. 270 proven. 7020 refuted. 0 times theorem prover too weak. 36184 trivial. 0 not checked. [2022-03-18 02:35:19,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564591569] [2022-03-18 02:35:19,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947188947] [2022-03-18 02:35:19,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947188947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:19,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:19,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-03-18 02:35:19,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180579259] [2022-03-18 02:35:19,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180579259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:19,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:19,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 02:35:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715649927] [2022-03-18 02:35:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:19,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 02:35:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 02:35:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 02:35:19,836 INFO L87 Difference]: Start difference. First operand 5332 states and 6459 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-18 02:35:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:22,462 INFO L93 Difference]: Finished difference Result 5466 states and 6632 transitions. [2022-03-18 02:35:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 02:35:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) Word has length 878 [2022-03-18 02:35:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:22,473 INFO L225 Difference]: With dead ends: 5466 [2022-03-18 02:35:22,473 INFO L226 Difference]: Without dead ends: 5457 [2022-03-18 02:35:22,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1800 GetRequests, 1661 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 02:35:22,475 INFO L912 BasicCegarLoop]: 167 mSDtfsCounter, 164 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:22,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 712 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:35:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2022-03-18 02:35:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 5455. [2022-03-18 02:35:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 3521 states have (on average 1.1144561204203352) internal successors, (3924), 3607 states have internal predecessors, (3924), 1344 states have call successors, (1344), 590 states have call predecessors, (1344), 589 states have return successors, (1341), 1257 states have call predecessors, (1341), 1341 states have call successors, (1341) [2022-03-18 02:35:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 6609 transitions. [2022-03-18 02:35:24,090 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 6609 transitions. Word has length 878 [2022-03-18 02:35:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:24,090 INFO L478 AbstractCegarLoop]: Abstraction has 5455 states and 6609 transitions. [2022-03-18 02:35:24,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (140), 48 states have call predecessors, (140), 46 states have return successors, (138), 46 states have call predecessors, (138), 47 states have call successors, (138) [2022-03-18 02:35:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 6609 transitions. [2022-03-18 02:35:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-03-18 02:35:24,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:24,104 INFO L500 BasicCegarLoop]: trace histogram [139, 138, 138, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:24,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:24,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-18 02:35:24,316 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 91 times [2022-03-18 02:35:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201123081] [2022-03-18 02:35:24,317 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 942331265, now seen corresponding path program 92 times [2022-03-18 02:35:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540096553] [2022-03-18 02:35:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:24,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:24,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821685216] [2022-03-18 02:35:24,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:35:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:24,338 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:24,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 02:35:24,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:35:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 02:35:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 44597 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-18 02:35:25,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45429 backedges. 276 proven. 7337 refuted. 0 times theorem prover too weak. 37816 trivial. 0 not checked. [2022-03-18 02:35:28,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540096553] [2022-03-18 02:35:28,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821685216] [2022-03-18 02:35:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821685216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:28,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-18 02:35:28,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201123081] [2022-03-18 02:35:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201123081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:28,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 02:35:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675215075] [2022-03-18 02:35:28,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:28,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 02:35:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 02:35:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 02:35:28,279 INFO L87 Difference]: Start difference. First operand 5455 states and 6609 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-18 02:35:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:30,981 INFO L93 Difference]: Finished difference Result 5589 states and 6782 transitions. [2022-03-18 02:35:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 02:35:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) Word has length 897 [2022-03-18 02:35:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:30,991 INFO L225 Difference]: With dead ends: 5589 [2022-03-18 02:35:30,991 INFO L226 Difference]: Without dead ends: 5580 [2022-03-18 02:35:30,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1697 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-03-18 02:35:30,993 INFO L912 BasicCegarLoop]: 170 mSDtfsCounter, 159 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:30,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 694 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:35:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2022-03-18 02:35:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 5578. [2022-03-18 02:35:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 3600 states have (on average 1.1144444444444443) internal successors, (4012), 3688 states have internal predecessors, (4012), 1375 states have call successors, (1375), 603 states have call predecessors, (1375), 602 states have return successors, (1372), 1286 states have call predecessors, (1372), 1372 states have call successors, (1372) [2022-03-18 02:35:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 6759 transitions. [2022-03-18 02:35:32,610 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 6759 transitions. Word has length 897 [2022-03-18 02:35:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:32,611 INFO L478 AbstractCegarLoop]: Abstraction has 5578 states and 6759 transitions. [2022-03-18 02:35:32,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (143), 49 states have call predecessors, (143), 47 states have return successors, (141), 47 states have call predecessors, (141), 48 states have call successors, (141) [2022-03-18 02:35:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 6759 transitions. [2022-03-18 02:35:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2022-03-18 02:35:32,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:32,622 INFO L500 BasicCegarLoop]: trace histogram [142, 141, 141, 48, 47, 47, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:32,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:32,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-18 02:35:32,834 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 93 times [2022-03-18 02:35:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:32,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989816041] [2022-03-18 02:35:32,835 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash -361379470, now seen corresponding path program 94 times [2022-03-18 02:35:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437584677] [2022-03-18 02:35:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:32,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594708043] [2022-03-18 02:35:32,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:35:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:32,864 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:32,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 02:35:33,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:35:33,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 02:35:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 46577 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-03-18 02:35:34,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 47427 backedges. 282 proven. 7661 refuted. 0 times theorem prover too weak. 39484 trivial. 0 not checked. [2022-03-18 02:35:36,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437584677] [2022-03-18 02:35:36,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594708043] [2022-03-18 02:35:36,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594708043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:36,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:36,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-03-18 02:35:36,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989816041] [2022-03-18 02:35:36,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989816041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:36,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:36,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 02:35:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980123860] [2022-03-18 02:35:36,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:36,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 02:35:36,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 02:35:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 02:35:36,696 INFO L87 Difference]: Start difference. First operand 5578 states and 6759 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-18 02:35:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:39,421 INFO L93 Difference]: Finished difference Result 5712 states and 6932 transitions. [2022-03-18 02:35:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 02:35:39,422 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) Word has length 916 [2022-03-18 02:35:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:39,431 INFO L225 Difference]: With dead ends: 5712 [2022-03-18 02:35:39,432 INFO L226 Difference]: Without dead ends: 5703 [2022-03-18 02:35:39,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1733 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 02:35:39,433 INFO L912 BasicCegarLoop]: 173 mSDtfsCounter, 184 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:39,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 676 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:35:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-03-18 02:35:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5701. [2022-03-18 02:35:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 3679 states have (on average 1.1144332699103017) internal successors, (4100), 3769 states have internal predecessors, (4100), 1406 states have call successors, (1406), 616 states have call predecessors, (1406), 615 states have return successors, (1403), 1315 states have call predecessors, (1403), 1403 states have call successors, (1403) [2022-03-18 02:35:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 6909 transitions. [2022-03-18 02:35:41,065 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 6909 transitions. Word has length 916 [2022-03-18 02:35:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:41,066 INFO L478 AbstractCegarLoop]: Abstraction has 5701 states and 6909 transitions. [2022-03-18 02:35:41,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (146), 50 states have call predecessors, (146), 48 states have return successors, (144), 48 states have call predecessors, (144), 49 states have call successors, (144) [2022-03-18 02:35:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 6909 transitions. [2022-03-18 02:35:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-03-18 02:35:41,077 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:41,077 INFO L500 BasicCegarLoop]: trace histogram [145, 144, 144, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:41,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 02:35:41,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:41,297 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 95 times [2022-03-18 02:35:41,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:41,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335105830] [2022-03-18 02:35:41,298 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1648179743, now seen corresponding path program 96 times [2022-03-18 02:35:41,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:41,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126781323] [2022-03-18 02:35:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:41,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:41,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123926832] [2022-03-18 02:35:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:35:41,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:41,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:41,317 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:41,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 02:35:43,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-18 02:35:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:43,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 02:35:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 48600 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-03-18 02:35:44,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49468 backedges. 288 proven. 7992 refuted. 0 times theorem prover too weak. 41188 trivial. 