/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:15:34,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:15:34,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:15:34,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:15:34,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 03:15:34,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 03:15:34,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 03:15:34,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:15:34,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:15:34,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:15:34,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:15:34,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:15:34,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:15:34,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:15:34,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:15:34,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:15:34,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:15:34,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:15:34,975 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:15:34,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:15:34,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:15:34,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:15:34,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:15:34,977 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:15:34,977 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:15:34,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:15:34,977 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:15:34,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:15:35,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:15:35,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:15:35,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:15:35,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:15:35,209 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:15:35,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-19 03:15:35,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e696bbabc/0d51f675792044b889a27095ea570eaf/FLAGc66b64b7e [2022-03-19 03:15:35,640 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:15:35,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-19 03:15:35,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e696bbabc/0d51f675792044b889a27095ea570eaf/FLAGc66b64b7e [2022-03-19 03:15:36,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e696bbabc/0d51f675792044b889a27095ea570eaf [2022-03-19 03:15:36,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:15:36,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:15:36,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:15:36,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:15:36,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:15:36,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8d848a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36, skipping insertion in model container [2022-03-19 03:15:36,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:15:36,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:15:36,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2022-03-19 03:15:36,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:15:36,256 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:15:36,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c[490,503] [2022-03-19 03:15:36,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:15:36,278 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:15:36,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36 WrapperNode [2022-03-19 03:15:36,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:15:36,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:15:36,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:15:36,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:15:36,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:15:36,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:15:36,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:15:36,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:15:36,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (1/1) ... [2022-03-19 03:15:36,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:15:36,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:36,344 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) [2022-03-19 03:15:36,351 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 [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:15:36,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:15:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:15:36,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:15:36,424 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:15:36,426 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:15:36,568 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:15:36,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:15:36,572 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 03:15:36,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:15:36 BoogieIcfgContainer [2022-03-19 03:15:36,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:15:36,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:15:36,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:15:36,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:15:36,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:15:36" (1/3) ... [2022-03-19 03:15:36,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc3faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:15:36, skipping insertion in model container [2022-03-19 03:15:36,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:15:36" (2/3) ... [2022-03-19 03:15:36,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc3faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:15:36, skipping insertion in model container [2022-03-19 03:15:36,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:15:36" (3/3) ... [2022-03-19 03:15:36,613 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-03-19 03:15:36,616 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:15:36,617 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:15:36,650 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:15:36,654 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 [2022-03-19 03:15:36,655 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:15:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:15:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 03:15:36,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:36,686 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:36,686 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-03-19 03:15:36,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:36,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1771188781] [2022-03-19 03:15:36,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 2 times [2022-03-19 03:15:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:36,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458146364] [2022-03-19 03:15:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:36,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:15:36,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:15:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:15:36,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 03:15:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:15:36,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 03:15:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:15:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:15:36,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:36,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458146364] [2022-03-19 03:15:36,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458146364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:36,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:36,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:15:36,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:36,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1771188781] [2022-03-19 03:15:36,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1771188781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:36,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:36,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:15:36,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762560059] [2022-03-19 03:15:36,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:36,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 03:15:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 03:15:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:15:36,939 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:15:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:37,017 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-19 03:15:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 03:15:37,019 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 [2022-03-19 03:15:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:37,026 INFO L225 Difference]: With dead ends: 67 [2022-03-19 03:15:37,026 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 03:15:37,029 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 [2022-03-19 03:15:37,033 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:37,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:37,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 03:15:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 03:15:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 03:15:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-19 03:15:37,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-19 03:15:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:37,083 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-19 03:15:37,083 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) [2022-03-19 03:15:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-19 03:15:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 03:15:37,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:37,085 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] [2022-03-19 03:15:37,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:15:37,086 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:37,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-03-19 03:15:37,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:37,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557102198] [2022-03-19 03:15:37,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 2 times [2022-03-19 03:15:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:37,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111403614] [2022-03-19 03:15:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:37,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:37,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231595115] [2022-03-19 03:15:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:37,122 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) [2022-03-19 03:15:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:15:37,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 03:15:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 03:15:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:15:37,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:15:37,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111403614] [2022-03-19 03:15:37,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:37,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231595115] [2022-03-19 03:15:37,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231595115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:37,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:15:37,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:37,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557102198] [2022-03-19 03:15:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557102198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:37,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:37,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:15:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709880632] [2022-03-19 03:15:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:37,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:15:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:15:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:15:37,414 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 03:15:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:37,518 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-19 03:15:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:15:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 03:15:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:37,521 INFO L225 Difference]: With dead ends: 51 [2022-03-19 03:15:37,521 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 03:15:37,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:15:37,523 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:37,525 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 162 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 03:15:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-19 03:15:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 03:15:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-19 03:15:37,541 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-03-19 03:15:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:37,542 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-19 03:15:37,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 03:15:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-19 03:15:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 03:15:37,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:37,543 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] [2022-03-19 03:15:37,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:37,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:37,764 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-03-19 03:15:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:37,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [777329449] [2022-03-19 03:15:37,766 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 2 times [2022-03-19 03:15:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:37,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389586421] [2022-03-19 03:15:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:37,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941478731] [2022-03-19 03:15:37,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:37,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:37,798 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) [2022-03-19 03:15:37,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:15:37,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:15:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:15:37,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:15:38,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:38,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389586421] [2022-03-19 03:15:38,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:38,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941478731] [2022-03-19 03:15:38,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941478731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:38,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:38,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 03:15:38,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [777329449] [2022-03-19 03:15:38,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [777329449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:38,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:38,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:15:38,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329756701] [2022-03-19 03:15:38,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:38,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:15:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:15:38,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:15:38,073 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:15:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:38,197 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-19 03:15:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:15:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-19 03:15:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:38,199 INFO L225 Difference]: With dead ends: 100 [2022-03-19 03:15:38,199 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 03:15:38,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:15:38,200 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:38,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 259 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 03:15:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-19 03:15:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 03:15:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-19 03:15:38,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-19 03:15:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:38,217 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-19 03:15:38,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:15:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-19 03:15:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 03:15:38,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:38,218 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:38,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:38,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 03:15:38,432 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-03-19 03:15:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:38,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1352033498] [2022-03-19 03:15:38,433 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 2 times [2022-03-19 03:15:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:38,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351097709] [2022-03-19 03:15:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:38,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621785949] [2022-03-19 03:15:38,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:38,446 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) [2022-03-19 03:15:38,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:15:38,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:38,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 03:15:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:15:38,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:15:38,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351097709] [2022-03-19 03:15:38,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621785949] [2022-03-19 03:15:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621785949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:38,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:38,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-03-19 03:15:38,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1352033498] [2022-03-19 03:15:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1352033498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:38,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:38,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:15:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045327153] [2022-03-19 03:15:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:38,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:15:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:15:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:15:38,803 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:15:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:38,966 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2022-03-19 03:15:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:15:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-19 03:15:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:38,969 INFO L225 Difference]: With dead ends: 115 [2022-03-19 03:15:38,969 INFO L226 Difference]: Without dead ends: 113 [2022-03-19 03:15:38,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:15:38,972 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:38,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 339 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-19 03:15:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-19 03:15:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:15:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-19 03:15:39,004 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-19 03:15:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:39,004 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-19 03:15:39,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:15:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-19 03:15:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 03:15:39,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:39,005 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:39,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:39,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:39,209 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-03-19 03:15:39,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:39,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107099911] [2022-03-19 03:15:39,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 2 times [2022-03-19 03:15:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878310486] [2022-03-19 03:15:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:39,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:39,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052340153] [2022-03-19 03:15:39,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:39,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:39,222 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) [2022-03-19 03:15:39,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:15:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 03:15:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 03:15:39,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:15:39,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878310486] [2022-03-19 03:15:39,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052340153] [2022-03-19 03:15:39,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052340153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:39,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:39,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:15:39,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107099911] [2022-03-19 03:15:39,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107099911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:39,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:39,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:15:39,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344118843] [2022-03-19 03:15:39,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:39,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:15:39,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:15:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:15:39,385 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:15:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:39,502 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-19 03:15:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:15:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 03:15:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:39,503 INFO L225 Difference]: With dead ends: 115 [2022-03-19 03:15:39,503 INFO L226 Difference]: Without dead ends: 113 [2022-03-19 03:15:39,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:15:39,505 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:39,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 214 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-19 03:15:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-19 03:15:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 03:15:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-03-19 03:15:39,539 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2022-03-19 03:15:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:39,540 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-03-19 03:15:39,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:15:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-03-19 03:15:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 03:15:39,546 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:39,546 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:39,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:39,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:39,759 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-03-19 03:15:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:39,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982161270] [2022-03-19 03:15:39,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 2 times [2022-03-19 03:15:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:39,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131312491] [2022-03-19 03:15:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:39,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:39,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:39,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665496891] [2022-03-19 03:15:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:39,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:39,776 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) [2022-03-19 03:15:39,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:15:39,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 03:15:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:15:40,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:15:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131312491] [2022-03-19 03:15:40,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665496891] [2022-03-19 03:15:40,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665496891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:40,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:40,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-19 03:15:40,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982161270] [2022-03-19 03:15:40,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982161270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:40,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:40,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:15:40,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696008570] [2022-03-19 03:15:40,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:40,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:15:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:15:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:15:40,165 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 03:15:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:40,311 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-03-19 03:15:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:15:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-03-19 03:15:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:40,313 INFO L225 Difference]: With dead ends: 121 [2022-03-19 03:15:40,313 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 03:15:40,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:15:40,315 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:40,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 304 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 03:15:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-19 03:15:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 79 states have internal predecessors, (97), 29 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 03:15:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2022-03-19 03:15:40,329 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2022-03-19 03:15:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:40,330 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2022-03-19 03:15:40,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 03:15:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2022-03-19 03:15:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 03:15:40,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:40,332 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:40,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:40,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:40,548 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 3 times [2022-03-19 03:15:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688543111] [2022-03-19 03:15:40,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 4 times [2022-03-19 03:15:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:40,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475481323] [2022-03-19 03:15:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:40,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:40,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076394399] [2022-03-19 03:15:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:15:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:40,558 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) [2022-03-19 03:15:40,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:15:40,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:15:40,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:40,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 03:15:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:15:40,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:15:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475481323] [2022-03-19 03:15:40,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076394399] [2022-03-19 03:15:40,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076394399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:40,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:40,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:40,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688543111] [2022-03-19 03:15:40,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688543111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:40,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:40,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:40,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401403739] [2022-03-19 03:15:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:40,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:15:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:15:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:15:40,655 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 03:15:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:40,713 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-03-19 03:15:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:15:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-03-19 03:15:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:40,715 INFO L225 Difference]: With dead ends: 165 [2022-03-19 03:15:40,716 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 03:15:40,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 03:15:40,717 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:40,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 03:15:40,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-03-19 03:15:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:15:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-03-19 03:15:40,734 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2022-03-19 03:15:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:40,735 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-03-19 03:15:40,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 03:15:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-03-19 03:15:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 03:15:40,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:40,736 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:40,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:40,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:40,952 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-03-19 03:15:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:40,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [378511224] [2022-03-19 03:15:40,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 2 times [2022-03-19 03:15:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:40,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595831252] [2022-03-19 03:15:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:40,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:40,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750150470] [2022-03-19 03:15:40,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:40,962 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) [2022-03-19 03:15:40,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 03:15:40,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:15:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:15:41,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:15:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:41,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595831252] [2022-03-19 03:15:41,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:41,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750150470] [2022-03-19 03:15:41,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750150470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:41,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:41,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:41,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:41,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [378511224] [2022-03-19 03:15:41,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [378511224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:41,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:41,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:41,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831091862] [2022-03-19 03:15:41,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:41,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:15:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:15:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:15:41,063 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 03:15:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:41,104 INFO L93 Difference]: Finished difference Result 151 states and 206 transitions. [2022-03-19 03:15:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:15:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-19 03:15:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:41,106 INFO L225 Difference]: With dead ends: 151 [2022-03-19 03:15:41,106 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 03:15:41,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:15:41,106 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:41,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:41,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 03:15:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2022-03-19 03:15:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 81 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 03:15:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2022-03-19 03:15:41,120 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2022-03-19 03:15:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:41,121 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2022-03-19 03:15:41,121 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) [2022-03-19 03:15:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2022-03-19 03:15:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 03:15:41,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:41,121 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:41,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:41,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:41,336 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 1 times [2022-03-19 03:15:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998435227] [2022-03-19 03:15:41,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 2 times [2022-03-19 03:15:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953681816] [2022-03-19 03:15:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:41,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726181568] [2022-03-19 03:15:41,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:41,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:41,344 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) [2022-03-19 03:15:41,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 03:15:41,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:41,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 03:15:41,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 03:15:41,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 03:15:41,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953681816] [2022-03-19 03:15:41,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726181568] [2022-03-19 03:15:41,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726181568] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 03:15:41,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:15:41,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-03-19 03:15:41,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998435227] [2022-03-19 03:15:41,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998435227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:41,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:41,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:41,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329833673] [2022-03-19 03:15:41,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:41,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:15:41,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:15:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:15:41,588 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:15:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:41,640 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-03-19 03:15:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:15:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-03-19 03:15:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:41,643 INFO L225 Difference]: With dead ends: 173 [2022-03-19 03:15:41,643 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 03:15:41,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:15:41,644 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:41,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 03:15:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-19 03:15:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-19 03:15:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-03-19 03:15:41,663 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 41 [2022-03-19 03:15:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:41,664 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-03-19 03:15:41,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 03:15:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-03-19 03:15:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 03:15:41,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:41,664 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:41,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:41,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 03:15:41,880 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-03-19 03:15:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [158211220] [2022-03-19 03:15:41,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 2 times [2022-03-19 03:15:41,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:41,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988416317] [2022-03-19 03:15:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:41,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:41,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648279537] [2022-03-19 03:15:41,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:41,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:41,889 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) [2022-03-19 03:15:41,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 03:15:41,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:41,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 03:15:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:15:42,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:15:43,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988416317] [2022-03-19 03:15:43,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648279537] [2022-03-19 03:15:43,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648279537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:43,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:43,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-19 03:15:43,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:43,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [158211220] [2022-03-19 03:15:43,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [158211220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:43,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:43,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:15:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136820345] [2022-03-19 03:15:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:43,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:15:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:15:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:15:43,108 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:15:43,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:43,488 INFO L93 Difference]: Finished difference Result 230 states and 330 transitions. [2022-03-19 03:15:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 03:15:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-03-19 03:15:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:43,490 INFO L225 Difference]: With dead ends: 230 [2022-03-19 03:15:43,490 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 03:15:43,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-19 03:15:43,491 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:43,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 342 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:15:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 03:15:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-19 03:15:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 117 states have (on average 1.188034188034188) internal successors, (139), 128 states have internal predecessors, (139), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 81 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 03:15:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 323 transitions. [2022-03-19 03:15:43,530 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 323 transitions. Word has length 53 [2022-03-19 03:15:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:43,531 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 323 transitions. [2022-03-19 03:15:43,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 03:15:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 323 transitions. [2022-03-19 03:15:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-19 03:15:43,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:43,531 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:43,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:43,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 03:15:43,745 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 3 times [2022-03-19 03:15:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818536639] [2022-03-19 03:15:43,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 4 times [2022-03-19 03:15:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717919353] [2022-03-19 03:15:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:43,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:43,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799383857] [2022-03-19 03:15:43,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:15:43,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:43,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:43,754 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) [2022-03-19 03:15:43,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 03:15:43,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:15:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 03:15:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 03:15:43,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 03:15:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717919353] [2022-03-19 03:15:43,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799383857] [2022-03-19 03:15:43,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799383857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:43,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:43,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-19 03:15:43,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818536639] [2022-03-19 03:15:43,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818536639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:43,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:43,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:15:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81101769] [2022-03-19 03:15:43,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:43,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:15:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:15:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:15:43,978 INFO L87 Difference]: Start difference. First operand 224 states and 323 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:44,245 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2022-03-19 03:15:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:15:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2022-03-19 03:15:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:44,249 INFO L225 Difference]: With dead ends: 335 [2022-03-19 03:15:44,249 INFO L226 Difference]: Without dead ends: 328 [2022-03-19 03:15:44,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-19 03:15:44,250 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:44,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 359 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:15:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-19 03:15:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 243. [2022-03-19 03:15:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 143 states have internal predecessors, (166), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 03:15:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 350 transitions. [2022-03-19 03:15:44,297 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 350 transitions. Word has length 58 [2022-03-19 03:15:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:44,297 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 350 transitions. [2022-03-19 03:15:44,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 350 transitions. [2022-03-19 03:15:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 03:15:44,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:44,298 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:44,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:44,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 03:15:44,500 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-03-19 03:15:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415940706] [2022-03-19 03:15:44,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 2 times [2022-03-19 03:15:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:44,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651698241] [2022-03-19 03:15:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:44,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:44,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:44,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101977052] [2022-03-19 03:15:44,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:44,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:44,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:44,509 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) [2022-03-19 03:15:44,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 03:15:44,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 03:15:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-19 03:15:44,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-19 03:15:44,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651698241] [2022-03-19 03:15:44,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:44,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101977052] [2022-03-19 03:15:44,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101977052] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 03:15:44,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:15:44,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-19 03:15:44,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:44,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415940706] [2022-03-19 03:15:44,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415940706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:44,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:44,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064124820] [2022-03-19 03:15:44,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:44,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:15:44,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:15:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:15:44,842 INFO L87 Difference]: Start difference. First operand 243 states and 350 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:44,894 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-03-19 03:15:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 03:15:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-03-19 03:15:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:44,897 INFO L225 Difference]: With dead ends: 249 [2022-03-19 03:15:44,897 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 03:15:44,898 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:15:44,898 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:44,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 03:15:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-19 03:15:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 146 states have internal predecessors, (169), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 03:15:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 353 transitions. [2022-03-19 03:15:44,932 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 353 transitions. Word has length 63 [2022-03-19 03:15:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:44,933 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 353 transitions. [2022-03-19 03:15:44,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 353 