0 not checked. [2022-03-18 02:35:46,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:46,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126781323] [2022-03-18 02:35:46,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123926832] [2022-03-18 02:35:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123926832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:46,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:46,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2022-03-18 02:35:46,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335105830] [2022-03-18 02:35:46,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335105830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:46,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:46,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 02:35:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394842030] [2022-03-18 02:35:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:46,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 02:35:46,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 02:35:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 02:35:46,656 INFO L87 Difference]: Start difference. First operand 5701 states and 6909 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-18 02:35:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:49,420 INFO L93 Difference]: Finished difference Result 5835 states and 7082 transitions. [2022-03-18 02:35:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 02:35:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) Word has length 935 [2022-03-18 02:35:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:49,432 INFO L225 Difference]: With dead ends: 5835 [2022-03-18 02:35:49,433 INFO L226 Difference]: Without dead ends: 5826 [2022-03-18 02:35:49,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1769 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9803, Invalid=12547, Unknown=0, NotChecked=0, Total=22350 [2022-03-18 02:35:49,435 INFO L912 BasicCegarLoop]: 176 mSDtfsCounter, 208 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:49,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 668 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:35:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2022-03-18 02:35:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5824. [2022-03-18 02:35:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5824 states, 3758 states have (on average 1.1144225651942523) internal successors, (4188), 3850 states have internal predecessors, (4188), 1437 states have call successors, (1437), 629 states have call predecessors, (1437), 628 states have return successors, (1434), 1344 states have call predecessors, (1434), 1434 states have call successors, (1434) [2022-03-18 02:35:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5824 states to 5824 states and 7059 transitions. [2022-03-18 02:35:51,178 INFO L78 Accepts]: Start accepts. Automaton has 5824 states and 7059 transitions. Word has length 935 [2022-03-18 02:35:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:51,179 INFO L478 AbstractCegarLoop]: Abstraction has 5824 states and 7059 transitions. [2022-03-18 02:35:51,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (149), 51 states have call predecessors, (149), 49 states have return successors, (147), 49 states have call predecessors, (147), 50 states have call successors, (147) [2022-03-18 02:35:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5824 states and 7059 transitions. [2022-03-18 02:35:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-03-18 02:35:51,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:51,192 INFO L500 BasicCegarLoop]: trace histogram [148, 147, 147, 50, 49, 49, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:51,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-18 02:35:51,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:51,402 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 97 times [2022-03-18 02:35:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668115624] [2022-03-18 02:35:51,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1831353618, now seen corresponding path program 98 times [2022-03-18 02:35:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:51,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022227886] [2022-03-18 02:35:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:51,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241159741] [2022-03-18 02:35:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:35:51,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:51,417 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 02:35:51,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:35:51,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:35:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 02:35:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:35:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 50666 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-18 02:35:53,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:35:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51552 backedges. 294 proven. 8330 refuted. 0 times theorem prover too weak. 42928 trivial. 0 not checked. [2022-03-18 02:35:55,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:35:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022227886] [2022-03-18 02:35:55,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:35:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241159741] [2022-03-18 02:35:55,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241159741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:35:55,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:35:55,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2022-03-18 02:35:55,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:35:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668115624] [2022-03-18 02:35:55,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668115624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:35:55,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:35:55,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 02:35:55,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905935004] [2022-03-18 02:35:55,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:35:55,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 02:35:55,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 02:35:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:35:55,076 INFO L87 Difference]: Start difference. First operand 5824 states and 7059 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-18 02:35:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:35:57,942 INFO L93 Difference]: Finished difference Result 5958 states and 7232 transitions. [2022-03-18 02:35:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 02:35:57,942 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) Word has length 954 [2022-03-18 02:35:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:35:57,953 INFO L225 Difference]: With dead ends: 5958 [2022-03-18 02:35:57,954 INFO L226 Difference]: Without dead ends: 5949 [2022-03-18 02:35:57,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1805 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=10203, Invalid=13053, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 02:35:57,956 INFO L912 BasicCegarLoop]: 179 mSDtfsCounter, 174 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:35:57,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 720 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:35:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5949 states. [2022-03-18 02:35:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5949 to 5947. [2022-03-18 02:35:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 3837 states have (on average 1.1144123012770393) internal successors, (4276), 3931 states have internal predecessors, (4276), 1468 states have call successors, (1468), 642 states have call predecessors, (1468), 641 states have return successors, (1465), 1373 states have call predecessors, (1465), 1465 states have call successors, (1465) [2022-03-18 02:35:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 7209 transitions. [2022-03-18 02:35:59,731 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 7209 transitions. Word has length 954 [2022-03-18 02:35:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:35:59,732 INFO L478 AbstractCegarLoop]: Abstraction has 5947 states and 7209 transitions. [2022-03-18 02:35:59,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (152), 52 states have call predecessors, (152), 50 states have return successors, (150), 50 states have call predecessors, (150), 51 states have call successors, (150) [2022-03-18 02:35:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 7209 transitions. [2022-03-18 02:35:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2022-03-18 02:35:59,746 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:35:59,747 INFO L500 BasicCegarLoop]: trace histogram [151, 150, 150, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:35:59,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-18 02:35:59,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:59,969 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:35:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:35:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 99 times [2022-03-18 02:35:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:35:59,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450140979] [2022-03-18 02:35:59,970 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:35:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1648586305, now seen corresponding path program 100 times [2022-03-18 02:35:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:35:59,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296059506] [2022-03-18 02:35:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:35:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:35:59,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:35:59,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535028696] [2022-03-18 02:35:59,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:35:59,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:35:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:35:59,984 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:35:59,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 02:36:00,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:36:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 02:36:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 53679 backedges. 300 proven. 52775 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-03-18 02:36:01,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 53679 backedges. 300 proven. 8675 refuted. 0 times theorem prover too weak. 44704 trivial. 0 not checked. [2022-03-18 02:36:04,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296059506] [2022-03-18 02:36:04,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535028696] [2022-03-18 02:36:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535028696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:04,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:04,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 104 [2022-03-18 02:36:04,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450140979] [2022-03-18 02:36:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450140979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:04,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:04,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 02:36:04,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729531924] [2022-03-18 02:36:04,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:04,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 02:36:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 02:36:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:36:04,012 INFO L87 Difference]: Start difference. First operand 5947 states and 7209 transitions. Second operand has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) [2022-03-18 02:36:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:07,002 INFO L93 Difference]: Finished difference Result 6081 states and 7382 transitions. [2022-03-18 02:36:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 02:36:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) Word has length 973 [2022-03-18 02:36:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:07,016 INFO L225 Difference]: With dead ends: 6081 [2022-03-18 02:36:07,017 INFO L226 Difference]: Without dead ends: 6072 [2022-03-18 02:36:07,019 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1842 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10306, Invalid=13256, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 02:36:07,019 INFO L912 BasicCegarLoop]: 182 mSDtfsCounter, 180 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:07,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 702 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:36:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2022-03-18 02:36:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 6070. [2022-03-18 02:36:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 3916 states have (on average 1.114402451481103) internal successors, (4364), 4012 states have internal predecessors, (4364), 1499 states have call successors, (1499), 655 states have call predecessors, (1499), 654 states have return successors, (1496), 1402 states have call predecessors, (1496), 1496 states have call successors, (1496) [2022-03-18 02:36:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 7359 transitions. [2022-03-18 02:36:08,786 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 7359 transitions. Word has length 973 [2022-03-18 02:36:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:08,786 INFO L478 AbstractCegarLoop]: Abstraction has 6070 states and 7359 transitions. [2022-03-18 02:36:08,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (155), 53 states have call predecessors, (155), 51 states have return successors, (153), 51 states have call predecessors, (153), 52 states have call successors, (153) [2022-03-18 02:36:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 7359 transitions. [2022-03-18 02:36:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2022-03-18 02:36:08,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:08,800 INFO L500 BasicCegarLoop]: trace histogram [154, 153, 153, 52, 51, 51, 51, 51, 51, 51, 51, 51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:08,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:09,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:09,022 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1778841778, now seen corresponding path program 101 times [2022-03-18 02:36:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233091203] [2022-03-18 02:36:09,023 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:09,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1778841778, now seen corresponding path program 102 times [2022-03-18 02:36:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876914696] [2022-03-18 02:36:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:09,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:09,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:09,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122668636] [2022-03-18 02:36:09,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:36:09,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:09,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:09,038 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:09,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 02:36:10,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2022-03-18 02:36:10,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2112 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 02:36:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55849 backedges. 306 proven. 54927 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-18 02:36:12,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55849 backedges. 306 proven. 9027 refuted. 0 times theorem prover too weak. 46516 trivial. 0 not checked. [2022-03-18 02:36:15,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876914696] [2022-03-18 02:36:15,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122668636] [2022-03-18 02:36:15,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122668636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:15,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:15,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 104 [2022-03-18 02:36:15,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:15,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233091203] [2022-03-18 02:36:15,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233091203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:15,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:15,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 02:36:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246765547] [2022-03-18 02:36:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:15,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 02:36:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 02:36:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:36:15,079 INFO L87 Difference]: Start difference. First operand 6070 states and 7359 transitions. Second operand has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) [2022-03-18 02:36:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:18,386 INFO L93 Difference]: Finished difference Result 6204 states and 7532 transitions. [2022-03-18 02:36:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 02:36:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) Word has length 992 [2022-03-18 02:36:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:18,403 INFO L225 Difference]: With dead ends: 6204 [2022-03-18 02:36:18,404 INFO L226 Difference]: Without dead ends: 6195 [2022-03-18 02:36:18,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2034 GetRequests, 1880 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10409, Invalid=13461, Unknown=0, NotChecked=0, Total=23870 [2022-03-18 02:36:18,406 INFO L912 BasicCegarLoop]: 185 mSDtfsCounter, 231 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:18,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 754 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:36:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2022-03-18 02:36:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 6193. [2022-03-18 02:36:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 3995 states have (on average 1.114392991239049) internal successors, (4452), 4093 states have internal predecessors, (4452), 1530 states have call successors, (1530), 668 states have call predecessors, (1530), 667 states have return successors, (1527), 1431 states have call predecessors, (1527), 1527 states have call successors, (1527) [2022-03-18 02:36:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 7509 transitions. [2022-03-18 02:36:20,210 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 7509 transitions. Word has length 992 [2022-03-18 02:36:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:20,211 INFO L478 AbstractCegarLoop]: Abstraction has 6193 states and 7509 transitions. [2022-03-18 02:36:20,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (158), 54 states have call predecessors, (158), 52 states have return successors, (156), 52 states have call predecessors, (156), 53 states have call successors, (156) [2022-03-18 02:36:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 7509 transitions. [2022-03-18 02:36:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-03-18 02:36:20,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:20,225 INFO L500 BasicCegarLoop]: trace histogram [157, 156, 156, 53, 52, 52, 52, 52, 52, 52, 52, 52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:20,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:20,442 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:20,442 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:20,442 INFO L85 PathProgramCache]: Analyzing trace with hash -916271455, now seen corresponding path program 103 times [2022-03-18 02:36:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397676756] [2022-03-18 02:36:20,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -916271455, now seen corresponding path program 104 times [2022-03-18 02:36:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:20,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516223012] [2022-03-18 02:36:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:20,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:20,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234338155] [2022-03-18 02:36:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:36:20,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:20,459 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 02:36:20,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:36:20,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 02:36:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 58062 backedges. 312 proven. 57122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-03-18 02:36:22,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 58062 backedges. 312 proven. 9386 refuted. 0 times theorem prover too weak. 48364 trivial. 0 not checked. [2022-03-18 02:36:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516223012] [2022-03-18 02:36:24,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234338155] [2022-03-18 02:36:24,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234338155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:24,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:24,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 104 [2022-03-18 02:36:24,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397676756] [2022-03-18 02:36:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397676756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:24,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:24,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 02:36:24,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393352063] [2022-03-18 02:36:24,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:24,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 02:36:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 02:36:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:36:24,606 INFO L87 Difference]: Start difference. First operand 6193 states and 7509 transitions. Second operand has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) [2022-03-18 02:36:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:27,869 INFO L93 Difference]: Finished difference Result 6327 states and 7682 transitions. [2022-03-18 02:36:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 02:36:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) Word has length 1011 [2022-03-18 02:36:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:27,883 INFO L225 Difference]: With dead ends: 6327 [2022-03-18 02:36:27,883 INFO L226 Difference]: Without dead ends: 6318 [2022-03-18 02:36:27,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 1918 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10512, Invalid=13668, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 02:36:27,885 INFO L912 BasicCegarLoop]: 188 mSDtfsCounter, 232 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:27,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 736 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:36:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2022-03-18 02:36:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 6316. [2022-03-18 02:36:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 4074 states have (on average 1.1143838978890526) internal successors, (4540), 4174 states have internal predecessors, (4540), 1561 states have call successors, (1561), 681 states have call predecessors, (1561), 680 states have return successors, (1558), 1460 states have call predecessors, (1558), 1558 states have call successors, (1558) [2022-03-18 02:36:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 7659 transitions. [2022-03-18 02:36:29,820 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 7659 transitions. Word has length 1011 [2022-03-18 02:36:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:29,821 INFO L478 AbstractCegarLoop]: Abstraction has 6316 states and 7659 transitions. [2022-03-18 02:36:29,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (161), 55 states have call predecessors, (161), 53 states have return successors, (159), 53 states have call predecessors, (159), 54 states have call successors, (159) [2022-03-18 02:36:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 7659 transitions. [2022-03-18 02:36:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2022-03-18 02:36:29,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:29,834 INFO L500 BasicCegarLoop]: trace histogram [160, 159, 159, 54, 53, 53, 53, 53, 53, 53, 53, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:29,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:30,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-18 02:36:30,051 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 630979666, now seen corresponding path program 105 times [2022-03-18 02:36:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:30,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [896161421] [2022-03-18 02:36:30,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 630979666, now seen corresponding path program 106 times [2022-03-18 02:36:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:30,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141817618] [2022-03-18 02:36:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:30,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:30,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706446781] [2022-03-18 02:36:30,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:36:30,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:30,069 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:30,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 02:36:30,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:36:30,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 2219 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 02:36:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 60318 backedges. 318 proven. 59360 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-03-18 02:36:31,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:36:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 60318 backedges. 318 proven. 9752 refuted. 0 times theorem prover too weak. 50248 trivial. 0 not checked. [2022-03-18 02:36:34,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:36:34,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141817618] [2022-03-18 02:36:34,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:36:34,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706446781] [2022-03-18 02:36:34,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706446781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:36:34,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:36:34,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 104 [2022-03-18 02:36:34,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:36:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [896161421] [2022-03-18 02:36:34,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [896161421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:36:34,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:36:34,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 02:36:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914006882] [2022-03-18 02:36:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:36:34,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 02:36:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 02:36:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:36:34,034 INFO L87 Difference]: Start difference. First operand 6316 states and 7659 transitions. Second operand has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) [2022-03-18 02:36:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:36:37,464 INFO L93 Difference]: Finished difference Result 6450 states and 7832 transitions. [2022-03-18 02:36:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 02:36:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) Word has length 1030 [2022-03-18 02:36:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:36:37,479 INFO L225 Difference]: With dead ends: 6450 [2022-03-18 02:36:37,479 INFO L226 Difference]: Without dead ends: 6441 [2022-03-18 02:36:37,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2112 GetRequests, 1956 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=10615, Invalid=13877, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 02:36:37,482 INFO L912 BasicCegarLoop]: 191 mSDtfsCounter, 259 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:36:37,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 738 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:36:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6441 states. [2022-03-18 02:36:39,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6441 to 6439. [2022-03-18 02:36:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 4153 states have (on average 1.114375150493619) internal successors, (4628), 4255 states have internal predecessors, (4628), 1592 states have call successors, (1592), 694 states have call predecessors, (1592), 693 states have return successors, (1589), 1489 states have call predecessors, (1589), 1589 states have call successors, (1589) [2022-03-18 02:36:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 7809 transitions. [2022-03-18 02:36:39,346 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 7809 transitions. Word has length 1030 [2022-03-18 02:36:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:36:39,346 INFO L478 AbstractCegarLoop]: Abstraction has 6439 states and 7809 transitions. [2022-03-18 02:36:39,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (164), 56 states have call predecessors, (164), 54 states have return successors, (162), 54 states have call predecessors, (162), 55 states have call successors, (162) [2022-03-18 02:36:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 7809 transitions. [2022-03-18 02:36:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2022-03-18 02:36:39,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:36:39,360 INFO L500 BasicCegarLoop]: trace histogram [163, 162, 162, 55, 54, 54, 54, 54, 54, 54, 54, 54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:36:39,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 02:36:39,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:39,564 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:36:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:36:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1638471935, now seen corresponding path program 107 times [2022-03-18 02:36:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:36:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753873692] [2022-03-18 02:36:39,566 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:36:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1638471935, now seen corresponding path program 108 times [2022-03-18 02:36:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:36:39,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15853674] [2022-03-18 02:36:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:36:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:36:39,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:36:39,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712331363] [2022-03-18 02:36:39,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:36:39,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:36:39,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:36:39,594 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:36:39,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 02:36:56,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2022-03-18 02:36:56,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:36:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2250 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 02:36:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:36:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 62617 backedges. 324 proven. 61641 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-03-18 02:36:58,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 62617 backedges. 324 proven. 10125 refuted. 0 times theorem prover too weak. 52168 trivial. 