transitions. [2022-03-19 03:15:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 03:15:44,934 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:44,934 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:44,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:45,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 03:15:45,147 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 1 times [2022-03-19 03:15:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [13548712] [2022-03-19 03:15:45,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 2 times [2022-03-19 03:15:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444385277] [2022-03-19 03:15:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:45,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735963483] [2022-03-19 03:15:45,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:45,157 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:15:45,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 03:15:45,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 03:15:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 03:15:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 03:15:45,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:45,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444385277] [2022-03-19 03:15:45,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735963483] [2022-03-19 03:15:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735963483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:45,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:45,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 03:15:45,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [13548712] [2022-03-19 03:15:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [13548712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:45,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:45,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:15:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247501152] [2022-03-19 03:15:45,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:45,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:15:45,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:45,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:15:45,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:15:45,455 INFO L87 Difference]: Start difference. First operand 247 states and 353 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:45,671 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2022-03-19 03:15:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 03:15:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-03-19 03:15:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:45,673 INFO L225 Difference]: With dead ends: 261 [2022-03-19 03:15:45,673 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 03:15:45,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:15:45,674 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:45,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 141 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:15:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 03:15:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-19 03:15:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 148 states have (on average 1.2027027027027026) internal successors, (178), 155 states have internal predecessors, (178), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 03:15:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-03-19 03:15:45,735 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 61 [2022-03-19 03:15:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:45,735 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-03-19 03:15:45,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 03:15:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-03-19 03:15:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 03:15:45,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:45,736 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:45,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:45,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 03:15:45,955 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 3 times [2022-03-19 03:15:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:45,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044788045] [2022-03-19 03:15:45,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 4 times [2022-03-19 03:15:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:45,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751258054] [2022-03-19 03:15:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:45,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:45,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237976794] [2022-03-19 03:15:45,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:15:45,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:45,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:45,969 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) [2022-03-19 03:15:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 03:15:46,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:15:46,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 03:15:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 03:15:46,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:15:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751258054] [2022-03-19 03:15:46,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237976794] [2022-03-19 03:15:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237976794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:46,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:46,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044788045] [2022-03-19 03:15:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044788045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:46,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:15:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907516346] [2022-03-19 03:15:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:46,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:15:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:15:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 03:15:46,087 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:15:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:46,171 INFO L93 Difference]: Finished difference Result 445 states and 620 transitions. [2022-03-19 03:15:46,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:15:46,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-19 03:15:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:46,173 INFO L225 Difference]: With dead ends: 445 [2022-03-19 03:15:46,173 INFO L226 Difference]: Without dead ends: 270 [2022-03-19 03:15:46,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:15:46,175 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:46,175 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:15:46,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-19 03:15:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 250. [2022-03-19 03:15:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 148 states have internal predecessors, (176), 85 states have call successors, (85), 18 states have call predecessors, (85), 17 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 03:15:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-03-19 03:15:46,212 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 66 [2022-03-19 03:15:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:46,212 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-03-19 03:15:46,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 03:15:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-03-19 03:15:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 03:15:46,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:46,213 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:46,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:46,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 03:15:46,427 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 5 times [2022-03-19 03:15:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000923731] [2022-03-19 03:15:46,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 6 times [2022-03-19 03:15:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84881763] [2022-03-19 03:15:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:46,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:46,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:46,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900135521] [2022-03-19 03:15:46,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:15:46,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:46,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:46,436 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) [2022-03-19 03:15:46,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 03:15:46,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 03:15:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 03:15:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:47,132 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:15:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 03:15:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:48,387 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:15:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-19 03:15:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:15:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84881763] [2022-03-19 03:15:52,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:15:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900135521] [2022-03-19 03:15:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900135521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:15:52,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:15:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-19 03:15:52,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:15:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000923731] [2022-03-19 03:15:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000923731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:15:52,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:15:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:15:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457327268] [2022-03-19 03:15:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:15:52,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:15:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:15:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-19 03:15:52,197 INFO L87 Difference]: Start difference. First operand 250 states and 344 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 03:15:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:15:53,313 INFO L93 Difference]: Finished difference Result 321 states and 431 transitions. [2022-03-19 03:15:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:15:53,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-03-19 03:15:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:15:53,315 INFO L225 Difference]: With dead ends: 321 [2022-03-19 03:15:53,315 INFO L226 Difference]: Without dead ends: 319 [2022-03-19 03:15:53,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 03:15:53,316 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:15:53,316 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 454 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:15:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-19 03:15:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-03-19 03:15:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 182 states have internal predecessors, (215), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-19 03:15:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2022-03-19 03:15:53,358 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2022-03-19 03:15:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:15:53,359 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2022-03-19 03:15:53,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-19 03:15:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2022-03-19 03:15:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 03:15:53,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:15:53,360 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:15:53,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 03:15:53,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:53,577 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:15:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:15:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 1 times [2022-03-19 03:15:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:15:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193375564] [2022-03-19 03:15:53,578 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:15:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 2 times [2022-03-19 03:15:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:15:53,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097748207] [2022-03-19 03:15:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:15:53,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:15:53,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:15:53,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621248243] [2022-03-19 03:15:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:15:53,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:15:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:15:53,590 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) [2022-03-19 03:15:53,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 03:15:53,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:15:53,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:15:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-19 03:15:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:15:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 19 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-19 03:15:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:15:54,687 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:15:54,689 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:12,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097748207] [2022-03-19 03:16:12,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621248243] [2022-03-19 03:16:12,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621248243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:16:12,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:16:12,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 03:16:12,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:12,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193375564] [2022-03-19 03:16:12,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193375564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:12,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:12,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:16:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048813960] [2022-03-19 03:16:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:12,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:16:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:16:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=392, Unknown=1, NotChecked=0, Total=462 [2022-03-19 03:16:12,722 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 03:16:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:13,397 INFO L93 Difference]: Finished difference Result 388 states and 532 transitions. [2022-03-19 03:16:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 03:16:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2022-03-19 03:16:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:13,403 INFO L225 Difference]: With dead ends: 388 [2022-03-19 03:16:13,403 INFO L226 Difference]: Without dead ends: 385 [2022-03-19 03:16:13,404 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=100, Invalid=549, Unknown=1, NotChecked=0, Total=650 [2022-03-19 03:16:13,404 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:13,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 334 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:16:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-19 03:16:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-03-19 03:16:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 190 states have internal predecessors, (225), 105 states have call successors, (105), 24 states have call predecessors, (105), 23 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 03:16:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2022-03-19 03:16:13,468 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 75 [2022-03-19 03:16:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:13,468 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2022-03-19 03:16:13,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 03:16:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2022-03-19 03:16:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 03:16:13,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:13,469 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:13,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 03:16:13,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 03:16:13,683 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 3 times [2022-03-19 03:16:13,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282873324] [2022-03-19 03:16:13,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 4 times [2022-03-19 03:16:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:13,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81899145] [2022-03-19 03:16:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:13,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776474143] [2022-03-19 03:16:13,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:16:13,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:13,690 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) [2022-03-19 03:16:13,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 03:16:13,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:16:13,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 03:16:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-19 03:16:14,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:16,928 WARN L855 $PredicateComparison]: unable to prove that (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (not (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) 0)) (= (let ((.cse0 (+ c_main_~d~0 c_main_~k~0))) (+ c_main_~b~0 (* (+ (* (- 1) (* c_main_~s~0 .cse0)) c_main_~r~0) c_main_~y~0) (* (+ (* (- 1) c_main_~q~0 .cse0) c_main_~p~0) c_main_~x~0))) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) is different from true [2022-03-19 03:16:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 49 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 2 not checked. [2022-03-19 03:16:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81899145] [2022-03-19 03:16:18,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776474143] [2022-03-19 03:16:18,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776474143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:18,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:18,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-03-19 03:16:18,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282873324] [2022-03-19 03:16:18,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282873324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:18,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:18,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:16:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730870803] [2022-03-19 03:16:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:18,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:16:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:16:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=550, Unknown=1, NotChecked=48, Total=702 [2022-03-19 03:16:18,100 INFO L87 Difference]: Start difference. First operand 318 states and 433 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:16:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:19,371 INFO L93 Difference]: Finished difference Result 406 states and 555 transitions. [2022-03-19 03:16:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:16:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 80 [2022-03-19 03:16:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:19,375 INFO L225 Difference]: With dead ends: 406 [2022-03-19 03:16:19,375 INFO L226 Difference]: Without dead ends: 403 [2022-03-19 03:16:19,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=140, Invalid=793, Unknown=1, NotChecked=58, Total=992 [2022-03-19 03:16:19,377 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:19,377 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 549 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:16:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-19 03:16:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-03-19 03:16:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 227 states have internal predecessors, (271), 133 states have call successors, (133), 28 states have call predecessors, (133), 27 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 03:16:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 535 transitions. [2022-03-19 03:16:19,451 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 535 transitions. Word has length 80 [2022-03-19 03:16:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:19,451 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 535 transitions. [2022-03-19 03:16:19,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 03:16:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 535 transitions. [2022-03-19 03:16:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 03:16:19,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:19,452 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:19,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:19,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 03:16:19,670 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 1 times [2022-03-19 03:16:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:19,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758492941] [2022-03-19 03:16:19,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 2 times [2022-03-19 03:16:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629848142] [2022-03-19 03:16:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:19,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:19,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408936805] [2022-03-19 03:16:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:19,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:19,680 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) [2022-03-19 03:16:19,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 03:16:19,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:19,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 03:16:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 03:16:19,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 03:16:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:20,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629848142] [2022-03-19 03:16:20,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:20,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408936805] [2022-03-19 03:16:20,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408936805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:20,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:20,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-19 03:16:20,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:20,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758492941] [2022-03-19 03:16:20,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758492941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:20,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:20,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:16:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28052180] [2022-03-19 03:16:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:20,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:16:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:16:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:16:20,722 INFO L87 Difference]: Start difference. First operand 387 states and 535 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 03:16:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:21,011 INFO L93 Difference]: Finished difference Result 540 states and 774 transitions. [2022-03-19 03:16:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:16:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-03-19 03:16:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:21,016 INFO L225 Difference]: With dead ends: 540 [2022-03-19 03:16:21,016 INFO L226 Difference]: Without dead ends: 538 [2022-03-19 03:16:21,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-19 03:16:21,017 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:21,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 386 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:16:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-19 03:16:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 520. [2022-03-19 03:16:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 287 states have (on average 1.2334494773519165) internal successors, (354), 288 states have internal predecessors, (354), 201 states have call successors, (201), 32 states have call predecessors, (201), 31 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-19 03:16:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 754 transitions. [2022-03-19 03:16:21,112 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 754 transitions. Word has length 83 [2022-03-19 03:16:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:21,112 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 754 transitions. [2022-03-19 03:16:21,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 03:16:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 754 transitions. [2022-03-19 03:16:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 03:16:21,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:21,113 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:21,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 03:16:21,331 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 7 times [2022-03-19 03:16:21,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:21,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482630522] [2022-03-19 03:16:21,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 8 times [2022-03-19 03:16:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:21,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754220447] [2022-03-19 03:16:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:21,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979304595] [2022-03-19 03:16:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:21,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:21,339 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) [2022-03-19 03:16:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 03:16:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-19 03:16:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:21,840 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:23,229 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:23,231 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:23,936 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-19 03:16:24,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-19 03:16:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:26,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754220447] [2022-03-19 03:16:26,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:26,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979304595] [2022-03-19 03:16:26,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979304595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:26,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:26,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-03-19 03:16:26,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482630522] [2022-03-19 03:16:26,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482630522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:26,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:26,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 03:16:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621590964] [2022-03-19 03:16:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:26,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 03:16:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 03:16:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-19 03:16:26,324 INFO L87 Difference]: Start difference. First operand 520 states and 754 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 03:16:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:28,309 INFO L93 Difference]: Finished difference Result 606 states and 880 transitions. [2022-03-19 03:16:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:16:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 91 [2022-03-19 03:16:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:28,313 INFO L225 Difference]: With dead ends: 606 [2022-03-19 03:16:28,313 INFO L226 Difference]: Without dead ends: 604 [2022-03-19 03:16:28,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 03:16:28,314 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:28,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 592 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 578 Invalid, 0 Unknown, 212 Unchecked, 1.0s Time] [2022-03-19 03:16:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-19 03:16:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2022-03-19 03:16:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 328 states have (on average 1.2347560975609757) internal successors, (405), 329 states have internal predecessors, (405), 233 states have call successors, (233), 34 states have call predecessors, (233), 33 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-19 03:16:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 869 transitions. [2022-03-19 03:16:28,446 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 869 transitions. Word has length 91 [2022-03-19 03:16:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:28,447 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 869 transitions. [2022-03-19 03:16:28,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-19 03:16:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 869 transitions. [2022-03-19 03:16:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 03:16:28,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:28,448 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:28,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:28,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:28,663 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 5 times [2022-03-19 03:16:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:28,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822774610] [2022-03-19 03:16:28,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 6 times [2022-03-19 03:16:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:28,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636320471] [2022-03-19 03:16:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:28,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218177897] [2022-03-19 03:16:28,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:16:28,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:28,671 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) [2022-03-19 03:16:28,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 03:16:28,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 03:16:28,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:16:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 03:16:29,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:29,437 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:31,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636320471] [2022-03-19 03:16:31,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218177897] [2022-03-19 03:16:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218177897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:16:31,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:16:31,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 03:16:31,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822774610] [2022-03-19 03:16:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822774610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:31,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:31,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:16:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883561767] [2022-03-19 03:16:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:31,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:16:31,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:16:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2022-03-19 03:16:31,551 INFO L87 Difference]: Start difference. First operand 595 states and 869 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 03:16:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:32,042 INFO L93 Difference]: Finished difference Result 686 states and 997 transitions. [2022-03-19 03:16:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 03:16:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2022-03-19 03:16:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:32,046 INFO L225 Difference]: With dead ends: 686 [2022-03-19 03:16:32,047 INFO L226 Difference]: Without dead ends: 683 [2022-03-19 03:16:32,047 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=92, Invalid=413, Unknown=1, NotChecked=0, Total=506 [2022-03-19 03:16:32,048 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:32,048 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 299 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:16:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-19 03:16:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 675. [2022-03-19 03:16:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 372 states have (on average 1.2338709677419355) internal successors, (459), 374 states have internal predecessors, (459), 264 states have call successors, (264), 39 states have call predecessors, (264), 38 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-03-19 03:16:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 985 transitions. [2022-03-19 03:16:32,217 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 985 transitions. Word has length 97 [2022-03-19 03:16:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:32,217 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 985 transitions. [2022-03-19 03:16:32,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 03:16:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 985 transitions. [2022-03-19 03:16:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-19 03:16:32,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:32,218 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:32,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:32,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:32,431 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 9 times [2022-03-19 03:16:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017941278] [2022-03-19 03:16:32,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 10 times [2022-03-19 03:16:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687789406] [2022-03-19 03:16:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:32,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:32,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115340930] [2022-03-19 03:16:32,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:16:32,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:32,439 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) [2022-03-19 03:16:32,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 03:16:32,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:16:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-19 03:16:32,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-19 03:16:34,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-19 03:16:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:35,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687789406] [2022-03-19 03:16:35,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115340930] [2022-03-19 03:16:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115340930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:35,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 33 [2022-03-19 03:16:35,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017941278] [2022-03-19 03:16:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017941278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:35,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:35,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:16:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893942595] [2022-03-19 03:16:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:35,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:16:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:16:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 03:16:35,737 INFO L87 Difference]: Start difference. First operand 675 states and 985 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-19 03:16:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:37,265 INFO L93 Difference]: Finished difference Result 767 states and 1110 transitions. [2022-03-19 03:16:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:16:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2022-03-19 03:16:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:37,269 INFO L225 Difference]: With dead ends: 767 [2022-03-19 03:16:37,269 INFO L226 Difference]: Without dead ends: 765 [2022-03-19 03:16:37,270 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 03:16:37,270 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:37,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 732 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 03:16:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-19 03:16:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2022-03-19 03:16:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 412 states have (on average 1.233009708737864) internal successors, (508), 414 states have internal predecessors, (508), 292 states have call successors, (292), 43 states have call predecessors, (292), 42 states have return successors, (290), 289 states have call predecessors, (290), 290 states have call successors, (290) [2022-03-19 03:16:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1090 transitions. [2022-03-19 03:16:37,446 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1090 transitions. Word has length 96 [2022-03-19 03:16:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:37,446 INFO L478 AbstractCegarLoop]: Abstraction has 747 states and 1090 transitions. [2022-03-19 03:16:37,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-19 03:16:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1090 transitions. [2022-03-19 03:16:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 03:16:37,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:37,448 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:37,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:37,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 03:16:37,653 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 7 times [2022-03-19 03:16:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1979244366] [2022-03-19 03:16:37,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 8 times [2022-03-19 03:16:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:37,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64787852] [2022-03-19 03:16:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:37,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:37,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641122294] [2022-03-19 03:16:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:16:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:37,662 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) [2022-03-19 03:16:37,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 03:16:37,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:16:37,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 03:16:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:38,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 03:16:38,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:40,178 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:16:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64787852] [2022-03-19 03:16:41,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641122294] [2022-03-19 03:16:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641122294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:16:41,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:16:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 03:16:41,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1979244366] [2022-03-19 03:16:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1979244366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:41,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:41,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:16:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128023779] [2022-03-19 03:16:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:41,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:16:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:16:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-19 03:16:41,094 INFO L87 Difference]: Start difference. First operand 747 states and 1090 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 03:16:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:43,799 INFO L93 Difference]: Finished difference Result 831 states and 1208 transitions. [2022-03-19 03:16:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:16:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-03-19 03:16:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:43,805 INFO L225 Difference]: With dead ends: 831 [2022-03-19 03:16:43,805 INFO L226 Difference]: Without dead ends: 828 [2022-03-19 03:16:43,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 03:16:43,806 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:43,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 566 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 03:16:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-19 03:16:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 819. [2022-03-19 03:16:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 452 states have (on average 1.2323008849557522) internal successors, (557), 454 states have internal predecessors, (557), 320 states have call successors, (320), 47 states have call predecessors, (320), 46 states have return successors, (318), 317 states have call predecessors, (318), 318 states have call successors, (318) [2022-03-19 03:16:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1195 transitions. [2022-03-19 03:16:43,992 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1195 transitions. Word has length 100 [2022-03-19 03:16:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:43,993 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1195 transitions. [2022-03-19 03:16:43,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-19 03:16:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1195 transitions. [2022-03-19 03:16:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 03:16:43,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:43,994 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:44,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:44,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 03:16:44,211 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 9 times [2022-03-19 03:16:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1887210521] [2022-03-19 03:16:44,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 10 times [2022-03-19 03:16:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685849456] [2022-03-19 03:16:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:44,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:44,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982334456] [2022-03-19 03:16:44,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:16:44,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:44,219 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) [2022-03-19 03:16:44,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 03:16:44,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:16:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 03:16:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-19 03:16:46,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:16:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-19 03:16:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:16:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685849456] [2022-03-19 03:16:53,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:16:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982334456] [2022-03-19 03:16:53,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982334456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:16:53,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:16:53,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-19 03:16:53,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:16:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1887210521] [2022-03-19 03:16:53,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1887210521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:16:53,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:16:53,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:16:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255348194] [2022-03-19 03:16:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:16:53,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:16:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:16:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 03:16:53,552 INFO L87 Difference]: Start difference. First operand 819 states and 1195 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 03:16:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:16:56,928 INFO L93 Difference]: Finished difference Result 923 states and 1350 transitions. [2022-03-19 03:16:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 03:16:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 102 [2022-03-19 03:16:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:16:56,933 INFO L225 Difference]: With dead ends: 923 [2022-03-19 03:16:56,933 INFO L226 Difference]: Without dead ends: 920 [2022-03-19 03:16:56,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 03:16:56,934 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:16:56,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 657 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 03:16:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-19 03:16:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-03-19 03:16:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 495 states have (on average 1.2383838383838384) internal successors, (613), 497 states have internal predecessors, (613), 360 states have call successors, (360), 50 states have call predecessors, (360), 49 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-19 03:16:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1331 transitions. [2022-03-19 03:16:57,148 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1331 transitions. Word has length 102 [2022-03-19 03:16:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:16:57,149 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1331 transitions. [2022-03-19 03:16:57,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-19 03:16:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1331 transitions. [2022-03-19 03:16:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 03:16:57,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:16:57,150 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:16:57,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 03:16:57,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:57,363 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:16:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:16:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 11 times [2022-03-19 03:16:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:16:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584443304] [2022-03-19 03:16:57,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:16:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 12 times [2022-03-19 03:16:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:16:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473282352] [2022-03-19 03:16:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:16:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:16:57,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:16:57,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868913527] [2022-03-19 03:16:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:16:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:16:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:16:57,371 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) [2022-03-19 03:16:57,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 03:16:57,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 03:16:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:16:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 03:16:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:16:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-19 03:16:58,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:17:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-19 03:17:01,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:17:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473282352] [2022-03-19 03:17:01,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:17:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868913527] [2022-03-19 03:17:01,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868913527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:17:01,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:17:01,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-19 03:17:01,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:17:01,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584443304] [2022-03-19 03:17:01,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584443304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:17:01,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:17:01,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:17:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750989166] [2022-03-19 