0 not checked. [2022-03-18 02:37:02,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15853674] [2022-03-18 02:37:02,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712331363] [2022-03-18 02:37:02,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712331363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:02,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:02,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 104 [2022-03-18 02:37:02,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753873692] [2022-03-18 02:37:02,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753873692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:02,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:02,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 02:37:02,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004616233] [2022-03-18 02:37:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:02,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 02:37:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 02:37:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:37:02,030 INFO L87 Difference]: Start difference. First operand 6439 states and 7809 transitions. Second operand has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) [2022-03-18 02:37:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:05,229 INFO L93 Difference]: Finished difference Result 6573 states and 7982 transitions. [2022-03-18 02:37:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 02:37:05,230 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) Word has length 1049 [2022-03-18 02:37:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:05,245 INFO L225 Difference]: With dead ends: 6573 [2022-03-18 02:37:05,245 INFO L226 Difference]: Without dead ends: 6564 [2022-03-18 02:37:05,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2151 GetRequests, 1994 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10718, Invalid=14088, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 02:37:05,249 INFO L912 BasicCegarLoop]: 194 mSDtfsCounter, 189 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:05,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 770 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 02:37:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2022-03-18 02:37:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6562. [2022-03-18 02:37:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6562 states, 4232 states have (on average 1.114366729678639) internal successors, (4716), 4336 states have internal predecessors, (4716), 1623 states have call successors, (1623), 707 states have call predecessors, (1623), 706 states have return successors, (1620), 1518 states have call predecessors, (1620), 1620 states have call successors, (1620) [2022-03-18 02:37:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6562 states to 6562 states and 7959 transitions. [2022-03-18 02:37:07,240 INFO L78 Accepts]: Start accepts. Automaton has 6562 states and 7959 transitions. Word has length 1049 [2022-03-18 02:37:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:07,241 INFO L478 AbstractCegarLoop]: Abstraction has 6562 states and 7959 transitions. [2022-03-18 02:37:07,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (167), 57 states have call predecessors, (167), 55 states have return successors, (165), 55 states have call predecessors, (165), 56 states have call successors, (165) [2022-03-18 02:37:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6562 states and 7959 transitions. [2022-03-18 02:37:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2022-03-18 02:37:07,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:07,257 INFO L500 BasicCegarLoop]: trace histogram [166, 165, 165, 56, 55, 55, 55, 55, 55, 55, 55, 55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:07,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:07,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:07,470 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash 754010098, now seen corresponding path program 109 times [2022-03-18 02:37:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:07,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222462591] [2022-03-18 02:37:07,471 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 754010098, now seen corresponding path program 110 times [2022-03-18 02:37:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:07,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434363049] [2022-03-18 02:37:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:07,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:07,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851890638] [2022-03-18 02:37:07,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:37:07,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:07,487 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:07,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 02:37:07,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:37:07,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:07,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 02:37:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64959 backedges. 330 proven. 63965 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-03-18 02:37:10,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64959 backedges. 330 proven. 10505 refuted. 0 times theorem prover too weak. 54124 trivial. 0 not checked. [2022-03-18 02:37:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434363049] [2022-03-18 02:37:12,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851890638] [2022-03-18 02:37:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851890638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:12,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 104 [2022-03-18 02:37:12,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222462591] [2022-03-18 02:37:12,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222462591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:12,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 02:37:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517705624] [2022-03-18 02:37:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:12,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 02:37:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 02:37:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:37:12,868 INFO L87 Difference]: Start difference. First operand 6562 states and 7959 transitions. Second operand has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) [2022-03-18 02:37:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:16,267 INFO L93 Difference]: Finished difference Result 6696 states and 8132 transitions. [2022-03-18 02:37:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 02:37:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) Word has length 1068 [2022-03-18 02:37:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:16,284 INFO L225 Difference]: With dead ends: 6696 [2022-03-18 02:37:16,284 INFO L226 Difference]: Without dead ends: 6687 [2022-03-18 02:37:16,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2190 GetRequests, 2032 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10821, Invalid=14301, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 02:37:16,287 INFO L912 BasicCegarLoop]: 197 mSDtfsCounter, 216 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:16,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 792 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:37:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2022-03-18 02:37:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 6685. [2022-03-18 02:37:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6685 states, 4311 states have (on average 1.1143586174901414) internal successors, (4804), 4417 states have internal predecessors, (4804), 1654 states have call successors, (1654), 720 states have call predecessors, (1654), 719 states have return successors, (1651), 1547 states have call predecessors, (1651), 1651 states have call successors, (1651) [2022-03-18 02:37:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 8109 transitions. [2022-03-18 02:37:18,320 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 8109 transitions. Word has length 1068 [2022-03-18 02:37:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:18,321 INFO L478 AbstractCegarLoop]: Abstraction has 6685 states and 8109 transitions. [2022-03-18 02:37:18,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (170), 58 states have call predecessors, (170), 56 states have return successors, (168), 56 states have call predecessors, (168), 57 states have call successors, (168) [2022-03-18 02:37:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 8109 transitions. [2022-03-18 02:37:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2022-03-18 02:37:18,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:18,337 INFO L500 BasicCegarLoop]: trace histogram [169, 168, 168, 57, 56, 56, 56, 56, 56, 56, 56, 56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:18,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:18,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:18,558 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1814710431, now seen corresponding path program 111 times [2022-03-18 02:37:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:18,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1346556880] [2022-03-18 02:37:18,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1814710431, now seen corresponding path program 112 times [2022-03-18 02:37:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261668089] [2022-03-18 02:37:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:18,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075041924] [2022-03-18 02:37:18,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:37:18,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:18,574 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:18,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 02:37:18,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:37:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2339 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-18 02:37:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 67344 backedges. 336 proven. 66332 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-18 02:37:21,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 67344 backedges. 336 proven. 10892 refuted. 0 times theorem prover too weak. 56116 trivial. 0 not checked. [2022-03-18 02:37:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261668089] [2022-03-18 02:37:23,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075041924] [2022-03-18 02:37:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075041924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:23,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:23,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 104 [2022-03-18 02:37:23,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:23,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1346556880] [2022-03-18 02:37:23,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1346556880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:23,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:23,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 02:37:23,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984121333] [2022-03-18 02:37:23,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:23,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 02:37:23,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 02:37:23,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:37:23,100 INFO L87 Difference]: Start difference. First operand 6685 states and 8109 transitions. Second operand has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) [2022-03-18 02:37:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:26,654 INFO L93 Difference]: Finished difference Result 6819 states and 8282 transitions. [2022-03-18 02:37:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 02:37:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) Word has length 1087 [2022-03-18 02:37:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:26,666 INFO L225 Difference]: With dead ends: 6819 [2022-03-18 02:37:26,667 INFO L226 Difference]: Without dead ends: 6810 [2022-03-18 02:37:26,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 2070 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10924, Invalid=14516, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 02:37:26,669 INFO L912 BasicCegarLoop]: 200 mSDtfsCounter, 224 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:26,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 834 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:37:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2022-03-18 02:37:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 6808. [2022-03-18 02:37:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 4390 states have (on average 1.1143507972665148) internal successors, (4892), 4498 states have internal predecessors, (4892), 1685 states have call successors, (1685), 733 states have call predecessors, (1685), 732 states have return successors, (1682), 1576 states have call predecessors, (1682), 1682 states have call successors, (1682) [2022-03-18 02:37:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 8259 transitions. [2022-03-18 02:37:28,703 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 8259 transitions. Word has length 1087 [2022-03-18 02:37:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:28,706 INFO L478 AbstractCegarLoop]: Abstraction has 6808 states and 8259 transitions. [2022-03-18 02:37:28,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (173), 59 states have call predecessors, (173), 57 states have return successors, (171), 57 states have call predecessors, (171), 58 states have call successors, (171) [2022-03-18 02:37:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 8259 transitions. [2022-03-18 02:37:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2022-03-18 02:37:28,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:28,738 INFO L500 BasicCegarLoop]: trace histogram [172, 171, 171, 58, 57, 57, 57, 57, 57, 57, 57, 57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:28,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-18 02:37:28,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:28,951 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -175055982, now seen corresponding path program 113 times [2022-03-18 02:37:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:28,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613320954] [2022-03-18 02:37:28,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -175055982, now seen corresponding path program 114 times [2022-03-18 02:37:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:28,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65486363] [2022-03-18 02:37:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:28,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:28,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456889360] [2022-03-18 02:37:28,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:37:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:28,967 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:28,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 02:37:34,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2022-03-18 02:37:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-18 02:37:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 69772 backedges. 342 proven. 68742 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-18 02:37:36,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 69772 backedges. 342 proven. 11286 refuted. 0 times theorem prover too weak. 58144 trivial. 0 not checked. [2022-03-18 02:37:38,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:38,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65486363] [2022-03-18 02:37:38,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:38,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456889360] [2022-03-18 02:37:38,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456889360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:38,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:38,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 104 [2022-03-18 02:37:38,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613320954] [2022-03-18 02:37:38,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613320954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:38,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:38,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 02:37:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386667491] [2022-03-18 02:37:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:38,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 02:37:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 02:37:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:37:38,890 INFO L87 Difference]: Start difference. First operand 6808 states and 8259 transitions. Second operand has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) [2022-03-18 02:37:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:42,474 INFO L93 Difference]: Finished difference Result 6942 states and 8432 transitions. [2022-03-18 02:37:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-18 02:37:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) Word has length 1106 [2022-03-18 02:37:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:42,486 INFO L225 Difference]: With dead ends: 6942 [2022-03-18 02:37:42,486 INFO L226 Difference]: Without dead ends: 6933 [2022-03-18 02:37:42,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 2108 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11027, Invalid=14733, Unknown=0, NotChecked=0, Total=25760 [2022-03-18 02:37:42,489 INFO L912 BasicCegarLoop]: 203 mSDtfsCounter, 236 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:42,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 786 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:37:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2022-03-18 02:37:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6931. [2022-03-18 02:37:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6931 states, 4469 states have (on average 1.1143432535242783) internal successors, (4980), 4579 states have internal predecessors, (4980), 1716 states have call successors, (1716), 746 states have call predecessors, (1716), 745 states have return successors, (1713), 1605 states have call predecessors, (1713), 1713 states have call successors, (1713) [2022-03-18 02:37:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 8409 transitions. [2022-03-18 02:37:44,553 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 8409 transitions. Word has length 1106 [2022-03-18 02:37:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:44,553 INFO L478 AbstractCegarLoop]: Abstraction has 6931 states and 8409 transitions. [2022-03-18 02:37:44,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (176), 60 states have call predecessors, (176), 58 states have return successors, (174), 58 states have call predecessors, (174), 59 states have call successors, (174) [2022-03-18 02:37:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 8409 transitions. [2022-03-18 02:37:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2022-03-18 02:37:44,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:44,569 INFO L500 BasicCegarLoop]: trace histogram [175, 174, 174, 59, 58, 58, 58, 58, 58, 58, 58, 58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:44,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:44,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:44,777 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1542111295, now seen corresponding path program 115 times [2022-03-18 02:37:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475943214] [2022-03-18 02:37:44,778 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1542111295, now seen corresponding path program 116 times [2022-03-18 02:37:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:44,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664350715] [2022-03-18 02:37:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:44,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024495275] [2022-03-18 02:37:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:37:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:44,794 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:44,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 02:37:45,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:37:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-18 02:37:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 72243 backedges. 