03:17:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:17:01,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:17:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:17:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=783, Unknown=1, NotChecked=0, Total=930 [2022-03-19 03:17:01,733 INFO L87 Difference]: Start difference. First operand 905 states and 1331 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 03:17:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:17:02,896 INFO L93 Difference]: Finished difference Result 990 states and 1451 transitions. [2022-03-19 03:17:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 03:17:02,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 105 [2022-03-19 03:17:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:17:02,903 INFO L225 Difference]: With dead ends: 990 [2022-03-19 03:17:02,903 INFO L226 Difference]: Without dead ends: 987 [2022-03-19 03:17:02,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=278, Invalid=1361, Unknown=1, NotChecked=0, Total=1640 [2022-03-19 03:17:02,904 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:17:02,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 657 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:17:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-19 03:17:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 912. [2022-03-19 03:17:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 501 states have (on average 1.2355289421157685) internal successors, (619), 503 states have internal predecessors, (619), 360 states have call successors, (360), 51 states have call predecessors, (360), 50 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-19 03:17:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1337 transitions. [2022-03-19 03:17:03,117 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1337 transitions. Word has length 105 [2022-03-19 03:17:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:17:03,117 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1337 transitions. [2022-03-19 03:17:03,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 03:17:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1337 transitions. [2022-03-19 03:17:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 03:17:03,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:17:03,119 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:17:03,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 03:17:03,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:17:03,331 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:17:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:17:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 13 times [2022-03-19 03:17:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:03,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356503034] [2022-03-19 03:17:03,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:17:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 14 times [2022-03-19 03:17:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:17:03,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073737995] [2022-03-19 03:17:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:17:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:17:03,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:17:03,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315852840] [2022-03-19 03:17:03,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:17:03,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:17:03,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:17:03,344 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) [2022-03-19 03:17:03,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 03:17:03,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:17:03,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:17:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-19 03:17:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:17:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 76 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 03:17:04,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:17:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-19 03:17:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:17:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073737995] [2022-03-19 03:17:06,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:17:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315852840] [2022-03-19 03:17:06,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315852840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:17:06,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:17:06,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-03-19 03:17:06,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:17:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356503034] [2022-03-19 03:17:06,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356503034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:17:06,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:17:06,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 03:17:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449413599] [2022-03-19 03:17:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:17:06,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 03:17:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 03:17:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-19 03:17:06,428 INFO L87 Difference]: Start difference. First operand 912 states and 1337 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 03:17:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:17:10,319 INFO L93 Difference]: Finished difference Result 1057 states and 1544 transitions. [2022-03-19 03:17:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 03:17:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 105 [2022-03-19 03:17:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:17:10,324 INFO L225 Difference]: With dead ends: 1057 [2022-03-19 03:17:10,324 INFO L226 Difference]: Without dead ends: 1054 [2022-03-19 03:17:10,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 03:17:10,325 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:17:10,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 685 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 03:17:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-19 03:17:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 978. [2022-03-19 03:17:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 537 states have (on average 1.23463687150838) internal successors, (663), 539 states have internal predecessors, (663), 384 states have call successors, (384), 57 states have call predecessors, (384), 56 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-19 03:17:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1429 transitions. [2022-03-19 03:17:10,560 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1429 transitions. Word has length 105 [2022-03-19 03:17:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:17:10,560 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1429 transitions. [2022-03-19 03:17:10,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 03:17:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1429 transitions. [2022-03-19 03:17:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 03:17:10,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:17:10,562 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:17:10,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 03:17:10,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 03:17:10,771 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:17:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:17:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 15 times [2022-03-19 03:17:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465639013] [2022-03-19 03:17:10,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:17:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 16 times [2022-03-19 03:17:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:17:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945590099] [2022-03-19 03:17:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:17:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:17:10,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:17:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502588094] [2022-03-19 03:17:10,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:17:10,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:17:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:17:10,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:17:10,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 03:17:10,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:17:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:17:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-19 03:17:10,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:17:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 94 proven. 89 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 03:17:13,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:17:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-19 03:17:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:17:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945590099] [2022-03-19 03:17:14,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:17:14,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502588094] [2022-03-19 03:17:14,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502588094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:17:14,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:17:14,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-03-19 03:17:14,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:17:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465639013] [2022-03-19 03:17:14,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465639013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:17:14,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:17:14,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 03:17:14,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632436563] [2022-03-19 03:17:14,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:17:14,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 03:17:14,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 03:17:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 03:17:14,777 INFO L87 Difference]: Start difference. First operand 978 states and 1429 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 03:17:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:17:17,215 INFO L93 Difference]: Finished difference Result 1079 states and 1562 transitions. [2022-03-19 03:17:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:17:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 110 [2022-03-19 03:17:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:17:17,221 INFO L225 Difference]: With dead ends: 1079 [2022-03-19 03:17:17,221 INFO L226 Difference]: Without dead ends: 1076 [2022-03-19 03:17:17,221 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 03:17:17,222 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:17:17,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 832 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 03:17:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-19 03:17:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 930. [2022-03-19 03:17:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 515 states have (on average 1.2271844660194176) internal successors, (632), 517 states have internal predecessors, (632), 356 states have call successors, (356), 59 states have call predecessors, (356), 58 states have return successors, (354), 353 states have call predecessors, (354), 354 states have call successors, (354) [2022-03-19 03:17:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1342 transitions. [2022-03-19 03:17:17,444 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1342 transitions. Word has length 110 [2022-03-19 03:17:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:17:17,445 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1342 transitions. [2022-03-19 03:17:17,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-19 03:17:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1342 transitions. [2022-03-19 03:17:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 03:17:17,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:17:17,449 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:17:17,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 03:17:17,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 03:17:17,663 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:17:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:17:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 1 times [2022-03-19 03:17:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:17,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1735456512] [2022-03-19 03:17:17,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:17:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 2 times [2022-03-19 03:17:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:17:17,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795143542] [2022-03-19 03:17:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:17:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:17:17,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:17:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992703632] [2022-03-19 03:17:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:17:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:17:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:17:17,673 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) [2022-03-19 03:17:17,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 03:17:17,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:17:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:17:17,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-19 03:17:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:17:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 71 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-19 03:17:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:17:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-19 03:17:19,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:17:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795143542] [2022-03-19 03:17:19,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:17:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992703632] [2022-03-19 03:17:19,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992703632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:17:19,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:17:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-19 03:17:19,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:17:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1735456512] [2022-03-19 03:17:19,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1735456512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:17:19,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:17:19,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 03:17:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733554564] [2022-03-19 03:17:19,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:17:19,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 03:17:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 03:17:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-03-19 03:17:19,133 INFO L87 Difference]: Start difference. First operand 930 states and 1342 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 03:17:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:17:19,976 INFO L93 Difference]: Finished difference Result 1026 states and 1469 transitions. [2022-03-19 03:17:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:17:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 113 [2022-03-19 03:17:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:17:19,981 INFO L225 Difference]: With dead ends: 1026 [2022-03-19 03:17:19,981 INFO L226 Difference]: Without dead ends: 1024 [2022-03-19 03:17:19,981 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-19 03:17:19,981 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 79 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:17:19,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 651 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:17:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-19 03:17:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1010. [2022-03-19 03:17:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 561 states have (on average 1.2245989304812834) internal successors, (687), 563 states have internal predecessors, (687), 384 states have call successors, (384), 65 states have call predecessors, (384), 64 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-19 03:17:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1453 transitions. [2022-03-19 03:17:20,216 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1453 transitions. Word has length 113 [2022-03-19 03:17:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:17:20,216 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1453 transitions. [2022-03-19 03:17:20,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-19 03:17:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1453 transitions. [2022-03-19 03:17:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 03:17:20,218 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:17:20,218 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:17:20,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 03:17:20,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 03:17:20,431 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:17:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:17:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 3 times [2022-03-19 03:17:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:17:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308878388] [2022-03-19 03:17:20,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:17:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 4 times [2022-03-19 03:17:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:17:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185461329] [2022-03-19 03:17:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:17:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:17:20,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:17:20,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026135283] [2022-03-19 03:17:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:17:20,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:17:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:17:20,438 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) [2022-03-19 03:17:20,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 03:17:20,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:17:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:17:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-19 03:17:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:17:21,521 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:21,544 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:21,788 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:22,683 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:25,820 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:26,706 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:27,739 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:28,891 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:31,817 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:32,794 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:40,055 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:41,027 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:41,969 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:46,152 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:46,155 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:17:50,446 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* (- 1) c_main_~q~0 c_main_~x~0) c_main_~x~0))) (let ((.cse0 (* (div .cse1 c_main_~x~0) c_main_~x~0))) (and (not (<= (+ (* 2 c_main_~y~0) (* .cse0 2)) c_main_~x~0)) (= (mod .cse1 c_main_~x~0) 0) (not (= c_main_~x~0 0)) (= (+ c_main_~s~0 1) 0) (exists ((aux_div_main_~k~0_31 Int)) (let ((.cse5 (* aux_div_main_~k~0_31 c_main_~x~0))) (let ((.cse4 (div (+ (* (- 1) c_main_~q~0 c_main_~x~0) c_main_~x~0) c_main_~x~0)) (.cse2 (div (+ (* (- 1) c_main_~x~0) .cse5) c_main_~x~0))) (and (let ((.cse3 (+ c_main_~q~0 .cse4))) (= (* 2 (* .cse2 .cse3)) (+ (* (* .cse3 aux_div_main_~k~0_31) 2) .cse4))) (< (+ (* .cse4 c_main_~x~0) (* 2 (* .cse2 c_main_~x~0)) (* 2 (* c_main_~q~0 aux_div_main_~k~0_31 c_main_~x~0)) c_main_~y~0 (* (* .cse4 aux_div_main_~k~0_31 c_main_~x~0) 2)) (+ (* 2 .cse5) (* 2 (* .cse2 c_main_~q~0 c_main_~x~0)) (* 2 (* .cse2 .cse4 c_main_~x~0)) c_main_~x~0)) (<= 1 aux_div_main_~k~0_31) (< (* .cse2 2) 2))))) (= (+ (* (- 1) c_main_~y~0) c_main_~x~0 (* (- 1) .cse0)) c_main_~b~0)))) is different from true [2022-03-19 03:17:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 90 proven. 126 refuted. 0 times theorem prover too weak. 196 trivial. 3 not checked. [2022-03-19 03:17:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:18:31,863 WARN L232 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:18:44,638 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (* 2 c_main_~d~0))) (let ((.cse5 (+ .cse4 c_main_~k~0))) (let ((.cse2 (* (- 1) c_main_~q~0 .cse5)) (.cse3 (* c_main_~s~0 .cse5)) (.cse0 (* c_main_~b~0 .cse4)) (.cse1 (* c_main_~b~0 c_main_~d~0))) (or (not (= .cse0 (* 2 c_main_~v~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (<= (* 2 c_main_~c~0) (+ c_main_~b~0 (* .cse1 4))) (= (+ (* c_main_~x~0 (+ (* (- 1) .cse2) c_main_~q~0 (* (- 1) c_main_~p~0))) (* (+ .cse3 c_main_~s~0 (* (- 1) c_main_~r~0)) c_main_~y~0)) (+ c_main_~b~0 (* (- 1) c_main_~c~0) .cse0)) (not (= (+ (* (+ .cse2 c_main_~p~0) c_main_~x~0) (* (+ (* .cse3 (- 1)) c_main_~r~0) c_main_~y~0)) (+ (* (- 1) .cse0) c_main_~c~0))) (<= (+ (* 2 .cse1) c_main_~b~0) c_main_~c~0))))) is different from true [2022-03-19 03:18:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 116 proven. 81 refuted. 0 times theorem prover too weak. 212 trivial. 6 not checked. [2022-03-19 03:18:57,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:18:57,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185461329] [2022-03-19 03:18:57,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:18:57,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026135283] [2022-03-19 03:18:57,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026135283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:18:57,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:18:57,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 40 [2022-03-19 03:18:57,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:18:57,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308878388] [2022-03-19 03:18:57,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308878388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:18:57,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:18:57,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:18:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187211523] [2022-03-19 03:18:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:18:57,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:18:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:18:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:18:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1144, Unknown=7, NotChecked=146, Total=1560 [2022-03-19 03:18:57,251 INFO L87 Difference]: Start difference. First operand 1010 states and 1453 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-19 03:19:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:02,308 INFO L93 Difference]: Finished difference Result 1048 states and 1497 transitions. [2022-03-19 03:19:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 03:19:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 118 [2022-03-19 03:19:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:02,313 INFO L225 Difference]: With dead ends: 1048 [2022-03-19 03:19:02,313 INFO L226 Difference]: Without dead ends: 1046 [2022-03-19 03:19:02,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=337, Invalid=1556, Unknown=7, NotChecked=170, Total=2070 [2022-03-19 03:19:02,314 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:02,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 988 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 735 Invalid, 0 Unknown, 423 Unchecked, 1.4s Time] [2022-03-19 03:19:02,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-19 03:19:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1036. [2022-03-19 03:19:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 580 states have (on average 1.2189655172413794) internal successors, (707), 583 states have internal predecessors, (707), 390 states have call successors, (390), 66 states have call predecessors, (390), 65 states have return successors, (388), 386 states have call predecessors, (388), 388 states have call successors, (388) [2022-03-19 03:19:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-03-19 03:19:02,578 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 118 [2022-03-19 03:19:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:02,578 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-03-19 03:19:02,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-19 03:19:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-03-19 03:19:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 03:19:02,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:02,580 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:02,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:02,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 03:19:02,781 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 17 times [2022-03-19 03:19:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:02,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93368489] [2022-03-19 03:19:02,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 18 times [2022-03-19 03:19:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:02,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422553463] [2022-03-19 03:19:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:02,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:02,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004495877] [2022-03-19 03:19:02,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:19:02,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:02,788 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) [2022-03-19 03:19:02,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 03:19:02,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 03:19:02,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 03:19:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-19 03:19:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-19 03:19:03,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:19:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422553463] [2022-03-19 03:19:03,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:19:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004495877] [2022-03-19 03:19:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004495877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:19:03,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:19:03,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 03:19:03,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:19:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93368489] [2022-03-19 03:19:03,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93368489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:19:03,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:19:03,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 03:19:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802779018] [2022-03-19 03:19:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:19:03,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 03:19:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 03:19:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:19:03,418 INFO L87 Difference]: Start difference. First operand 1036 states and 1485 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 03:19:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:04,041 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-19 03:19:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:19:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 122 [2022-03-19 03:19:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:04,047 INFO L225 Difference]: With dead ends: 1668 [2022-03-19 03:19:04,047 INFO L226 Difference]: Without dead ends: 1176 [2022-03-19 03:19:04,049 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:19:04,049 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:04,049 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 223 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:19:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-19 03:19:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2022-03-19 03:19:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 616 states have (on average 1.2077922077922079) internal successors, (744), 641 states have internal predecessors, (744), 400 states have call successors, (400), 63 states have call predecessors, (400), 62 states have return successors, (398), 374 states have call predecessors, (398), 398 states have call successors, (398) [2022-03-19 03:19:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1542 transitions. [2022-03-19 03:19:04,362 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1542 transitions. Word has length 122 [2022-03-19 03:19:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:04,362 INFO L478 AbstractCegarLoop]: Abstraction has 1079 states and 1542 transitions. [2022-03-19 03:19:04,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 03:19:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1542 transitions. [2022-03-19 03:19:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 03:19:04,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:04,364 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:04,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:04,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 03:19:04,579 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 19 times [2022-03-19 03:19:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:04,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486916525] [2022-03-19 03:19:04,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 20 times [2022-03-19 03:19:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:04,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356941109] [2022-03-19 03:19:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:04,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:04,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663725869] [2022-03-19 03:19:04,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:19:04,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:04,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:04,603 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) [2022-03-19 03:19:04,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 03:19:04,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:19:04,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 03:19:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 03:19:07,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:10,387 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:19:10,389 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:19:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 03:19:14,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:19:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356941109] [2022-03-19 03:19:14,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:19:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663725869] [2022-03-19 03:19:14,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663725869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:19:14,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:19:14,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-19 03:19:14,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:19:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486916525] [2022-03-19 03:19:14,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486916525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:19:14,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:19:14,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 03:19:14,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406386174] [2022-03-19 03:19:14,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:19:14,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 03:19:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 03:19:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-03-19 03:19:14,501 INFO L87 Difference]: Start difference. First operand 1079 states and 1542 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:19:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:17,242 INFO L93 Difference]: Finished difference Result 1207 states and 1726 transitions. [2022-03-19 03:19:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 03:19:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 122 [2022-03-19 03:19:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:17,247 INFO L225 Difference]: With dead ends: 1207 [2022-03-19 03:19:17,248 INFO L226 Difference]: Without dead ends: 1204 [2022-03-19 03:19:17,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 03:19:17,249 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 58 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:17,249 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 483 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 03:19:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-19 03:19:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1118. [2022-03-19 03:19:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 636 states have (on average 1.2091194968553458) internal successors, (769), 661 states have internal predecessors, (769), 416 states have call successors, (416), 66 states have call predecessors, (416), 65 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-19 03:19:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1599 transitions. [2022-03-19 03:19:17,549 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1599 transitions. Word has length 122 [2022-03-19 03:19:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:17,549 INFO L478 AbstractCegarLoop]: Abstraction has 1118 states and 1599 transitions. [2022-03-19 03:19:17,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:19:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1599 transitions. [2022-03-19 03:19:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 03:19:17,551 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:17,551 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:17,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:17,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:17,752 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 21 times [2022-03-19 03:19:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1747524465] [2022-03-19 03:19:17,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 22 times [2022-03-19 03:19:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:17,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131321540] [2022-03-19 03:19:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:17,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:17,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940704537] [2022-03-19 03:19:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:19:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:17,759 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) [2022-03-19 03:19:17,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 03:19:17,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:19:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 03:19:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 139 proven. 89 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-19 03:19:20,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 149 proven. 47 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-19 03:19:36,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:19:36,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131321540] [2022-03-19 03:19:36,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:19:36,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940704537] [2022-03-19 03:19:36,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940704537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:19:36,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:19:36,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-19 03:19:36,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:19:36,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1747524465] [2022-03-19 03:19:36,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1747524465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:19:36,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:19:36,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 03:19:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505275403] [2022-03-19 03:19:36,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:19:36,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 03:19:36,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 03:19:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 03:19:36,055 INFO L87 Difference]: Start difference. First operand 1118 states and 1599 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:19:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:39,734 INFO L93 Difference]: Finished difference Result 1243 states and 1785 transitions. [2022-03-19 03:19:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 03:19:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 124 [2022-03-19 03:19:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:39,739 INFO L225 Difference]: With dead ends: 1243 [2022-03-19 03:19:39,739 INFO L226 Difference]: Without dead ends: 1240 [2022-03-19 03:19:39,740 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 03:19:39,740 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 96 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:39,740 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 568 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 03:19:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-19 03:19:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1128. [2022-03-19 03:19:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 641 states have (on average 1.2090483619344774) internal successors, (775), 666 states have internal predecessors, (775), 420 states have call successors, (420), 67 states have call predecessors, (420), 66 states have return successors, (418), 394 states have call predecessors, (418), 418 states have call successors, (418) [2022-03-19 03:19:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1613 transitions. [2022-03-19 03:19:40,067 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1613 transitions. Word has length 124 [2022-03-19 03:19:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:40,067 INFO L478 AbstractCegarLoop]: Abstraction has 1128 states and 1613 transitions. [2022-03-19 03:19:40,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:19:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1613 transitions. [2022-03-19 03:19:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 03:19:40,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:40,069 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:40,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:40,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 03:19:40,283 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 11 times [2022-03-19 03:19:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157931647] [2022-03-19 03:19:40,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 12 times [2022-03-19 03:19:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718624367] [2022-03-19 03:19:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:40,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458375444] [2022-03-19 03:19:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:19:40,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:40,290 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) [2022-03-19 03:19:40,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 03:19:40,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 03:19:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:19:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-19 03:19:40,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:19:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718624367] [2022-03-19 03:19:45,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:19:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458375444] [2022-03-19 03:19:45,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458375444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:19:45,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:19:45,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-19 03:19:45,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:19:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157931647] [2022-03-19 03:19:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157931647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:19:45,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:19:45,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:19:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801604135] [2022-03-19 03:19:45,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:19:45,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:19:45,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:19:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:19:45,315 INFO L87 Difference]: Start difference. First operand 1128 states and 1613 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 03:19:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:46,603 INFO L93 Difference]: Finished difference Result 1166 states and 1653 transitions. [2022-03-19 03:19:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:19:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-03-19 03:19:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:46,608 INFO L225 Difference]: With dead ends: 1166 [2022-03-19 03:19:46,608 INFO L226 Difference]: Without dead ends: 1164 [2022-03-19 03:19:46,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:19:46,609 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:46,609 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 202 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:19:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-03-19 03:19:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1111. [2022-03-19 03:19:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 628 states have (on average 1.2117834394904459) internal successors, (761), 653 states have internal predecessors, (761), 416 states have call successors, (416), 67 states have call predecessors, (416), 66 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-19 03:19:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1591 transitions. [2022-03-19 03:19:46,934 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1591 transitions. Word has length 121 [2022-03-19 03:19:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:46,934 INFO L478 AbstractCegarLoop]: Abstraction has 1111 states and 1591 transitions. [2022-03-19 03:19:46,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 03:19:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1591 transitions. [2022-03-19 03:19:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 03:19:46,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:46,936 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:46,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:47,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:47,151 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 23 times [2022-03-19 03:19:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319145529] [2022-03-19 03:19:47,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 24 times [2022-03-19 03:19:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643235155] [2022-03-19 03:19:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:47,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:47,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:47,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252176755] [2022-03-19 03:19:47,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:19:47,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:47,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:47,159 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) [2022-03-19 03:19:47,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 03:19:47,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 03:19:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-19 03:19:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 03:19:49,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:19:52,583 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:19:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:19:53,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643235155] [2022-03-19 03:19:53,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:19:53,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252176755] [2022-03-19 03:19:53,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252176755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:19:53,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:19:53,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-19 03:19:53,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:19:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319145529] [2022-03-19 03:19:53,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319145529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:19:53,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:19:53,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 03:19:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715881491] [2022-03-19 03:19:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:19:53,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 03:19:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 03:19:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-19 03:19:53,492 INFO L87 Difference]: Start difference. First operand 1111 states and 1591 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 03:19:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:19:57,845 INFO L93 Difference]: Finished difference Result 1237 states and 1772 transitions. [2022-03-19 03:19:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 03:19:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 127 [2022-03-19 03:19:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:19:57,851 INFO L225 Difference]: With dead ends: 1237 [2022-03-19 03:19:57,851 INFO L226 Difference]: Without dead ends: 1234 [2022-03-19 03:19:57,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 03:19:57,852 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 74 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:19:57,852 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 721 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 03:19:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-19 03:19:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1140. [2022-03-19 03:19:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 643 states have (on average 1.213063763608087) internal successors, (780), 668 states have internal predecessors, (780), 428 states have call successors, (428), 69 states have call predecessors, (428), 68 states have return successors, (426), 402 states have call predecessors, (426), 426 states have call successors, (426) [2022-03-19 03:19:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1634 transitions. [2022-03-19 03:19:58,194 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1634 transitions. Word has length 127 [2022-03-19 03:19:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:19:58,195 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1634 transitions. [2022-03-19 03:19:58,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-19 03:19:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1634 transitions. [2022-03-19 03:19:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 03:19:58,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:19:58,197 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:19:58,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 03:19:58,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:58,411 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:19:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:19:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 25 times [2022-03-19 03:19:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:19:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797477996] [2022-03-19 03:19:58,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:19:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 26 times [2022-03-19 03:19:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:19:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936661380] [2022-03-19 03:19:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:19:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:19:58,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:19:58,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801057776] [2022-03-19 03:19:58,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:19:58,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:19:58,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:19:58,418 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) [2022-03-19 03:19:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 03:19:58,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:19:58,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:19:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 03:19:58,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:19:59,086 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:19:59,088 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:20:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 03:20:02,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:20:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-03-19 03:20:10,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:20:10,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936661380] [2022-03-19 03:20:10,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:20:10,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801057776] [2022-03-19 03:20:10,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801057776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:20:10,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:20:10,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-19 