348 proven. 71195 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-03-18 02:37:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:37:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72243 backedges. 348 proven. 11687 refuted. 0 times theorem prover too weak. 60208 trivial. 0 not checked. [2022-03-18 02:37:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:37:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664350715] [2022-03-18 02:37:50,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:37:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024495275] [2022-03-18 02:37:50,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024495275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:37:50,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:37:50,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 104 [2022-03-18 02:37:50,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:37:50,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475943214] [2022-03-18 02:37:50,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475943214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:37:50,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:37:50,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 02:37:50,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852132287] [2022-03-18 02:37:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:37:50,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 02:37:50,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 02:37:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:37:50,285 INFO L87 Difference]: Start difference. First operand 6931 states and 8409 transitions. Second operand has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) [2022-03-18 02:37:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:37:54,143 INFO L93 Difference]: Finished difference Result 7065 states and 8582 transitions. [2022-03-18 02:37:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-18 02:37:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) Word has length 1125 [2022-03-18 02:37:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:37:54,158 INFO L225 Difference]: With dead ends: 7065 [2022-03-18 02:37:54,158 INFO L226 Difference]: Without dead ends: 7056 [2022-03-18 02:37:54,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2307 GetRequests, 2146 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11130, Invalid=14952, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 02:37:54,161 INFO L912 BasicCegarLoop]: 206 mSDtfsCounter, 263 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:37:54,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 798 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:37:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2022-03-18 02:37:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 7054. [2022-03-18 02:37:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 4548 states have (on average 1.1143359718557608) internal successors, (5068), 4660 states have internal predecessors, (5068), 1747 states have call successors, (1747), 759 states have call predecessors, (1747), 758 states have return successors, (1744), 1634 states have call predecessors, (1744), 1744 states have call successors, (1744) [2022-03-18 02:37:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 8559 transitions. [2022-03-18 02:37:56,284 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 8559 transitions. Word has length 1125 [2022-03-18 02:37:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:37:56,285 INFO L478 AbstractCegarLoop]: Abstraction has 7054 states and 8559 transitions. [2022-03-18 02:37:56,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (179), 61 states have call predecessors, (179), 59 states have return successors, (177), 59 states have call predecessors, (177), 60 states have call successors, (177) [2022-03-18 02:37:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 8559 transitions. [2022-03-18 02:37:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2022-03-18 02:37:56,302 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:37:56,302 INFO L500 BasicCegarLoop]: trace histogram [178, 177, 177, 60, 59, 59, 59, 59, 59, 59, 59, 59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:37:56,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-18 02:37:56,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 02:37:56,504 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:37:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:37:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2105849650, now seen corresponding path program 117 times [2022-03-18 02:37:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:37:56,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002219562] [2022-03-18 02:37:56,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:37:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2105849650, now seen corresponding path program 118 times [2022-03-18 02:37:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:37:56,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116323191] [2022-03-18 02:37:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:37:56,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:37:56,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:37:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054670675] [2022-03-18 02:37:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:37:56,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:37:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:37:56,521 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:37:56,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 02:37:56,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:37:56,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:37:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-18 02:37:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:37:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 74757 backedges. 354 proven. 73691 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2022-03-18 02:37:59,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 74757 backedges. 354 proven. 12095 refuted. 0 times theorem prover too weak. 62308 trivial. 0 not checked. [2022-03-18 02:38:01,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116323191] [2022-03-18 02:38:01,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054670675] [2022-03-18 02:38:01,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054670675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:01,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:01,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 104 [2022-03-18 02:38:01,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002219562] [2022-03-18 02:38:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002219562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:01,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:01,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 02:38:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980874236] [2022-03-18 02:38:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:01,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 02:38:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 02:38:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:38:01,312 INFO L87 Difference]: Start difference. First operand 7054 states and 8559 transitions. Second operand has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) [2022-03-18 02:38:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:05,250 INFO L93 Difference]: Finished difference Result 7188 states and 8732 transitions. [2022-03-18 02:38:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-18 02:38:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) Word has length 1144 [2022-03-18 02:38:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:05,263 INFO L225 Difference]: With dead ends: 7188 [2022-03-18 02:38:05,263 INFO L226 Difference]: Without dead ends: 7179 [2022-03-18 02:38:05,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2346 GetRequests, 2184 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11233, Invalid=15173, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 02:38:05,265 INFO L912 BasicCegarLoop]: 209 mSDtfsCounter, 215 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:05,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 840 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:38:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-03-18 02:38:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 7177. [2022-03-18 02:38:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 4627 states have (on average 1.1143289388372595) internal successors, (5156), 4741 states have internal predecessors, (5156), 1778 states have call successors, (1778), 772 states have call predecessors, (1778), 771 states have return successors, (1775), 1663 states have call predecessors, (1775), 1775 states have call successors, (1775) [2022-03-18 02:38:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 8709 transitions. [2022-03-18 02:38:07,391 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 8709 transitions. Word has length 1144 [2022-03-18 02:38:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:07,391 INFO L478 AbstractCegarLoop]: Abstraction has 7177 states and 8709 transitions. [2022-03-18 02:38:07,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (180), 60 states have call predecessors, (180), 61 states have call successors, (180) [2022-03-18 02:38:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 8709 transitions. [2022-03-18 02:38:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1164 [2022-03-18 02:38:07,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:07,407 INFO L500 BasicCegarLoop]: trace histogram [181, 180, 180, 61, 60, 60, 60, 60, 60, 60, 60, 60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:07,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:07,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:07,628 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1892384801, now seen corresponding path program 119 times [2022-03-18 02:38:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589635772] [2022-03-18 02:38:07,629 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1892384801, now seen corresponding path program 120 times [2022-03-18 02:38:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:07,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732244466] [2022-03-18 02:38:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:07,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:07,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413429619] [2022-03-18 02:38:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:07,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:07,645 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 02:38:16,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 117 check-sat command(s) [2022-03-18 02:38:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-18 02:38:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 77314 backedges. 360 proven. 76230 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2022-03-18 02:38:19,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 77314 backedges. 360 proven. 12510 refuted. 0 times theorem prover too weak. 64444 trivial. 0 not checked. [2022-03-18 02:38:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732244466] [2022-03-18 02:38:21,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413429619] [2022-03-18 02:38:21,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413429619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:21,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:21,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 104 [2022-03-18 02:38:21,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589635772] [2022-03-18 02:38:21,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589635772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:21,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:21,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 02:38:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007612606] [2022-03-18 02:38:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:21,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 02:38:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 02:38:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:38:21,342 INFO L87 Difference]: Start difference. First operand 7177 states and 8709 transitions. Second operand has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) [2022-03-18 02:38:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:25,376 INFO L93 Difference]: Finished difference Result 7311 states and 8882 transitions. [2022-03-18 02:38:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-18 02:38:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) Word has length 1163 [2022-03-18 02:38:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:25,389 INFO L225 Difference]: With dead ends: 7311 [2022-03-18 02:38:25,389 INFO L226 Difference]: Without dead ends: 7302 [2022-03-18 02:38:25,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2385 GetRequests, 2222 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11336, Invalid=15396, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 02:38:25,391 INFO L912 BasicCegarLoop]: 212 mSDtfsCounter, 260 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:25,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 812 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:38:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7302 states. [2022-03-18 02:38:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7302 to 7300. [2022-03-18 02:38:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7300 states, 4706 states have (on average 1.1143221419464513) internal successors, (5244), 4822 states have internal predecessors, (5244), 1809 states have call successors, (1809), 785 states have call predecessors, (1809), 784 states have return successors, (1806), 1692 states have call predecessors, (1806), 1806 states have call successors, (1806) [2022-03-18 02:38:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7300 states to 7300 states and 8859 transitions. [2022-03-18 02:38:27,572 INFO L78 Accepts]: Start accepts. Automaton has 7300 states and 8859 transitions. Word has length 1163 [2022-03-18 02:38:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:27,572 INFO L478 AbstractCegarLoop]: Abstraction has 7300 states and 8859 transitions. [2022-03-18 02:38:27,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (185), 63 states have call predecessors, (185), 61 states have return successors, (183), 61 states have call predecessors, (183), 62 states have call successors, (183) [2022-03-18 02:38:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7300 states and 8859 transitions. [2022-03-18 02:38:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2022-03-18 02:38:27,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:27,589 INFO L500 BasicCegarLoop]: trace histogram [184, 183, 183, 62, 61, 61, 61, 61, 61, 61, 61, 61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:27,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:27,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:27,796 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash -346629422, now seen corresponding path program 121 times [2022-03-18 02:38:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:27,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616795663] [2022-03-18 02:38:27,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -346629422, now seen corresponding path program 122 times [2022-03-18 02:38:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:27,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845751282] [2022-03-18 02:38:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:27,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:27,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123476460] [2022-03-18 02:38:27,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:38:27,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:27,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:27,814 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:27,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 02:38:28,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:38:28,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-18 02:38:28,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 79914 backedges. 366 proven. 78812 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-03-18 02:38:30,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 79914 backedges. 366 proven. 12932 refuted. 0 times theorem prover too weak. 66616 trivial. 0 not checked. [2022-03-18 02:38:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:32,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845751282] [2022-03-18 02:38:32,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123476460] [2022-03-18 02:38:32,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123476460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:32,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:32,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 104 [2022-03-18 02:38:32,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616795663] [2022-03-18 02:38:32,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616795663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:32,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:32,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 02:38:32,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785574231] [2022-03-18 02:38:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:32,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 02:38:32,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 02:38:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:38:32,140 INFO L87 Difference]: Start difference. First operand 7300 states and 8859 transitions. Second operand has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) [2022-03-18 02:38:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:35,978 INFO L93 Difference]: Finished difference Result 7434 states and 9032 transitions. [2022-03-18 02:38:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-18 02:38:35,978 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) Word has length 1182 [2022-03-18 02:38:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:35,993 INFO L225 Difference]: With dead ends: 7434 [2022-03-18 02:38:35,993 INFO L226 Difference]: Without dead ends: 7425 [2022-03-18 02:38:35,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2424 GetRequests, 2260 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=11439, Invalid=15621, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 02:38:35,997 INFO L912 BasicCegarLoop]: 215 mSDtfsCounter, 266 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:35,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 864 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:38:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7425 states. [2022-03-18 02:38:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7425 to 7423. [2022-03-18 02:38:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 4785 states have (on average 1.1143155694879834) internal successors, (5332), 4903 states have internal predecessors, (5332), 1840 states have call successors, (1840), 798 states have call predecessors, (1840), 797 states have return successors, (1837), 1721 states have call predecessors, (1837), 1837 states have call successors, (1837) [2022-03-18 02:38:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 9009 transitions. [2022-03-18 02:38:38,241 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 9009 transitions. Word has length 1182 [2022-03-18 02:38:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:38,242 INFO L478 AbstractCegarLoop]: Abstraction has 7423 states and 9009 transitions. [2022-03-18 02:38:38,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (188), 64 states have call predecessors, (188), 62 states have return successors, (186), 62 states have call predecessors, (186), 63 states have call successors, (186) [2022-03-18 02:38:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 9009 transitions. [2022-03-18 02:38:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2022-03-18 02:38:38,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:38,260 INFO L500 BasicCegarLoop]: trace histogram [187, 186, 186, 63, 62, 62, 62, 62, 62, 62, 62, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:38,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:38,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:38,475 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1557235583, now seen corresponding path program 123 times [2022-03-18 02:38:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:38,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564807891] [2022-03-18 02:38:38,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1557235583, now seen corresponding path program 124 times [2022-03-18 02:38:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249115117] [2022-03-18 02:38:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:38,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155393386] [2022-03-18 02:38:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:38:38,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:38,493 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:38,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 02:38:38,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:38:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:38:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2579 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-18 02:38:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:38:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 82557 backedges. 372 proven. 81437 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-03-18 02:38:41,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:38:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 82557 backedges. 372 proven. 13361 refuted. 0 times theorem prover too weak. 68824 trivial. 0 not checked. [2022-03-18 02:38:43,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:38:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249115117] [2022-03-18 02:38:43,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:38:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155393386] [2022-03-18 02:38:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155393386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:38:43,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:38:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 104 [2022-03-18 02:38:43,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:38:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564807891] [2022-03-18 02:38:43,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564807891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:38:43,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:38:43,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 02:38:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089631159] [2022-03-18 02:38:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:38:43,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 02:38:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 02:38:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:38:43,641 INFO L87 Difference]: Start difference. First operand 7423 states and 9009 transitions. Second operand has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) [2022-03-18 02:38:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:38:47,649 INFO L93 Difference]: Finished difference Result 7557 states and 9182 transitions. [2022-03-18 02:38:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-18 02:38:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) Word has length 1201 [2022-03-18 02:38:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:38:47,663 INFO L225 Difference]: With dead ends: 7557 [2022-03-18 02:38:47,664 INFO L226 Difference]: Without dead ends: 7548 [2022-03-18 02:38:47,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2298 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11542, Invalid=15848, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 02:38:47,666 INFO L912 BasicCegarLoop]: 218 mSDtfsCounter, 244 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:38:47,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 856 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:38:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7548 states. [2022-03-18 02:38:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7548 to 7546. [2022-03-18 02:38:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7546 states, 4864 states have (on average 1.1143092105263157) internal successors, (5420), 4984 states have internal predecessors, (5420), 1871 states have call successors, (1871), 811 states have call predecessors, (1871), 810 states have return successors, (1868), 1750 states have call predecessors, (1868), 1868 states have call successors, (1868) [2022-03-18 02:38:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7546 states to 7546 states and 9159 transitions. [2022-03-18 02:38:49,900 INFO L78 Accepts]: Start accepts. Automaton has 7546 states and 9159 transitions. Word has length 1201 [2022-03-18 02:38:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:38:49,901 INFO L478 AbstractCegarLoop]: Abstraction has 7546 states and 9159 transitions. [2022-03-18 02:38:49,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (191), 65 states have call predecessors, (191), 63 states have return successors, (189), 63 states have call predecessors, (189), 64 states have call successors, (189) [2022-03-18 02:38:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7546 states and 9159 transitions. [2022-03-18 02:38:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1221 [2022-03-18 02:38:49,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:38:49,919 INFO L500 BasicCegarLoop]: trace histogram [190, 189, 189, 64, 63, 63, 63, 63, 63, 63, 63, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:38:49,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-18 02:38:50,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:50,127 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:38:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:38:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 772884082, now seen corresponding path program 125 times [2022-03-18 02:38:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:38:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162208919] [2022-03-18 02:38:50,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:38:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 772884082, now seen corresponding path program 126 times [2022-03-18 02:38:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:38:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008422899] [2022-03-18 02:38:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:38:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:38:50,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:38:50,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323571656] [2022-03-18 02:38:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:38:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:38:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:38:50,144 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:38:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 02:39:42,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 120 check-sat command(s) [2022-03-18 02:39:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-18 02:39:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 85243 backedges. 378 proven. 84105 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-18 02:39:45,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 85243 backedges. 378 proven. 13797 refuted. 0 times theorem prover too weak. 71068 trivial. 0 not checked. [2022-03-18 02:39:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008422899] [2022-03-18 02:39:47,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323571656] [2022-03-18 02:39:47,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323571656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:47,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:47,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 104 [2022-03-18 02:39:47,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162208919] [2022-03-18 02:39:47,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162208919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:47,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:47,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 02:39:47,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572386749] [2022-03-18 02:39:47,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:47,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 02:39:47,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 02:39:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:39:47,502 INFO L87 Difference]: Start difference. First operand 7546 states and 9159 transitions. Second operand has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) [2022-03-18 02:39:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:39:51,449 INFO L93 Difference]: Finished difference Result 7680 states and 9332 transitions. [2022-03-18 02:39:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-18 02:39:51,450 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) Word has length 1220 [2022-03-18 02:39:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:39:51,462 INFO L225 Difference]: With dead ends: 7680 [2022-03-18 02:39:51,462 INFO L226 Difference]: Without dead ends: 7671 [2022-03-18 02:39:51,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2502 GetRequests, 2336 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11645, Invalid=16077, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 02:39:51,464 INFO L912 BasicCegarLoop]: 221 mSDtfsCounter, 268 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:39:51,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 858 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:39:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2022-03-18 02:39:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 7669. [2022-03-18 02:39:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7669 states, 4943 states have (on average 1.114303054825005) internal successors, (5508), 5065 states have internal predecessors, (5508), 1902 states have call successors, (1902), 824 states have call predecessors, (1902), 823 states have return successors, (1899), 1779 states have call predecessors, (1899), 1899 states have call successors, (1899) [2022-03-18 02:39:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7669 states to 7669 states and 9309 transitions. [2022-03-18 02:39:53,755 INFO L78 Accepts]: Start accepts. Automaton has 7669 states and 9309 transitions. Word has length 1220 [2022-03-18 02:39:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:39:53,756 INFO L478 AbstractCegarLoop]: Abstraction has 7669 states and 9309 transitions. [2022-03-18 02:39:53,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (192), 64 states have call predecessors, (192), 65 states have call successors, (192) [2022-03-18 02:39:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 7669 states and 9309 transitions. [2022-03-18 02:39:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1240 [2022-03-18 02:39:53,773 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:39:53,773 INFO L500 BasicCegarLoop]: trace histogram [193, 192, 192, 65, 64, 64, 64, 64, 64, 64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:39:53,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 02:39:53,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:53,989 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:39:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:39:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1274292449, now seen corresponding path program 127 times [2022-03-18 02:39:53,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572337598] [2022-03-18 02:39:53,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:39:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1274292449, now seen corresponding path program 128 times [2022-03-18 02:39:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:39:53,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110305227] [2022-03-18 02:39:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:39:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:39:54,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:39:54,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359919249] [2022-03-18 02:39:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:39:54,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:39:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:39:54,006 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:39:54,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 02:39:54,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:39:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:39:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-18 02:39:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:39:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 87972 backedges. 384 proven. 86816 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-03-18 02:39:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:39:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 87972 backedges. 384 proven. 14240 refuted. 0 times theorem prover too weak. 73348 trivial. 0 not checked. [2022-03-18 02:39:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:39:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110305227] [2022-03-18 02:39:59,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:39:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359919249] [2022-03-18 02:39:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359919249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:39:59,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:39:59,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 104 [2022-03-18 02:39:59,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:39:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572337598] [2022-03-18 02:39:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572337598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:39:59,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:39:59,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 02:39:59,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053547740] [2022-03-18 02:39:59,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:39:59,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 02:39:59,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:39:59,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 02:39:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:39:59,308 INFO L87 Difference]: Start difference. First operand 7669 states and 9309 transitions. Second operand has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) [2022-03-18 02:40:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:04,023 INFO L93 Difference]: Finished difference Result 7803 states and 9482 transitions. [2022-03-18 02:40:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-18 02:40:04,023 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) Word has length 1239 [2022-03-18 02:40:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:04,036 INFO L225 Difference]: With dead ends: 7803 [2022-03-18 02:40:04,036 INFO L226 Difference]: Without dead ends: 7794 [2022-03-18 02:40:04,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2541 GetRequests, 2374 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11748, Invalid=16308, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 02:40:04,039 INFO L912 BasicCegarLoop]: 224 mSDtfsCounter, 248 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:04,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 870 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:40:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7794 states. [2022-03-18 02:40:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7794 to 7792. [2022-03-18 02:40:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 5022 states have (on average 1.1142970927917164) internal successors, (5596), 5146 states have internal predecessors, (5596), 1933 states have call successors, (1933), 837 states have call predecessors, (1933), 836 states have return successors, (1930), 1808 states have call predecessors, (1930), 1930 states have call successors, (1930) [2022-03-18 02:40:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 9459 transitions. [2022-03-18 02:40:06,371 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 9459 transitions. Word has length 1239 [2022-03-18 02:40:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:06,372 INFO L478 AbstractCegarLoop]: Abstraction has 7792 states and 9459 transitions. [2022-03-18 02:40:06,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (197), 67 states have call predecessors, (197), 65 states have return successors, (195), 65 states have call predecessors, (195), 66 states have call successors, (195) [2022-03-18 02:40:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 9459 transitions. [2022-03-18 02:40:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2022-03-18 02:40:06,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:06,390 INFO L500 BasicCegarLoop]: trace histogram [196, 195, 195, 66, 65, 65, 65, 65, 65, 65, 65, 65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:06,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:06,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-18 02:40:06,603 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1656882670, now seen corresponding path program 129 times [2022-03-18 02:40:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:06,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273692671] [2022-03-18 02:40:06,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1656882670, now seen corresponding path program 130 times [2022-03-18 02:40:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:06,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969258554] [2022-03-18 02:40:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:06,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414245384] [2022-03-18 02:40:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:40:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:06,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:06,633 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:06,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 02:40:07,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:40:07,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-18 02:40:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90744 backedges. 390 proven. 89570 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-18 02:40:08,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 90744 backedges. 390 proven. 14690 refuted. 0 times theorem prover too weak. 75664 trivial. 0 not checked. [2022-03-18 02:40:10,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969258554] [2022-03-18 02:40:10,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414245384] [2022-03-18 02:40:10,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414245384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:10,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 104 [2022-03-18 02:40:10,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273692671] [2022-03-18 02:40:10,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273692671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:10,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:10,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 02:40:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939819849] [2022-03-18 02:40:10,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:10,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 02:40:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 02:40:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:40:10,851 INFO L87 Difference]: Start difference. First operand 7792 states and 9459 transitions. Second operand has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) [2022-03-18 02:40:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:15,308 INFO L93 Difference]: Finished difference Result 7926 states and 9632 transitions. [2022-03-18 02:40:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-18 02:40:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) Word has length 1258 [2022-03-18 02:40:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:15,322 INFO L225 Difference]: With dead ends: 7926 [2022-03-18 02:40:15,322 INFO L226 Difference]: Without dead ends: 7917 [2022-03-18 02:40:15,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2580 GetRequests, 2412 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11851, Invalid=16541, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 02:40:15,324 INFO L912 BasicCegarLoop]: 227 mSDtfsCounter, 262 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:15,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 882 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:40:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7917 states. [2022-03-18 02:40:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7917 to 7915. [2022-03-18 02:40:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7915 states, 5101 states have (on average 1.1142913154283474) internal successors, (5684), 5227 states have internal predecessors, (5684), 1964 states have call successors, (1964), 850 states have call predecessors, (1964), 849 states have return successors, (1961), 1837 states have call predecessors, (1961), 1961 states have call successors, (1961) [2022-03-18 02:40:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7915 states to 7915 states and 9609 transitions. [2022-03-18 02:40:17,701 INFO L78 Accepts]: Start accepts. Automaton has 7915 states and 9609 transitions. Word has length 1258 [2022-03-18 02:40:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:17,702 INFO L478 AbstractCegarLoop]: Abstraction has 7915 states and 9609 transitions. [2022-03-18 02:40:17,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (200), 68 states have call predecessors, (200), 66 states have return successors, (198), 66 states have call predecessors, (198), 67 states have call successors, (198) [2022-03-18 02:40:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7915 states and 9609 transitions. [2022-03-18 02:40:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2022-03-18 02:40:17,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:17,720 INFO L500 BasicCegarLoop]: trace histogram [199, 198, 198, 67, 66, 66, 66, 66, 66, 66, 66, 66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:17,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:17,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-18 02:40:17,928 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1129484609, now seen corresponding path program 131 times [2022-03-18 02:40:17,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676015033] [2022-03-18 02:40:17,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:17,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1129484609, now seen corresponding path program 132 times [2022-03-18 02:40:17,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:17,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724747505] [2022-03-18 02:40:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:17,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:17,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:17,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48839106] [2022-03-18 02:40:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:40:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:17,961 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:17,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 02:40:46,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2022-03-18 02:40:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:40:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-18 02:40:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:40:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 93559 backedges. 396 proven. 92367 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2022-03-18 02:40:49,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:40:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 93559 backedges. 396 proven. 15147 refuted. 0 times theorem prover too weak. 78016 trivial. 0 not checked. [2022-03-18 02:40:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:40:52,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724747505] [2022-03-18 02:40:52,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:40:52,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48839106] [2022-03-18 02:40:52,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48839106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:40:52,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:40:52,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2022-03-18 02:40:52,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:40:52,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676015033] [2022-03-18 02:40:52,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676015033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:40:52,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:40:52,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 02:40:52,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133119702] [2022-03-18 02:40:52,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:40:52,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 02:40:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 02:40:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:40:52,888 INFO L87 Difference]: Start difference. First operand 7915 states and 9609 transitions. Second operand has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) [2022-03-18 02:40:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:40:57,207 INFO L93 Difference]: Finished difference Result 8049 states and 9782 transitions. [2022-03-18 02:40:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-18 02:40:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) Word has length 1277 [2022-03-18 02:40:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:40:57,220 INFO L225 Difference]: With dead ends: 8049 [2022-03-18 02:40:57,220 INFO L226 Difference]: Without dead ends: 8040 [2022-03-18 02:40:57,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2619 GetRequests, 2450 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11954, Invalid=16776, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 02:40:57,222 INFO L912 BasicCegarLoop]: 230 mSDtfsCounter, 220 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:40:57,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 944 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:40:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8040 states. [2022-03-18 02:40:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8040 to 8038. [2022-03-18 02:40:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8038 states, 5180 states have (on average 1.1142857142857143) internal successors, (5772), 5308 states have internal predecessors, (5772), 1995 states have call successors, (1995), 863 states have call predecessors, (1995), 862 states have return successors, (1992), 1866 states have call predecessors, (1992), 1992 states have call successors, (1992) [2022-03-18 02:40:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8038 states to 8038 states and 9759 transitions. [2022-03-18 02:40:59,662 INFO L78 Accepts]: Start accepts. Automaton has 8038 states and 9759 transitions. Word has length 1277 [2022-03-18 02:40:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:40:59,663 INFO L478 AbstractCegarLoop]: Abstraction has 8038 states and 9759 transitions. [2022-03-18 02:40:59,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (203), 69 states have call predecessors, (203), 67 states have return successors, (201), 67 states have call predecessors, (201), 68 states have call successors, (201) [2022-03-18 02:40:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8038 states and 9759 transitions. [2022-03-18 02:40:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1297 [2022-03-18 02:40:59,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:40:59,680 INFO L500 BasicCegarLoop]: trace histogram [202, 201, 201, 68, 67, 67, 67, 67, 67, 67, 67, 67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:40:59,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 02:40:59,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:59,895 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:40:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:40:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1729694286, now seen corresponding path program 133 times [2022-03-18 02:40:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:40:59,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944616212] [2022-03-18 02:40:59,940 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:40:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1729694286, now seen corresponding path program 134 times [2022-03-18 02:40:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:40:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275861856] [2022-03-18 02:40:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:40:59,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:40:59,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:40:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428964546] [2022-03-18 02:40:59,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:40:59,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:40:59,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:40:59,957 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:40:59,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 02:41:00,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:41:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:00,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-18 02:41:00,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 96417 backedges. 402 proven. 95207 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2022-03-18 02:41:02,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 96417 backedges. 402 proven. 15611 refuted. 0 times theorem prover too weak. 80404 trivial. 0 not checked. [2022-03-18 02:41:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275861856] [2022-03-18 02:41:03,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428964546] [2022-03-18 02:41:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428964546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:41:03,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:41:03,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 104 [2022-03-18 02:41:03,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944616212] [2022-03-18 02:41:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944616212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:03,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:03,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 02:41:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105958763] [2022-03-18 02:41:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:03,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 02:41:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 02:41:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:41:03,998 INFO L87 Difference]: Start difference. First operand 8038 states and 9759 transitions. Second operand has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) [2022-03-18 02:41:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:08,301 INFO L93 Difference]: Finished difference Result 8172 states and 9932 transitions. [2022-03-18 02:41:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-18 02:41:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) Word has length 1296 [2022-03-18 02:41:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:08,315 INFO L225 Difference]: With dead ends: 8172 [2022-03-18 02:41:08,315 INFO L226 Difference]: Without dead ends: 8163 [2022-03-18 02:41:08,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2658 GetRequests, 2488 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=12057, Invalid=17013, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 02:41:08,318 INFO L912 BasicCegarLoop]: 233 mSDtfsCounter, 234 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:08,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 976 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:41:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2022-03-18 02:41:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8161. [2022-03-18 02:41:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 5259 states have (on average 1.1142802814223236) internal successors, (5860), 5389 states have internal predecessors, (5860), 2026 states have call successors, (2026), 876 states have call predecessors, (2026), 875 states have return successors, (2023), 1895 states have call predecessors, (2023), 2023 states have call successors, (2023) [2022-03-18 02:41:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 9909 transitions. [2022-03-18 02:41:10,763 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 9909 transitions. Word has length 1296 [2022-03-18 02:41:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:10,763 INFO L478 AbstractCegarLoop]: Abstraction has 8161 states and 9909 transitions. [2022-03-18 02:41:10,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (206), 70 states have call predecessors, (206), 68 states have return successors, (204), 68 states have call predecessors, (204), 69 states have call successors, (204) [2022-03-18 02:41:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 9909 transitions. [2022-03-18 02:41:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1316 [2022-03-18 02:41:10,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:10,784 INFO L500 BasicCegarLoop]: trace histogram [205, 204, 204, 69, 68, 68, 68, 68, 68, 68, 68, 68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:10,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:11,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:11,003 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:11,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1996508767, now seen corresponding path program 135 times [2022-03-18 02:41:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:11,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483104451] [2022-03-18 02:41:11,007 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1996508767, now seen corresponding path program 136 times [2022-03-18 02:41:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141214269] [2022-03-18 02:41:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:11,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:11,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357019223] [2022-03-18 02:41:11,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:41:11,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:11,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:11,045 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:41:11,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 02:41:11,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:41:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2819 conjuncts, 141 conjunts are in the unsatisfiable core [2022-03-18 02:41:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 99318 backedges. 408 proven. 98090 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-18 02:41:14,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:41:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 99318 backedges. 408 proven. 16082 refuted. 0 times theorem prover too weak. 82828 trivial. 0 not checked. [2022-03-18 02:41:16,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:41:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141214269] [2022-03-18 02:41:16,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:41:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357019223] [2022-03-18 02:41:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357019223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:41:16,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:41:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 104 [2022-03-18 02:41:16,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:41:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483104451] [2022-03-18 02:41:16,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483104451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:41:16,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:41:16,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 02:41:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421651127] [2022-03-18 02:41:16,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:41:16,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 02:41:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 02:41:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:41:16,547 INFO L87 Difference]: Start difference. First operand 8161 states and 9909 transitions. Second operand has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (209), 71 states have call predecessors, (209), 69 states have return successors, (207), 69 states have call predecessors, (207), 70 states have call successors, (207) [2022-03-18 02:41:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:41:21,510 INFO L93 Difference]: Finished difference Result 8295 states and 10082 transitions. [2022-03-18 02:41:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-18 02:41:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (209), 71 states have call predecessors, (209), 69 states have return successors, (207), 69 states have call predecessors, (207), 70 states have call successors, (207) Word has length 1315 [2022-03-18 02:41:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:41:21,528 INFO L225 Difference]: With dead ends: 8295 [2022-03-18 02:41:21,528 INFO L226 Difference]: Without dead ends: 8286 [2022-03-18 02:41:21,532 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2697 GetRequests, 2526 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12160, Invalid=17252, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 02:41:21,532 INFO L912 BasicCegarLoop]: 236 mSDtfsCounter, 258 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:41:21,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 948 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:41:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2022-03-18 02:41:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8284. [2022-03-18 02:41:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 5338 states have (on average 1.1142750093668041) internal successors, (5948), 5470 states have internal predecessors, (5948), 2057 states have call successors, (2057), 889 states have call predecessors, (2057), 888 states have return successors, (2054), 1924 states have call predecessors, (2054), 2054 states have call successors, (2054) [2022-03-18 02:41:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 10059 transitions. [2022-03-18 02:41:24,067 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 10059 transitions. Word has length 1315 [2022-03-18 02:41:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:41:24,068 INFO L478 AbstractCegarLoop]: Abstraction has 8284 states and 10059 transitions. [2022-03-18 02:41:24,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (209), 71 states have call predecessors, (209), 69 states have return successors, (207), 69 states have call predecessors, (207), 70 states have call successors, (207) [2022-03-18 02:41:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 10059 transitions. [2022-03-18 02:41:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1335 [2022-03-18 02:41:24,087 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:41:24,087 INFO L500 BasicCegarLoop]: trace histogram [208, 207, 207, 70, 69, 69, 69, 69, 69, 69, 69, 69, 69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:41:24,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 02:41:24,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-18 02:41:24,296 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:41:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:41:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 697710930, now seen corresponding path program 137 times [2022-03-18 02:41:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:41:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [548233609] [2022-03-18 02:41:24,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:41:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 697710930, now seen corresponding path program 138 times [2022-03-18 02:41:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:41:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807387681] [2022-03-18 02:41:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:41:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:41:24,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:41:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629043421] [2022-03-18 02:41:24,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:41:24,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:41:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:41:24,316 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:41:24,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 02:41:55,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2022-03-18 02:41:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:41:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-18 02:41:55,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:41:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 102262 backedges. 414 proven. 101016 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2022-03-18 02:41:58,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:42:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 102262 backedges. 414 proven. 16560 refuted. 0 times theorem prover too weak. 85288 trivial. 0 not checked. [2022-03-18 02:42:00,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:42:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807387681] [2022-03-18 02:42:00,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:42:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629043421] [2022-03-18 02:42:00,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629043421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:42:00,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:42:00,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 104 [2022-03-18 02:42:00,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:42:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [548233609] [2022-03-18 02:42:00,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [548233609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:42:00,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:42:00,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 02:42:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430659767] [2022-03-18 02:42:00,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:42:00,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 02:42:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:42:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 02:42:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 02:42:00,656 INFO L87 Difference]: Start difference. First operand 8284 states and 10059 transitions. Second operand has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (212), 72 states have call predecessors, (212), 70 states have return successors, (210), 70 states have call predecessors, (210), 71 states have call successors, (210) [2022-03-18 02:42:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:42:05,648 INFO L93 Difference]: Finished difference Result 8418 states and 10232 transitions. [2022-03-18 02:42:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-18 02:42:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (212), 72 states have call predecessors, (212), 70 states have return successors, (210), 70 states have call predecessors, (210), 71 states have call successors, (210) Word has length 1334 [2022-03-18 02:42:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:42:05,665 INFO L225 Difference]: With dead ends: 8418 [2022-03-18 02:42:05,665 INFO L226 Difference]: Without dead ends: 8409 [2022-03-18 02:42:05,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2736 GetRequests, 2564 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12263, Invalid=17493, Unknown=0, NotChecked=0, Total=29756 [2022-03-18 02:42:05,668 INFO L912 BasicCegarLoop]: 239 mSDtfsCounter, 319 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:42:05,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 950 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:42:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8409 states.