03:20:10,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:20:10,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797477996] [2022-03-19 03:20:10,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797477996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:20:10,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:20:10,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:20:10,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181262224] [2022-03-19 03:20:10,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:20:10,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:20:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:20:10,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:20:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-19 03:20:10,827 INFO L87 Difference]: Start difference. First operand 1140 states and 1634 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:20:14,241 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 [] [2022-03-19 03:20:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:20:17,906 INFO L93 Difference]: Finished difference Result 1268 states and 1824 transitions. [2022-03-19 03:20:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 03:20:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-19 03:20:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:20:17,912 INFO L225 Difference]: With dead ends: 1268 [2022-03-19 03:20:17,912 INFO L226 Difference]: Without dead ends: 1265 [2022-03-19 03:20:17,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 03:20:17,912 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:20:17,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 721 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1193 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-03-19 03:20:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-03-19 03:20:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-03-19 03:20:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 694 states have (on average 1.217579250720461) internal successors, (845), 721 states have internal predecessors, (845), 472 states have call successors, (472), 73 states have call predecessors, (472), 72 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-19 03:20:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1787 transitions. [2022-03-19 03:20:18,280 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1787 transitions. Word has length 127 [2022-03-19 03:20:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:20:18,280 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1787 transitions. [2022-03-19 03:20:18,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:20:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1787 transitions. [2022-03-19 03:20:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 03:20:18,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:20:18,282 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:20:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 03:20:18,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 03:20:18,502 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:20:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:20:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 27 times [2022-03-19 03:20:18,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:20:18,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1260184134] [2022-03-19 03:20:18,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:20:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 28 times [2022-03-19 03:20:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:20:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987934417] [2022-03-19 03:20:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:20:18,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:20:18,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:20:18,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172238185] [2022-03-19 03:20:18,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:20:18,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:20:18,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:20:18,510 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) [2022-03-19 03:20:18,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 03:20:18,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:20:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:20:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-19 03:20:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:20:19,862 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:20:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 137 proven. 134 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-19 03:20:22,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:20:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 178 proven. 17 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-03-19 03:20:32,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:20:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987934417] [2022-03-19 03:20:32,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:20:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172238185] [2022-03-19 03:20:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172238185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:20:32,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:20:32,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2022-03-19 03:20:32,245 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:20:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1260184134] [2022-03-19 03:20:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1260184134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:20:32,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:20:32,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 03:20:32,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679501645] [2022-03-19 03:20:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:20:32,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 03:20:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:20:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 03:20:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 03:20:32,246 INFO L87 Difference]: Start difference. First operand 1239 states and 1787 transitions. Second operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:20:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:20:39,386 INFO L93 Difference]: Finished difference Result 1339 states and 1928 transitions. [2022-03-19 03:20:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 03:20:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-19 03:20:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:20:39,393 INFO L225 Difference]: With dead ends: 1339 [2022-03-19 03:20:39,393 INFO L226 Difference]: Without dead ends: 1336 [2022-03-19 03:20:39,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 03:20:39,394 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 105 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:20:39,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 772 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-19 03:20:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-19 03:20:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1243. [2022-03-19 03:20:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 697 states have (on average 1.2166427546628407) internal successors, (848), 724 states have internal predecessors, (848), 472 states have call successors, (472), 74 states have call predecessors, (472), 73 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-19 03:20:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1790 transitions. [2022-03-19 03:20:39,781 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1790 transitions. Word has length 127 [2022-03-19 03:20:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:20:39,781 INFO L478 AbstractCegarLoop]: Abstraction has 1243 states and 1790 transitions. [2022-03-19 03:20:39,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:20:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1790 transitions. [2022-03-19 03:20:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-19 03:20:39,783 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:20:39,783 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:20:39,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 03:20:40,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 03:20:40,000 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:20:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:20:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 29 times [2022-03-19 03:20:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:20:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975999589] [2022-03-19 03:20:40,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:20:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 30 times [2022-03-19 03:20:40,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:20:40,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913090564] [2022-03-19 03:20:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:20:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:20:40,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:20:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603809183] [2022-03-19 03:20:40,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:20:40,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:20:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:20:40,009 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) [2022-03-19 03:20:40,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 03:20:40,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 03:20:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:20:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 03:20:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:20:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 03:20:43,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:20:51,071 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:21:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 156 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 03:21:23,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:21:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913090564] [2022-03-19 03:21:23,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:21:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603809183] [2022-03-19 03:21:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603809183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:21:23,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:21:23,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2022-03-19 03:21:23,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:21:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975999589] [2022-03-19 03:21:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975999589] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:21:23,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:21:23,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 03:21:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519318916] [2022-03-19 03:21:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:21:23,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 03:21:23,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:21:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 03:21:23,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1247, Unknown=3, NotChecked=0, Total=1560 [2022-03-19 03:21:23,666 INFO L87 Difference]: Start difference. First operand 1243 states and 1790 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:21:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:21:26,942 INFO L93 Difference]: Finished difference Result 1350 states and 1938 transitions. [2022-03-19 03:21:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:21:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 130 [2022-03-19 03:21:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:21:26,948 INFO L225 Difference]: With dead ends: 1350 [2022-03-19 03:21:26,948 INFO L226 Difference]: Without dead ends: 1347 [2022-03-19 03:21:26,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=457, Invalid=1892, Unknown=3, NotChecked=0, Total=2352 [2022-03-19 03:21:26,949 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 81 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:21:26,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 742 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 03:21:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-03-19 03:21:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1248. [2022-03-19 03:21:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 700 states have (on average 1.2157142857142857) internal successors, (851), 727 states have internal predecessors, (851), 473 states have call successors, (473), 75 states have call predecessors, (473), 74 states have return successors, (471), 445 states have call predecessors, (471), 471 states have call successors, (471) [2022-03-19 03:21:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1795 transitions. [2022-03-19 03:21:27,352 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1795 transitions. Word has length 130 [2022-03-19 03:21:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:21:27,352 INFO L478 AbstractCegarLoop]: Abstraction has 1248 states and 1795 transitions. [2022-03-19 03:21:27,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:21:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1795 transitions. [2022-03-19 03:21:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 03:21:27,354 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:21:27,354 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:21:27,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 03:21:27,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 03:21:27,576 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:21:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:21:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 31 times [2022-03-19 03:21:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:21:27,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805175229] [2022-03-19 03:21:27,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:21:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 32 times [2022-03-19 03:21:27,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:21:27,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798415430] [2022-03-19 03:21:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:21:27,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:21:27,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:21:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044919499] [2022-03-19 03:21:27,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:21:27,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:21:27,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:21:27,584 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) [2022-03-19 03:21:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 03:21:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:21:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:21:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 03:21:27,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:21:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 107 proven. 114 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-19 03:21:31,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:21:35,477 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:21:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:21:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798415430] [2022-03-19 03:21:37,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:21:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044919499] [2022-03-19 03:21:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044919499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:21:37,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:21:37,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-19 03:21:37,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:21:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805175229] [2022-03-19 03:21:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805175229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:21:37,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:21:37,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 03:21:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064408621] [2022-03-19 03:21:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:21:37,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 03:21:37,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:21:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 03:21:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=772, Unknown=1, NotChecked=0, Total=870 [2022-03-19 03:21:37,493 INFO L87 Difference]: Start difference. First operand 1248 states and 1795 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:21:43,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:21:43,967 INFO L93 Difference]: Finished difference Result 1389 states and 2002 transitions. [2022-03-19 03:21:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 03:21:43,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 132 [2022-03-19 03:21:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:21:43,973 INFO L225 Difference]: With dead ends: 1389 [2022-03-19 03:21:43,973 INFO L226 Difference]: Without dead ends: 1386 [2022-03-19 03:21:43,974 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=212, Invalid=1767, Unknown=1, NotChecked=0, Total=1980 [2022-03-19 03:21:43,974 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 95 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:21:43,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-19 03:21:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-03-19 03:21:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1343. [2022-03-19 03:21:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 748 states have (on average 1.2205882352941178) internal successors, (913), 777 states have internal predecessors, (913), 517 states have call successors, (517), 78 states have call predecessors, (517), 77 states have return successors, (515), 487 states have call predecessors, (515), 515 states have call successors, (515) [2022-03-19 03:21:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1945 transitions. [2022-03-19 03:21:44,404 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1945 transitions. Word has length 132 [2022-03-19 03:21:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:21:44,404 INFO L478 AbstractCegarLoop]: Abstraction has 1343 states and 1945 transitions. [2022-03-19 03:21:44,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:21:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1945 transitions. [2022-03-19 03:21:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 03:21:44,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:21:44,406 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:21:44,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 03:21:44,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:21:44,622 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:21:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:21:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 33 times [2022-03-19 03:21:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:21:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305272361] [2022-03-19 03:21:44,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:21:44,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 34 times [2022-03-19 03:21:44,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:21:44,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476644997] [2022-03-19 03:21:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:21:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:21:44,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:21:44,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253653539] [2022-03-19 03:21:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:21:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:21:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:21:44,630 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) [2022-03-19 03:21:44,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 03:21:44,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:21:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:21:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-19 03:21:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:21:45,911 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:22:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 162 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 03:22:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:22:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-03-19 03:22:25,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:22:25,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476644997] [2022-03-19 03:22:25,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:22:25,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253653539] [2022-03-19 03:22:25,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253653539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:22:25,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:22:25,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-03-19 03:22:25,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:22:25,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305272361] [2022-03-19 03:22:25,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305272361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:22:25,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:22:25,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:22:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859905367] [2022-03-19 03:22:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:22:25,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:22:25,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:22:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1128, Unknown=2, NotChecked=0, Total=1332 [2022-03-19 03:22:25,900 INFO L87 Difference]: Start difference. First operand 1343 states and 1945 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:22:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:22:39,783 INFO L93 Difference]: Finished difference Result 1394 states and 2012 transitions. [2022-03-19 03:22:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 03:22:39,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 132 [2022-03-19 03:22:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:22:39,788 INFO L225 Difference]: With dead ends: 1394 [2022-03-19 03:22:39,788 INFO L226 Difference]: Without dead ends: 1387 [2022-03-19 03:22:39,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=254, Invalid=1550, Unknown=2, NotChecked=0, Total=1806 [2022-03-19 03:22:39,789 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 69 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:22:39,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1163 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 560 Invalid, 0 Unknown, 639 Unchecked, 1.0s Time] [2022-03-19 03:22:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-19 03:22:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1366. [2022-03-19 03:22:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 763 states have (on average 1.2201834862385321) internal successors, (931), 792 states have internal predecessors, (931), 525 states have call successors, (525), 78 states have call predecessors, (525), 77 states have return successors, (523), 495 states have call predecessors, (523), 523 states have call successors, (523) [2022-03-19 03:22:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1979 transitions. [2022-03-19 03:22:40,293 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1979 transitions. Word has length 132 [2022-03-19 03:22:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:22:40,293 INFO L478 AbstractCegarLoop]: Abstraction has 1366 states and 1979 transitions. [2022-03-19 03:22:40,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:22:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1979 transitions. [2022-03-19 03:22:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 03:22:40,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:22:40,296 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:22:40,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 03:22:40,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 03:22:40,511 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:22:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:22:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 35 times [2022-03-19 03:22:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1100289149] [2022-03-19 03:22:40,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:22:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 36 times [2022-03-19 03:22:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:22:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207218692] [2022-03-19 03:22:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:22:40,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:22:40,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:22:40,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137043917] [2022-03-19 03:22:40,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:22:40,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:22:40,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:22:40,520 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) [2022-03-19 03:22:40,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 03:22:40,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 03:22:40,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:22:40,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-19 03:22:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:22:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-19 03:22:46,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:22:53,434 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:22:57,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:22:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207218692] [2022-03-19 03:22:57,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:22:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137043917] [2022-03-19 03:22:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137043917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:22:57,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:22:57,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-19 03:22:57,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:22:57,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1100289149] [2022-03-19 03:22:57,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1100289149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:22:57,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:22:57,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 03:22:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20420609] [2022-03-19 03:22:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:22:57,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 03:22:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:22:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 03:22:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 03:22:57,084 INFO L87 Difference]: Start difference. First operand 1366 states and 1979 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:23:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:23:05,287 INFO L93 Difference]: Finished difference Result 1491 states and 2148 transitions. [2022-03-19 03:23:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 03:23:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 135 [2022-03-19 03:23:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:23:05,293 INFO L225 Difference]: With dead ends: 1491 [2022-03-19 03:23:05,294 INFO L226 Difference]: Without dead ends: 1488 [2022-03-19 03:23:05,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 03:23:05,295 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 111 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:23:05,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1051 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-19 03:23:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-03-19 03:23:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1448. [2022-03-19 03:23:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 810 states have (on average 1.2185185185185186) internal successors, (987), 840 states have internal predecessors, (987), 555 states have call successors, (555), 83 states have call predecessors, (555), 82 states have return successors, (553), 524 states have call predecessors, (553), 553 states have call successors, (553) [2022-03-19 03:23:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2095 transitions. [2022-03-19 03:23:05,848 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2095 transitions. Word has length 135 [2022-03-19 03:23:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:23:05,848 INFO L478 AbstractCegarLoop]: Abstraction has 1448 states and 2095 transitions. [2022-03-19 03:23:05,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 03:23:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2095 transitions. [2022-03-19 03:23:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 03:23:05,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:05,851 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:23:05,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 03:23:06,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 03:23:06,067 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 37 times [2022-03-19 03:23:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1255777772] [2022-03-19 03:23:06,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:23:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 38 times [2022-03-19 03:23:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:06,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322933996] [2022-03-19 03:23:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:06,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:23:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189886] [2022-03-19 03:23:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:23:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:23:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:06,088 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) [2022-03-19 03:23:06,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 03:23:06,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:23:06,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:23:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-19 03:23:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:23:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 99 proven. 182 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-19 03:23:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:23:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 170 proven. 52 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-19 03:23:15,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:23:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322933996] [2022-03-19 03:23:15,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:23:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189886] [2022-03-19 03:23:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:23:15,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:23:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-19 03:23:15,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:23:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1255777772] [2022-03-19 03:23:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1255777772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:23:15,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:23:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 03:23:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023850838] [2022-03-19 03:23:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:23:15,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 03:23:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 03:23:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=936, Unknown=1, NotChecked=0, Total=1122 [2022-03-19 03:23:15,683 INFO L87 Difference]: Start difference. First operand 1448 states and 2095 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:23:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:23:20,139 INFO L93 Difference]: Finished difference Result 1574 states and 2264 transitions. [2022-03-19 03:23:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 03:23:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 135 [2022-03-19 03:23:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:23:20,144 INFO L225 Difference]: With dead ends: 1574 [2022-03-19 03:23:20,144 INFO L226 Difference]: Without dead ends: 1571 [2022-03-19 03:23:20,145 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=320, Invalid=1659, Unknown=1, NotChecked=0, Total=1980 [2022-03-19 03:23:20,145 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 95 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:23:20,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 902 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 03:23:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-03-19 03:23:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1524. [2022-03-19 03:23:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 853 states have (on average 1.2180539273153577) internal successors, (1039), 885 states have internal predecessors, (1039), 583 states have call successors, (583), 88 states have call predecessors, (583), 87 states have return successors, (581), 550 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-19 03:23:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2203 transitions. [2022-03-19 03:23:20,749 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2203 transitions. Word has length 135 [2022-03-19 03:23:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:23:20,750 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 2203 transitions. [2022-03-19 03:23:20,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 03:23:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2203 transitions. [2022-03-19 03:23:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 03:23:20,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:20,752 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:23:20,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 03:23:20,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 03:23:20,955 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 5 times [2022-03-19 03:23:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:20,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156348853] [2022-03-19 03:23:20,955 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:23:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 6 times [2022-03-19 03:23:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498284630] [2022-03-19 03:23:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:20,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:23:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552142465] [2022-03-19 03:23:20,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:23:20,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:23:20,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:20,965 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) [2022-03-19 03:23:20,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 03:23:21,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 03:23:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:23:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 03:23:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:23:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-19 03:23:22,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:23:24,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:23:24,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498284630] [2022-03-19 03:23:24,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:23:24,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552142465] [2022-03-19 03:23:24,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552142465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:23:24,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:23:24,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 03:23:24,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:23:24,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156348853] [2022-03-19 03:23:24,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156348853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:23:24,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:23:24,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:23:24,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191714051] [2022-03-19 03:23:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:23:24,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:23:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:23:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:23:24,429 INFO L87 Difference]: Start difference. First operand 1524 states and 2203 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 03:23:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:23:43,711 INFO L93 Difference]: Finished difference Result 1693 states and 2444 transitions. [2022-03-19 03:23:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 03:23:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 140 [2022-03-19 03:23:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:23:43,716 INFO L225 Difference]: With dead ends: 1693 [2022-03-19 03:23:43,716 INFO L226 Difference]: Without dead ends: 1691 [2022-03-19 03:23:43,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 142 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=259, Invalid=1142, Unknown=5, NotChecked=0, Total=1406 [2022-03-19 03:23:43,716 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 69 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:23:43,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 455 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 523 Invalid, 0 Unknown, 67 Unchecked, 1.4s Time] [2022-03-19 03:23:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-19 03:23:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1652. [2022-03-19 03:23:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 922 states have (on average 1.2201735357917571) internal successors, (1125), 959 states have internal predecessors, (1125), 636 states have call successors, (636), 94 states have call predecessors, (636), 93 states have return successors, (634), 598 states have call predecessors, (634), 634 states have call successors, (634) [2022-03-19 03:23:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2395 transitions. [2022-03-19 03:23:44,418 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2395 transitions. Word has length 140 [2022-03-19 03:23:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:23:44,418 INFO L478 AbstractCegarLoop]: Abstraction has 1652 states and 2395 transitions. [2022-03-19 03:23:44,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-19 03:23:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2395 transitions. [2022-03-19 03:23:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-19 03:23:44,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:23:44,420 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:23:44,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 03:23:44,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 03:23:44,621 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:23:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:23:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 39 times [2022-03-19 03:23:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189037615] [2022-03-19 03:23:44,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:23:44,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 40 times [2022-03-19 03:23:44,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:23:44,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955620866] [2022-03-19 03:23:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:23:44,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:23:44,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:23:44,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815858729] [2022-03-19 03:23:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:23:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:23:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:23:44,628 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) [2022-03-19 03:23:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 03:23:44,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:23:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:23:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-19 03:23:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:23:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 03:23:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:23:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-19 03:23:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:23:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955620866] [2022-03-19 03:23:54,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:23:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815858729] [2022-03-19 03:23:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815858729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:23:54,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:23:54,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 34 [2022-03-19 03:23:54,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:23:54,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189037615] [2022-03-19 03:23:54,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189037615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:23:54,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:23:54,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:23:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912661360] [2022-03-19 03:23:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:23:54,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:23:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:23:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:23:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1014, Unknown=1, NotChecked=0, Total=1122 [2022-03-19 03:23:54,451 INFO L87 Difference]: Start difference. First operand 1652 states and 2395 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:24:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:03,703 INFO L93 Difference]: Finished difference Result 1861 states and 2684 transitions. [2022-03-19 03:24:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 03:24:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 140 [2022-03-19 03:24:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:03,710 INFO L225 Difference]: With dead ends: 1861 [2022-03-19 03:24:03,710 INFO L226 Difference]: Without dead ends: 1854 [2022-03-19 03:24:03,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=199, Invalid=1962, Unknown=1, NotChecked=0, Total=2162 [2022-03-19 03:24:03,711 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 113 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:03,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1313 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-19 03:24:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-03-19 03:24:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1770. [2022-03-19 03:24:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 990 states have (on average 1.2181818181818183) internal successors, (1206), 1031 states have internal predecessors, (1206), 679 states have call successors, (679), 101 states have call predecessors, (679), 100 states have return successors, (677), 637 states have call predecessors, (677), 677 states have call successors, (677) [2022-03-19 03:24:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2562 transitions. [2022-03-19 03:24:04,532 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2562 transitions. Word has length 140 [2022-03-19 03:24:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:04,532 INFO L478 AbstractCegarLoop]: Abstraction has 1770 states and 2562 transitions. [2022-03-19 03:24:04,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 03:24:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2562 transitions. [2022-03-19 03:24:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 03:24:04,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:04,535 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:04,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 03:24:04,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:04,751 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 41 times [2022-03-19 03:24:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804001361] [2022-03-19 03:24:04,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:24:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 42 times [2022-03-19 03:24:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467761539] [2022-03-19 03:24:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:04,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:04,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321327447] [2022-03-19 03:24:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:24:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:04,759 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) [2022-03-19 03:24:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 03:24:04,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-19 03:24:04,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 03:24:04,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:24:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-19 03:24:07,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:24:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-19 03:24:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:24:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467761539] [2022-03-19 03:24:15,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:24:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321327447] [2022-03-19 03:24:15,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321327447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:24:15,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:24:15,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-03-19 03:24:15,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:24:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804001361] [2022-03-19 03:24:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804001361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:24:15,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:24:15,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 03:24:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104136701] [2022-03-19 03:24:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:24:15,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 03:24:15,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:15,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 03:24:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 03:24:15,323 INFO L87 Difference]: Start difference. First operand 1770 states and 2562 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-19 03:24:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:24:19,089 INFO L93 Difference]: Finished difference Result 2151 states and 3104 transitions. [2022-03-19 03:24:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 03:24:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 144 [2022-03-19 03:24:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:24:19,095 INFO L225 Difference]: With dead ends: 2151 [2022-03-19 03:24:19,096 INFO L226 Difference]: Without dead ends: 1861 [2022-03-19 03:24:19,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 03:24:19,097 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 61 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:24:19,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 703 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 03:24:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-03-19 03:24:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1843. [2022-03-19 03:24:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1032 states have (on average 1.2170542635658914) internal successors, (1256), 1076 states have internal predecessors, (1256), 706 states have call successors, (706), 105 states have call predecessors, (706), 104 states have return successors, (704), 661 states have call predecessors, (704), 704 states have call successors, (704) [2022-03-19 03:24:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2666 transitions. [2022-03-19 03:24:19,911 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2666 transitions. Word has length 144 [2022-03-19 03:24:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:24:19,912 INFO L478 AbstractCegarLoop]: Abstraction has 1843 states and 2666 transitions. [2022-03-19 03:24:19,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-19 03:24:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2666 transitions. [2022-03-19 03:24:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 03:24:19,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:24:19,914 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:24:19,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 03:24:20,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:20,115 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:24:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:24:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 43 times [2022-03-19 03:24:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:24:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139488538] [2022-03-19 03:24:20,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:24:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 44 times [2022-03-19 03:24:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:24:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823311160] [2022-03-19 03:24:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:24:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:24:20,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:24:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964676630] [2022-03-19 03:24:20,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:24:20,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:24:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:24:20,122 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) [2022-03-19 03:24:20,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 03:24:20,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:24:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:24:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-19 03:24:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates...