/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-b030c9e [2022-03-20 13:42:15,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:42:15,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:42:15,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:42:15,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:42:15,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:42:15,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:42:15,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:42:15,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:42:15,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:42:15,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:42:15,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:42:15,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:42:15,823 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:42:15,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:42:15,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:42:15,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:42:15,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:42:15,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:42:15,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:42:15,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:42:15,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:42:15,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:42:15,825 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:42:16,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:42:16,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:42:16,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:42:16,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:42:16,097 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:42:16,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 13:42:16,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1263d4b8c/763adad8acd847988af86e593d71a29b/FLAG238bfe619 [2022-03-20 13:42:16,503 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:42:16,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 13:42:16,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1263d4b8c/763adad8acd847988af86e593d71a29b/FLAG238bfe619 [2022-03-20 13:42:16,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1263d4b8c/763adad8acd847988af86e593d71a29b [2022-03-20 13:42:16,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:42:16,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:42:16,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:42:16,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:42:16,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:42:16,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:42:16" (1/1) ... [2022-03-20 13:42:16,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6708b362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:16, skipping insertion in model container [2022-03-20 13:42:16,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:42:16" (1/1) ... [2022-03-20 13:42:16,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:42:16,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:42:17,086 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] [2022-03-20 13:42:17,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:42:17,121 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:42:17,134 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] [2022-03-20 13:42:17,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:42:17,160 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:42:17,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17 WrapperNode [2022-03-20 13:42:17,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:42:17,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:42:17,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:42:17,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:42:17,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:42:17,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:42:17,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:42:17,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:42:17,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (1/1) ... [2022-03-20 13:42:17,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:42:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:17,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:42:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:42:17,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:42:17,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:42:17,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:42:17,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:42:17,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:42:17,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:42:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:42:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:42:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:42:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:42:17,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:42:17,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:42:17,316 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:42:17,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:42:17,451 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:42:17,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:42:17,459 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 13:42:17,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:42:17 BoogieIcfgContainer [2022-03-20 13:42:17,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:42:17,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:42:17,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:42:17,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:42:17,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:42:16" (1/3) ... [2022-03-20 13:42:17,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec15642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:42:17, skipping insertion in model container [2022-03-20 13:42:17,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:42:17" (2/3) ... [2022-03-20 13:42:17,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec15642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:42:17, skipping insertion in model container [2022-03-20 13:42:17,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:42:17" (3/3) ... [2022-03-20 13:42:17,481 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-03-20 13:42:17,484 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:42:17,485 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:42:17,558 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:42:17,574 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:42:17,574 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:42:17,592 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) [2022-03-20 13:42:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 13:42:17,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:17,615 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:17,616 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-03-20 13:42:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335492022] [2022-03-20 13:42:17,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 2 times [2022-03-20 13:42:17,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:17,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680417349] [2022-03-20 13:42:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:17,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:17,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:42:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:17,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 13:42:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 13:42:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:42:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:42:17,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680417349] [2022-03-20 13:42:17,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680417349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:17,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:17,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:42:17,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335492022] [2022-03-20 13:42:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335492022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:17,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:42:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474225532] [2022-03-20 13:42:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:17,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:42:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:42:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:42:17,869 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) [2022-03-20 13:42:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:17,968 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-20 13:42:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:42:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 13:42:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:17,977 INFO L225 Difference]: With dead ends: 67 [2022-03-20 13:42:17,978 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 13:42:17,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:42:17,987 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:17,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:42:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 13:42:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 13:42:18,024 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) [2022-03-20 13:42:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-20 13:42:18,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-20 13:42:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:18,029 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-20 13:42:18,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:42:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-20 13:42:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 13:42:18,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:18,032 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:18,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:42:18,033 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-03-20 13:42:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3306662] [2022-03-20 13:42:18,038 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 2 times [2022-03-20 13:42:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:18,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885871795] [2022-03-20 13:42:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:18,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:18,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:18,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127593801] [2022-03-20 13:42:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:18,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:18,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:42:18,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:42:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:18,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 13:42:18,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:42:18,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885871795] [2022-03-20 13:42:18,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:18,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127593801] [2022-03-20 13:42:18,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127593801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:18,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:18,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:42:18,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:18,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3306662] [2022-03-20 13:42:18,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3306662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:18,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:18,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:42:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429773658] [2022-03-20 13:42:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:18,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:42:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:42:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:42:18,366 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) [2022-03-20 13:42:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:18,474 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-20 13:42:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:18,474 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 [2022-03-20 13:42:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:18,477 INFO L225 Difference]: With dead ends: 51 [2022-03-20 13:42:18,477 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 13:42:18,479 INFO L912 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 [2022-03-20 13:42:18,480 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:18,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 162 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:42:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 13:42:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 13:42:18,504 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) [2022-03-20 13:42:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-20 13:42:18,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-03-20 13:42:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:18,507 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-20 13:42:18,507 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) [2022-03-20 13:42:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-20 13:42:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 13:42:18,508 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:18,508 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:18,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:18,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:18,724 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-03-20 13:42:18,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754576188] [2022-03-20 13:42:18,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 2 times [2022-03-20 13:42:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:18,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069700830] [2022-03-20 13:42:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:18,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877881284] [2022-03-20 13:42:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:18,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:18,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:42:18,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:42:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:42:18,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:42:19,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:19,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069700830] [2022-03-20 13:42:19,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:19,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877881284] [2022-03-20 13:42:19,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877881284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:19,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:19,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 13:42:19,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754576188] [2022-03-20 13:42:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754576188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:42:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047885958] [2022-03-20 13:42:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:19,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:42:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:42:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:19,086 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) [2022-03-20 13:42:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:19,249 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-20 13:42:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:42:19,250 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 [2022-03-20 13:42:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:19,252 INFO L225 Difference]: With dead ends: 100 [2022-03-20 13:42:19,252 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 13:42:19,252 INFO L912 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 [2022-03-20 13:42:19,253 INFO L913 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 [2022-03-20 13:42:19,254 INFO L914 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] [2022-03-20 13:42:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 13:42:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-20 13:42:19,275 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) [2022-03-20 13:42:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-20 13:42:19,278 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-20 13:42:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:19,278 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-20 13:42:19,278 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) [2022-03-20 13:42:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-20 13:42:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 13:42:19,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:19,280 INFO L499 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] [2022-03-20 13:42:19,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:19,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 13:42:19,496 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-03-20 13:42:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:19,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487612871] [2022-03-20 13:42:19,497 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 2 times [2022-03-20 13:42:19,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:19,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070617936] [2022-03-20 13:42:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:19,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963948001] [2022-03-20 13:42:19,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:19,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:19,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:19,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:42:19,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 13:42:19,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:42:19,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:42:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070617936] [2022-03-20 13:42:19,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:19,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963948001] [2022-03-20 13:42:19,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963948001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:19,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:19,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-03-20 13:42:19,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:19,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487612871] [2022-03-20 13:42:19,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487612871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:19,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:19,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:42:19,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115742297] [2022-03-20 13:42:19,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:19,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:42:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:42:19,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:42:19,891 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) [2022-03-20 13:42:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:20,081 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2022-03-20 13:42:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:42:20,081 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 [2022-03-20 13:42:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:20,085 INFO L225 Difference]: With dead ends: 115 [2022-03-20 13:42:20,085 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:42:20,085 INFO L912 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 [2022-03-20 13:42:20,087 INFO L913 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 [2022-03-20 13:42:20,088 INFO L914 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] [2022-03-20 13:42:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:42:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-20 13:42:20,120 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) [2022-03-20 13:42:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-20 13:42:20,124 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-20 13:42:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:20,124 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-20 13:42:20,124 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) [2022-03-20 13:42:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-20 13:42:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:42:20,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:20,125 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:20,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:20,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:20,335 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-03-20 13:42:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620465047] [2022-03-20 13:42:20,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 2 times [2022-03-20 13:42:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153539516] [2022-03-20 13:42:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:20,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318742217] [2022-03-20 13:42:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:20,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:42:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:20,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:42:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:42:20,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:20,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153539516] [2022-03-20 13:42:20,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318742217] [2022-03-20 13:42:20,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318742217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:20,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:20,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:42:20,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620465047] [2022-03-20 13:42:20,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620465047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:20,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:20,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:42:20,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533811959] [2022-03-20 13:42:20,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:20,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:42:20,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:42:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:20,516 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) [2022-03-20 13:42:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:20,641 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-20 13:42:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:42:20,641 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 [2022-03-20 13:42:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:20,642 INFO L225 Difference]: With dead ends: 115 [2022-03-20 13:42:20,643 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:42:20,643 INFO L912 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 [2022-03-20 13:42:20,644 INFO L913 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 [2022-03-20 13:42:20,644 INFO L914 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] [2022-03-20 13:42:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:42:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-20 13:42:20,664 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) [2022-03-20 13:42:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-03-20 13:42:20,665 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2022-03-20 13:42:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:20,665 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-03-20 13:42:20,665 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) [2022-03-20 13:42:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-03-20 13:42:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:42:20,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:20,666 INFO L499 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] [2022-03-20 13:42:20,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:20,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:20,887 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-03-20 13:42:20,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:20,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580070838] [2022-03-20 13:42:20,889 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 2 times [2022-03-20 13:42:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:20,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947352777] [2022-03-20 13:42:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:20,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498661847] [2022-03-20 13:42:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:20,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:20,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:42:20,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:20,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 13:42:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:42:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:42:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947352777] [2022-03-20 13:42:21,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:21,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498661847] [2022-03-20 13:42:21,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498661847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:21,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:21,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 13:42:21,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:21,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580070838] [2022-03-20 13:42:21,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580070838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:21,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:21,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:42:21,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141597313] [2022-03-20 13:42:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:21,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:42:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:42:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:42:21,381 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) [2022-03-20 13:42:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:21,565 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-03-20 13:42:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:42:21,565 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 [2022-03-20 13:42:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:21,568 INFO L225 Difference]: With dead ends: 121 [2022-03-20 13:42:21,568 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 13:42:21,568 INFO L912 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 [2022-03-20 13:42:21,569 INFO L913 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 [2022-03-20 13:42:21,571 INFO L914 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] [2022-03-20 13:42:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 13:42:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-20 13:42:21,606 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) [2022-03-20 13:42:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2022-03-20 13:42:21,609 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2022-03-20 13:42:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:21,609 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2022-03-20 13:42:21,609 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) [2022-03-20 13:42:21,610 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2022-03-20 13:42:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:42:21,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:21,614 INFO L499 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] [2022-03-20 13:42:21,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:21,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:21,823 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 3 times [2022-03-20 13:42:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:21,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159670135] [2022-03-20 13:42:21,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 4 times [2022-03-20 13:42:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:21,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611164414] [2022-03-20 13:42:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:21,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904228363] [2022-03-20 13:42:21,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:21,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:21,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:21,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:42:21,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 13:42:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:42:21,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611164414] [2022-03-20 13:42:21,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904228363] [2022-03-20 13:42:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904228363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:21,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:21,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:21,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159670135] [2022-03-20 13:42:21,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159670135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:21,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:21,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:21,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571616723] [2022-03-20 13:42:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:21,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:42:21,941 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) [2022-03-20 13:42:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:22,010 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-03-20 13:42:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:22,011 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 [2022-03-20 13:42:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:22,012 INFO L225 Difference]: With dead ends: 165 [2022-03-20 13:42:22,012 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 13:42:22,013 INFO L912 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 [2022-03-20 13:42:22,013 INFO L913 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 [2022-03-20 13:42:22,014 INFO L914 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] [2022-03-20 13:42:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 13:42:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-03-20 13:42:22,029 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) [2022-03-20 13:42:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-03-20 13:42:22,030 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2022-03-20 13:42:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:22,030 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-03-20 13:42:22,030 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) [2022-03-20 13:42:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-03-20 13:42:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:42:22,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:22,031 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:42:22,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 13:42:22,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:22,255 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-03-20 13:42:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946077644] [2022-03-20 13:42:22,256 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 2 times [2022-03-20 13:42:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018628691] [2022-03-20 13:42:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:22,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:22,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055599903] [2022-03-20 13:42:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:22,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:22,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:22,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:42:22,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:42:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:42:22,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:22,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018628691] [2022-03-20 13:42:22,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055599903] [2022-03-20 13:42:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055599903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:22,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:22,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:22,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946077644] [2022-03-20 13:42:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946077644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:22,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:22,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035957333] [2022-03-20 13:42:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:22,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:42:22,390 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) [2022-03-20 13:42:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:22,452 INFO L93 Difference]: Finished difference Result 151 states and 206 transitions. [2022-03-20 13:42:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:22,452 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 [2022-03-20 13:42:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:22,454 INFO L225 Difference]: With dead ends: 151 [2022-03-20 13:42:22,454 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 13:42:22,454 INFO L912 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 [2022-03-20 13:42:22,454 INFO L913 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 [2022-03-20 13:42:22,455 INFO L914 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] [2022-03-20 13:42:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 13:42:22,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2022-03-20 13:42:22,473 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) [2022-03-20 13:42:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2022-03-20 13:42:22,474 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2022-03-20 13:42:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:22,475 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2022-03-20 13:42:22,475 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) [2022-03-20 13:42:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2022-03-20 13:42:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:42:22,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:22,476 INFO L499 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] [2022-03-20 13:42:22,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:22,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:22,700 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 1 times [2022-03-20 13:42:22,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888828401] [2022-03-20 13:42:22,701 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 2 times [2022-03-20 13:42:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938936257] [2022-03-20 13:42:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:22,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:22,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595231524] [2022-03-20 13:42:22,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:22,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:22,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:22,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:42:22,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:22,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:42:22,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 13:42:22,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:42:22,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:22,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938936257] [2022-03-20 13:42:22,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595231524] [2022-03-20 13:42:22,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595231524] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:22,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:22,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-03-20 13:42:22,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:22,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888828401] [2022-03-20 13:42:22,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888828401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:22,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:22,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961493517] [2022-03-20 13:42:22,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:22,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:22,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:42:22,983 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) [2022-03-20 13:42:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:23,054 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-03-20 13:42:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:23,055 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 [2022-03-20 13:42:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:23,059 INFO L225 Difference]: With dead ends: 173 [2022-03-20 13:42:23,059 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 13:42:23,060 INFO L912 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 [2022-03-20 13:42:23,062 INFO L913 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 [2022-03-20 13:42:23,062 INFO L914 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] [2022-03-20 13:42:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 13:42:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-20 13:42:23,098 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) [2022-03-20 13:42:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-03-20 13:42:23,101 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 41 [2022-03-20 13:42:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:23,101 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-03-20 13:42:23,101 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) [2022-03-20 13:42:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-03-20 13:42:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:42:23,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:23,105 INFO L499 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] [2022-03-20 13:42:23,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:23,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 13:42:23,321 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-03-20 13:42:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094082162] [2022-03-20 13:42:23,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:23,322 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 2 times [2022-03-20 13:42:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:23,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849513410] [2022-03-20 13:42:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:23,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106371091] [2022-03-20 13:42:23,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:23,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:23,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:23,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:42:23,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 13:42:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:42:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 13:42:24,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849513410] [2022-03-20 13:42:24,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:24,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106371091] [2022-03-20 13:42:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106371091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:24,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 13:42:24,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:24,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094082162] [2022-03-20 13:42:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094082162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:24,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:42:24,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108734379] [2022-03-20 13:42:24,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:24,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:42:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:42:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:42:24,690 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) [2022-03-20 13:42:25,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:25,156 INFO L93 Difference]: Finished difference Result 230 states and 330 transitions. [2022-03-20 13:42:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:42:25,157 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 [2022-03-20 13:42:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:25,163 INFO L225 Difference]: With dead ends: 230 [2022-03-20 13:42:25,163 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 13:42:25,163 INFO L912 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 [2022-03-20 13:42:25,164 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:25,165 INFO L914 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] [2022-03-20 13:42:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 13:42:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-20 13:42:25,205 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) [2022-03-20 13:42:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 323 transitions. [2022-03-20 13:42:25,208 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 323 transitions. Word has length 53 [2022-03-20 13:42:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:25,209 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 323 transitions. [2022-03-20 13:42:25,209 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) [2022-03-20 13:42:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 323 transitions. [2022-03-20 13:42:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:42:25,210 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:25,211 INFO L499 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] [2022-03-20 13:42:25,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:25,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 13:42:25,425 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 3 times [2022-03-20 13:42:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:25,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306928486] [2022-03-20 13:42:25,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 4 times [2022-03-20 13:42:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:25,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449613277] [2022-03-20 13:42:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:25,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:25,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512735218] [2022-03-20 13:42:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:25,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:25,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:42:25,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:25,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:25,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:42:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 13:42:25,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 13:42:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449613277] [2022-03-20 13:42:25,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512735218] [2022-03-20 13:42:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512735218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:25,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:25,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 13:42:25,668 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306928486] [2022-03-20 13:42:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306928486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:25,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:25,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:42:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668329621] [2022-03-20 13:42:25,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:25,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:42:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:42:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:42:25,670 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) [2022-03-20 13:42:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:25,995 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2022-03-20 13:42:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:42:25,996 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 [2022-03-20 13:42:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:26,000 INFO L225 Difference]: With dead ends: 335 [2022-03-20 13:42:26,000 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 13:42:26,002 INFO L912 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 [2022-03-20 13:42:26,003 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:26,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 359 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:42:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 13:42:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 243. [2022-03-20 13:42:26,058 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) [2022-03-20 13:42:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 350 transitions. [2022-03-20 13:42:26,060 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 350 transitions. Word has length 58 [2022-03-20 13:42:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:26,060 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 350 transitions. [2022-03-20 13:42:26,060 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) [2022-03-20 13:42:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 350 transitions. [2022-03-20 13:42:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:42:26,061 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:26,061 INFO L499 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] [2022-03-20 13:42:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:26,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 13:42:26,284 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-03-20 13:42:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:26,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409103666] [2022-03-20 13:42:26,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 2 times [2022-03-20 13:42:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:26,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580857740] [2022-03-20 13:42:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:26,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:26,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:26,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692913266] [2022-03-20 13:42:26,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:26,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:26,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:42:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 13:42:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 13:42:26,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 13:42:26,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580857740] [2022-03-20 13:42:26,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692913266] [2022-03-20 13:42:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692913266] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:26,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:26,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 13:42:26,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409103666] [2022-03-20 13:42:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409103666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:26,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763736533] [2022-03-20 13:42:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:26,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:42:26,685 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) [2022-03-20 13:42:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:26,759 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-03-20 13:42:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:42:26,759 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 [2022-03-20 13:42:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:26,761 INFO L225 Difference]: With dead ends: 249 [2022-03-20 13:42:26,761 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 13:42:26,761 INFO L912 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 [2022-03-20 13:42:26,762 INFO L913 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 [2022-03-20 13:42:26,762 INFO L914 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] [2022-03-20 13:42:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 13:42:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-20 13:42:26,804 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) [2022-03-20 13:42:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 353 transitions. [2022-03-20 13:42:26,806 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 353 transitions. Word has length 63 [2022-03-20 13:42:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:26,806 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 353 transitions. [2022-03-20 13:42:26,806 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) [2022-03-20 13:42:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 353 transitions. [2022-03-20 13:42:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 13:42:26,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:26,807 INFO L499 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] [2022-03-20 13:42:26,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:27,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 13:42:27,027 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 1 times [2022-03-20 13:42:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59698040] [2022-03-20 13:42:27,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 2 times [2022-03-20 13:42:27,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:27,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280484860] [2022-03-20 13:42:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:27,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:27,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771836250] [2022-03-20 13:42:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:27,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:27,039 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:27,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:42:27,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:42:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:42:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 13:42:27,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280484860] [2022-03-20 13:42:27,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771836250] [2022-03-20 13:42:27,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771836250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:27,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:27,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 13:42:27,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59698040] [2022-03-20 13:42:27,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59698040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:27,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:27,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:42:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019248385] [2022-03-20 13:42:27,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:27,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:42:27,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:42:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:42:27,371 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) [2022-03-20 13:42:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:27,645 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2022-03-20 13:42:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:42:27,645 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 [2022-03-20 13:42:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:27,647 INFO L225 Difference]: With dead ends: 261 [2022-03-20 13:42:27,647 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 13:42:27,648 INFO L912 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 [2022-03-20 13:42:27,649 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:27,649 INFO L914 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] [2022-03-20 13:42:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 13:42:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-20 13:42:27,697 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) [2022-03-20 13:42:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-03-20 13:42:27,700 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 61 [2022-03-20 13:42:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:27,701 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-03-20 13:42:27,701 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) [2022-03-20 13:42:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-03-20 13:42:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 13:42:27,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:27,702 INFO L499 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] [2022-03-20 13:42:27,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:27,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 13:42:27,926 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:27,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 3 times [2022-03-20 13:42:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:27,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [782583603] [2022-03-20 13:42:27,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 4 times [2022-03-20 13:42:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:27,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831701040] [2022-03-20 13:42:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:27,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:27,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308180968] [2022-03-20 13:42:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:27,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:27,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:27,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:42:27,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:27,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 13:42:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 13:42:28,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:42:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831701040] [2022-03-20 13:42:28,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308180968] [2022-03-20 13:42:28,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308180968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:28,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:28,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:28,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [782583603] [2022-03-20 13:42:28,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [782583603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:28,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:28,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:42:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93367087] [2022-03-20 13:42:28,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:28,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:42:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:42:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:42:28,090 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) [2022-03-20 13:42:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:28,171 INFO L93 Difference]: Finished difference Result 445 states and 620 transitions. [2022-03-20 13:42:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:42:28,172 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 [2022-03-20 13:42:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:28,173 INFO L225 Difference]: With dead ends: 445 [2022-03-20 13:42:28,174 INFO L226 Difference]: Without dead ends: 270 [2022-03-20 13:42:28,175 INFO L912 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 [2022-03-20 13:42:28,175 INFO L913 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 [2022-03-20 13:42:28,175 INFO L914 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] [2022-03-20 13:42:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-20 13:42:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 250. [2022-03-20 13:42:28,245 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) [2022-03-20 13:42:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-03-20 13:42:28,246 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 66 [2022-03-20 13:42:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:28,247 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-03-20 13:42:28,247 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) [2022-03-20 13:42:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-03-20 13:42:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 13:42:28,248 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:28,248 INFO L499 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] [2022-03-20 13:42:28,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:28,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 13:42:28,463 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 5 times [2022-03-20 13:42:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1379195847] [2022-03-20 13:42:28,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 6 times [2022-03-20 13:42:28,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:28,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630830734] [2022-03-20 13:42:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:28,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:28,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:28,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047788133] [2022-03-20 13:42:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:42:28,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:28,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:28,476 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:28,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:42:28,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:42:28,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 13:42:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:29,241 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 13:42:29,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:30,710 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 13:42:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630830734] [2022-03-20 13:42:34,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047788133] [2022-03-20 13:42:34,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047788133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:34,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-20 13:42:34,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1379195847] [2022-03-20 13:42:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1379195847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:34,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:34,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:42:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688312384] [2022-03-20 13:42:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:34,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:42:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:42:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:42:34,397 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) [2022-03-20 13:42:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:35,547 INFO L93 Difference]: Finished difference Result 321 states and 431 transitions. [2022-03-20 13:42:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:42:35,548 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 [2022-03-20 13:42:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:35,550 INFO L225 Difference]: With dead ends: 321 [2022-03-20 13:42:35,550 INFO L226 Difference]: Without dead ends: 319 [2022-03-20 13:42:35,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:42:35,551 INFO L913 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 [2022-03-20 13:42:35,551 INFO L914 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] [2022-03-20 13:42:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-20 13:42:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-03-20 13:42:35,609 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) [2022-03-20 13:42:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2022-03-20 13:42:35,611 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2022-03-20 13:42:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:35,611 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2022-03-20 13:42:35,612 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) [2022-03-20 13:42:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2022-03-20 13:42:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 13:42:35,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:35,613 INFO L499 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] [2022-03-20 13:42:35,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:35,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:35,827 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 1 times [2022-03-20 13:42:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:35,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689972374] [2022-03-20 13:42:35,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 2 times [2022-03-20 13:42:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410013091] [2022-03-20 13:42:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:35,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:35,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577410873] [2022-03-20 13:42:35,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:42:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:35,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:35,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:42:35,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:42:35,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 13:42:35,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 19 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 13:42:36,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:36,954 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:36,957 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:42:50,155 WARN L855 $PredicateComparison]: unable to prove that (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (let ((.cse11 (+ c_main_~d~0 c_main_~k~0))) (let ((.cse5 (+ (* (- 1) c_main_~r~0 c_main_~y~0) c_main_~a~0)) (.cse0 (= c_main_~p~0 0)) (.cse6 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* (+ (* (- 1) (* c_main_~s~0 .cse11)) c_main_~r~0) c_main_~y~0)) (.cse2 (+ (* (- 1) c_main_~q~0 .cse11) c_main_~p~0))) (and (let ((.cse3 (div .cse5 c_main_~p~0))) (let ((.cse4 (+ (* c_main_~q~0 .cse3) .cse6))) (or .cse0 (= (+ c_main_~b~0 .cse1 (* .cse2 .cse3)) .cse4) (not (= (mod .cse5 c_main_~p~0) 0)) (not (= c_main_~b~0 .cse4))))) (or (not (= .cse5 0)) (not .cse0) (let ((.cse7 (= c_main_~q~0 0)) (.cse8 (+ c_main_~b~0 (* (- 1) c_main_~s~0 c_main_~y~0)))) (and (or (not .cse7) (not (= 0 .cse8)) (forall ((main_~x~0 Int)) (= (+ (* c_main_~s~0 c_main_~y~0) (* c_main_~q~0 main_~x~0)) (let ((.cse9 (+ c_main_~d~0 c_main_~k~0))) (+ (* (+ (* (- 1) c_main_~q~0 .cse9) c_main_~p~0) main_~x~0) c_main_~b~0 (* (+ (* (- 1) (* c_main_~s~0 .cse9)) c_main_~r~0) c_main_~y~0)))))) (or .cse7 (not (= (mod .cse8 c_main_~q~0) 0)) (let ((.cse10 (div .cse8 c_main_~q~0))) (= (+ .cse6 (* c_main_~q~0 .cse10)) (+ c_main_~b~0 .cse1 (* .cse2 .cse10))))))))))) (not (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) 0))) is different from true [2022-03-20 13:42:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410013091] [2022-03-20 13:42:50,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577410873] [2022-03-20 13:42:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577410873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:42:50,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:42:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 13:42:50,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689972374] [2022-03-20 13:42:50,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689972374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:50,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:42:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986201034] [2022-03-20 13:42:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:50,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:42:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:42:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2022-03-20 13:42:50,159 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) [2022-03-20 13:42:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:42:50,980 INFO L93 Difference]: Finished difference Result 388 states and 532 transitions. [2022-03-20 13:42:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:42:50,981 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 [2022-03-20 13:42:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:42:50,984 INFO L225 Difference]: With dead ends: 388 [2022-03-20 13:42:50,984 INFO L226 Difference]: Without dead ends: 385 [2022-03-20 13:42:50,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=96, Invalid=507, Unknown=1, NotChecked=46, Total=650 [2022-03-20 13:42:50,985 INFO L913 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:42:50,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 334 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:42:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-20 13:42:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-03-20 13:42:51,046 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) [2022-03-20 13:42:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2022-03-20 13:42:51,048 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 75 [2022-03-20 13:42:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:42:51,048 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2022-03-20 13:42:51,049 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) [2022-03-20 13:42:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2022-03-20 13:42:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 13:42:51,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:42:51,050 INFO L499 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] [2022-03-20 13:42:51,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 13:42:51,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 13:42:51,271 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:42:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:42:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 3 times [2022-03-20 13:42:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552794730] [2022-03-20 13:42:51,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:42:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 4 times [2022-03-20 13:42:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:42:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083830673] [2022-03-20 13:42:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:42:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:42:51,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:42:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186742909] [2022-03-20 13:42:51,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:42:51,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:42:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:42:51,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:42:51,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:42:51,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:42:51,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:42:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 13:42:51,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 13:42:52,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:54,582 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 [2022-03-20 13:42:56,667 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_main_~d~0))) (or (not (= (* c_main_~b~0 .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)) (= (let ((.cse1 (+ .cse0 c_main_~k~0))) (+ (* (+ (* (- 1) c_main_~q~0 .cse1) c_main_~p~0) c_main_~x~0) c_main_~b~0 (* (+ (* (* c_main_~s~0 .cse1) (- 1)) c_main_~r~0) c_main_~y~0))) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0))) (not (= (+ (* (- 2) c_main_~v~0) c_main_~c~0) 0)))) is different from true [2022-03-20 13:42:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 73 trivial. 3 not checked. [2022-03-20 13:42:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083830673] [2022-03-20 13:42:59,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186742909] [2022-03-20 13:42:59,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186742909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:59,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:59,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-20 13:42:59,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:42:59,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552794730] [2022-03-20 13:42:59,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552794730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:42:59,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:42:59,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:42:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515180082] [2022-03-20 13:42:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:42:59,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:42:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:42:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:42:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=550, Unknown=3, NotChecked=98, Total=756 [2022-03-20 13:42:59,504 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) [2022-03-20 13:43:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:02,725 INFO L93 Difference]: Finished difference Result 406 states and 555 transitions. [2022-03-20 13:43:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:43:02,726 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 [2022-03-20 13:43:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:02,729 INFO L225 Difference]: With dead ends: 406 [2022-03-20 13:43:02,729 INFO L226 Difference]: Without dead ends: 403 [2022-03-20 13:43:02,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=142, Invalid=793, Unknown=3, NotChecked=118, Total=1056 [2022-03-20 13:43:02,730 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:02,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 549 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:43:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-20 13:43:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-03-20 13:43:02,808 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) [2022-03-20 13:43:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 535 transitions. [2022-03-20 13:43:02,811 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 535 transitions. Word has length 80 [2022-03-20 13:43:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:02,811 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 535 transitions. [2022-03-20 13:43:02,811 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) [2022-03-20 13:43:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 535 transitions. [2022-03-20 13:43:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 13:43:02,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:02,812 INFO L499 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] [2022-03-20 13:43:02,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 13:43:03,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 13:43:03,032 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 1 times [2022-03-20 13:43:03,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:03,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057270901] [2022-03-20 13:43:03,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 2 times [2022-03-20 13:43:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497195919] [2022-03-20 13:43:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:03,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320860432] [2022-03-20 13:43:03,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:03,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:03,052 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:03,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:43:03,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:03,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 13:43:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:43:03,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 13:43:04,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497195919] [2022-03-20 13:43:04,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320860432] [2022-03-20 13:43:04,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320860432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:04,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:04,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 13:43:04,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057270901] [2022-03-20 13:43:04,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057270901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:04,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:04,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:43:04,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426700291] [2022-03-20 13:43:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:04,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:43:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:43:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:43:04,005 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) [2022-03-20 13:43:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:04,303 INFO L93 Difference]: Finished difference Result 540 states and 774 transitions. [2022-03-20 13:43:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:43:04,304 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 [2022-03-20 13:43:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:04,307 INFO L225 Difference]: With dead ends: 540 [2022-03-20 13:43:04,307 INFO L226 Difference]: Without dead ends: 538 [2022-03-20 13:43:04,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:43:04,308 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 21 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:04,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 270 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:43:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-20 13:43:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 520. [2022-03-20 13:43:04,423 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) [2022-03-20 13:43:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 754 transitions. [2022-03-20 13:43:04,427 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 754 transitions. Word has length 83 [2022-03-20 13:43:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:04,427 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 754 transitions. [2022-03-20 13:43:04,428 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) [2022-03-20 13:43:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 754 transitions. [2022-03-20 13:43:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 13:43:04,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:04,429 INFO L499 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] [2022-03-20 13:43:04,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:04,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 13:43:04,653 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 7 times [2022-03-20 13:43:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:04,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2004194823] [2022-03-20 13:43:04,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 8 times [2022-03-20 13:43:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539604922] [2022-03-20 13:43:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:04,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:04,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481055003] [2022-03-20 13:43:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:04,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:04,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:04,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:43:04,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:04,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 13:43:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:05,194 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:06,606 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:06,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:07,170 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 13:43:07,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 13:43:09,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539604922] [2022-03-20 13:43:09,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481055003] [2022-03-20 13:43:09,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481055003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:09,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:09,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-03-20 13:43:09,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2004194823] [2022-03-20 13:43:09,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2004194823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:09,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:09,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:43:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371523148] [2022-03-20 13:43:09,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:09,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:43:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:43:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:43:09,459 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) [2022-03-20 13:43:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:11,805 INFO L93 Difference]: Finished difference Result 606 states and 880 transitions. [2022-03-20 13:43:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:43:11,806 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 [2022-03-20 13:43:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:11,810 INFO L225 Difference]: With dead ends: 606 [2022-03-20 13:43:11,810 INFO L226 Difference]: Without dead ends: 604 [2022-03-20 13:43:11,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:43:11,811 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:11,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 418 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 503 Invalid, 0 Unknown, 229 Unchecked, 1.0s Time] [2022-03-20 13:43:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-20 13:43:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2022-03-20 13:43:11,974 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) [2022-03-20 13:43:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 869 transitions. [2022-03-20 13:43:11,977 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 869 transitions. Word has length 91 [2022-03-20 13:43:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:11,978 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 869 transitions. [2022-03-20 13:43:11,978 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) [2022-03-20 13:43:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 869 transitions. [2022-03-20 13:43:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 13:43:11,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:11,979 INFO L499 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] [2022-03-20 13:43:12,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:12,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:12,192 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 5 times [2022-03-20 13:43:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204524346] [2022-03-20 13:43:12,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 6 times [2022-03-20 13:43:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:12,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310201465] [2022-03-20 13:43:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:12,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:12,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:12,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364524545] [2022-03-20 13:43:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:43:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:12,202 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:12,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:43:12,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:43:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:43:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 13:43:12,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:13,055 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:13,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310201465] [2022-03-20 13:43:13,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364524545] [2022-03-20 13:43:13,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364524545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:43:13,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:43:13,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 13:43:13,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:13,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204524346] [2022-03-20 13:43:13,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204524346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:13,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:13,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:43:13,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463974988] [2022-03-20 13:43:13,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:13,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:43:13,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:43:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 13:43:13,244 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) [2022-03-20 13:43:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:13,793 INFO L93 Difference]: Finished difference Result 686 states and 997 transitions. [2022-03-20 13:43:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:43:13,794 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 [2022-03-20 13:43:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:13,799 INFO L225 Difference]: With dead ends: 686 [2022-03-20 13:43:13,799 INFO L226 Difference]: Without dead ends: 683 [2022-03-20 13:43:13,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:43:13,801 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:13,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 274 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:43:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-20 13:43:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 675. [2022-03-20 13:43:13,986 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) [2022-03-20 13:43:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 985 transitions. [2022-03-20 13:43:13,991 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 985 transitions. Word has length 97 [2022-03-20 13:43:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:13,991 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 985 transitions. [2022-03-20 13:43:13,991 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) [2022-03-20 13:43:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 985 transitions. [2022-03-20 13:43:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 13:43:13,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:13,993 INFO L499 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] [2022-03-20 13:43:14,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:14,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:14,207 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 9 times [2022-03-20 13:43:14,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836758135] [2022-03-20 13:43:14,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 10 times [2022-03-20 13:43:14,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:14,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234656119] [2022-03-20 13:43:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:14,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867462100] [2022-03-20 13:43:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:43:14,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:14,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:14,216 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:14,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:43:14,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:43:14,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 13:43:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 13:43:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 13:43:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234656119] [2022-03-20 13:43:17,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:17,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867462100] [2022-03-20 13:43:17,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867462100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:17,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:17,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 33 [2022-03-20 13:43:17,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836758135] [2022-03-20 13:43:17,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836758135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:17,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:17,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:43:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268819410] [2022-03-20 13:43:17,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:17,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:43:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:43:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:43:17,538 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) [2022-03-20 13:43:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:19,338 INFO L93 Difference]: Finished difference Result 767 states and 1110 transitions. [2022-03-20 13:43:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:43:19,339 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 [2022-03-20 13:43:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:19,343 INFO L225 Difference]: With dead ends: 767 [2022-03-20 13:43:19,343 INFO L226 Difference]: Without dead ends: 765 [2022-03-20 13:43:19,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:43:19,344 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 97 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:19,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 694 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:43:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-20 13:43:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2022-03-20 13:43:19,578 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) [2022-03-20 13:43:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1090 transitions. [2022-03-20 13:43:19,584 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1090 transitions. Word has length 96 [2022-03-20 13:43:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:19,585 INFO L478 AbstractCegarLoop]: Abstraction has 747 states and 1090 transitions. [2022-03-20 13:43:19,585 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) [2022-03-20 13:43:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1090 transitions. [2022-03-20 13:43:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 13:43:19,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:19,587 INFO L499 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] [2022-03-20 13:43:19,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:19,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 13:43:19,803 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 7 times [2022-03-20 13:43:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:19,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866770139] [2022-03-20 13:43:19,804 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 8 times [2022-03-20 13:43:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:19,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844292680] [2022-03-20 13:43:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:19,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932841515] [2022-03-20 13:43:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:19,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:19,812 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:19,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:43:19,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 13:43:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:20,759 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 13:43:21,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:22,614 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:43:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844292680] [2022-03-20 13:43:23,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932841515] [2022-03-20 13:43:23,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932841515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:43:23,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:43:23,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 13:43:23,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866770139] [2022-03-20 13:43:23,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866770139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:23,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:23,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:43:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247379495] [2022-03-20 13:43:23,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:23,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:43:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:43:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:43:23,939 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) [2022-03-20 13:43:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:26,340 INFO L93 Difference]: Finished difference Result 831 states and 1208 transitions. [2022-03-20 13:43:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:43:26,341 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 [2022-03-20 13:43:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:26,346 INFO L225 Difference]: With dead ends: 831 [2022-03-20 13:43:26,346 INFO L226 Difference]: Without dead ends: 828 [2022-03-20 13:43:26,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:43:26,349 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:26,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 575 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 13:43:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-20 13:43:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 819. [2022-03-20 13:43:26,589 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) [2022-03-20 13:43:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1195 transitions. [2022-03-20 13:43:26,595 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1195 transitions. Word has length 100 [2022-03-20 13:43:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:26,595 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1195 transitions. [2022-03-20 13:43:26,596 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) [2022-03-20 13:43:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1195 transitions. [2022-03-20 13:43:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 13:43:26,602 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:26,602 INFO L499 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] [2022-03-20 13:43:26,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:26,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 13:43:26,815 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 9 times [2022-03-20 13:43:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2782006] [2022-03-20 13:43:26,816 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 10 times [2022-03-20 13:43:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328521560] [2022-03-20 13:43:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:26,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:26,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348657987] [2022-03-20 13:43:26,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:43:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:26,824 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:43:26,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:43:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 13:43:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 13:43:28,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-20 13:43:36,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328521560] [2022-03-20 13:43:36,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348657987] [2022-03-20 13:43:36,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348657987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:36,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:36,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-20 13:43:36,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2782006] [2022-03-20 13:43:36,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2782006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:36,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:36,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:43:36,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465160326] [2022-03-20 13:43:36,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:36,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:43:36,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:36,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:43:36,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:43:36,208 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) [2022-03-20 13:43:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:39,862 INFO L93 Difference]: Finished difference Result 923 states and 1350 transitions. [2022-03-20 13:43:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:43:39,862 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 [2022-03-20 13:43:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:39,867 INFO L225 Difference]: With dead ends: 923 [2022-03-20 13:43:39,867 INFO L226 Difference]: Without dead ends: 920 [2022-03-20 13:43:39,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:43:39,868 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:39,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 625 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 13:43:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-20 13:43:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-03-20 13:43:40,113 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) [2022-03-20 13:43:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1331 transitions. [2022-03-20 13:43:40,118 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1331 transitions. Word has length 102 [2022-03-20 13:43:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:40,118 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1331 transitions. [2022-03-20 13:43:40,119 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) [2022-03-20 13:43:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1331 transitions. [2022-03-20 13:43:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:43:40,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:40,120 INFO L499 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] [2022-03-20 13:43:40,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:40,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:40,335 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 11 times [2022-03-20 13:43:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:40,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197098637] [2022-03-20 13:43:40,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 12 times [2022-03-20 13:43:40,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:40,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156256084] [2022-03-20 13:43:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:40,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574745393] [2022-03-20 13:43:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:43:40,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:40,348 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:40,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:43:40,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 13:43:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 13:43:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 13:43:41,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 13:43:43,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156256084] [2022-03-20 13:43:43,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574745393] [2022-03-20 13:43:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574745393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:43,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:43,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 13:43:43,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197098637] [2022-03-20 13:43:43,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197098637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:43,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:43,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:43:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587725977] [2022-03-20 13:43:43,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:43,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:43:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:43:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:43:43,083 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) [2022-03-20 13:43:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:44,334 INFO L93 Difference]: Finished difference Result 990 states and 1451 transitions. [2022-03-20 13:43:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:43:44,335 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 [2022-03-20 13:43:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:44,339 INFO L225 Difference]: With dead ends: 990 [2022-03-20 13:43:44,339 INFO L226 Difference]: Without dead ends: 987 [2022-03-20 13:43:44,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:43:44,341 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 76 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:44,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 689 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:43:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-20 13:43:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 912. [2022-03-20 13:43:44,621 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) [2022-03-20 13:43:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1337 transitions. [2022-03-20 13:43:44,625 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1337 transitions. Word has length 105 [2022-03-20 13:43:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:44,626 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1337 transitions. [2022-03-20 13:43:44,626 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) [2022-03-20 13:43:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1337 transitions. [2022-03-20 13:43:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:43:44,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:44,628 INFO L499 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] [2022-03-20 13:43:44,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:44,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:44,846 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 13 times [2022-03-20 13:43:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266130746] [2022-03-20 13:43:44,847 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 14 times [2022-03-20 13:43:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250685350] [2022-03-20 13:43:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:44,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:44,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839984353] [2022-03-20 13:43:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:44,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:44,856 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:44,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 13:43:44,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:44,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 13:43:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 76 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 13:43:45,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-20 13:43:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:48,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250685350] [2022-03-20 13:43:48,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839984353] [2022-03-20 13:43:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839984353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:48,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-03-20 13:43:48,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266130746] [2022-03-20 13:43:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266130746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:48,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:43:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61134561] [2022-03-20 13:43:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:48,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:43:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:43:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:43:48,362 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) [2022-03-20 13:43:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:50,836 INFO L93 Difference]: Finished difference Result 1057 states and 1544 transitions. [2022-03-20 13:43:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:43:50,837 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 [2022-03-20 13:43:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:50,841 INFO L225 Difference]: With dead ends: 1057 [2022-03-20 13:43:50,842 INFO L226 Difference]: Without dead ends: 1054 [2022-03-20 13:43:50,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:43:50,843 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 75 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:50,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 657 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:43:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-20 13:43:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 978. [2022-03-20 13:43:51,149 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) [2022-03-20 13:43:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1429 transitions. [2022-03-20 13:43:51,153 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1429 transitions. Word has length 105 [2022-03-20 13:43:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:51,154 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1429 transitions. [2022-03-20 13:43:51,154 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) [2022-03-20 13:43:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1429 transitions. [2022-03-20 13:43:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 13:43:51,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:51,156 INFO L499 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] [2022-03-20 13:43:51,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 13:43:51,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 13:43:51,371 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 15 times [2022-03-20 13:43:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099206138] [2022-03-20 13:43:51,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 16 times [2022-03-20 13:43:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539878652] [2022-03-20 13:43:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:51,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:51,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709516506] [2022-03-20 13:43:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:43:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:51,384 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:51,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 13:43:51,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:43:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:51,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 13:43:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 94 proven. 89 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 13:43:53,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-20 13:43:55,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539878652] [2022-03-20 13:43:55,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:55,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709516506] [2022-03-20 13:43:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709516506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:55,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:55,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-03-20 13:43:55,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:55,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099206138] [2022-03-20 13:43:55,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099206138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:55,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:55,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:43:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923150321] [2022-03-20 13:43:55,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:55,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:43:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:43:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:43:55,291 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) [2022-03-20 13:43:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:43:57,873 INFO L93 Difference]: Finished difference Result 1079 states and 1562 transitions. [2022-03-20 13:43:57,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:43:57,874 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 [2022-03-20 13:43:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:43:57,879 INFO L225 Difference]: With dead ends: 1079 [2022-03-20 13:43:57,879 INFO L226 Difference]: Without dead ends: 1076 [2022-03-20 13:43:57,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:43:57,880 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:43:57,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 905 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 13:43:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-20 13:43:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 930. [2022-03-20 13:43:58,173 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) [2022-03-20 13:43:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1342 transitions. [2022-03-20 13:43:58,177 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1342 transitions. Word has length 110 [2022-03-20 13:43:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:43:58,177 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1342 transitions. [2022-03-20 13:43:58,177 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) [2022-03-20 13:43:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1342 transitions. [2022-03-20 13:43:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 13:43:58,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:43:58,179 INFO L499 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] [2022-03-20 13:43:58,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 13:43:58,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 13:43:58,395 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:43:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:43:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 1 times [2022-03-20 13:43:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382480749] [2022-03-20 13:43:58,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:43:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 2 times [2022-03-20 13:43:58,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:43:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992285698] [2022-03-20 13:43:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:43:58,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:43:58,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:43:58,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46482860] [2022-03-20 13:43:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:43:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:43:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:43:58,406 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:43:58,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 13:43:58,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:43:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:43:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 13:43:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:43:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 71 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 13:43:59,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:43:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-20 13:43:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:43:59,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992285698] [2022-03-20 13:43:59,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:43:59,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46482860] [2022-03-20 13:43:59,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46482860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:43:59,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:43:59,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 13:43:59,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:59,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382480749] [2022-03-20 13:43:59,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382480749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:59,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:59,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:43:59,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332401446] [2022-03-20 13:43:59,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:59,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:43:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:43:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:43:59,882 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) [2022-03-20 13:44:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:00,661 INFO L93 Difference]: Finished difference Result 1026 states and 1469 transitions. [2022-03-20 13:44:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:44:00,662 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 [2022-03-20 13:44:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:00,667 INFO L225 Difference]: With dead ends: 1026 [2022-03-20 13:44:00,667 INFO L226 Difference]: Without dead ends: 1024 [2022-03-20 13:44:00,667 INFO L912 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 [2022-03-20 13:44:00,668 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 77 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:00,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 556 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:44:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-20 13:44:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1010. [2022-03-20 13:44:00,961 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) [2022-03-20 13:44:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1453 transitions. [2022-03-20 13:44:00,969 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1453 transitions. Word has length 113 [2022-03-20 13:44:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:00,969 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1453 transitions. [2022-03-20 13:44:00,970 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) [2022-03-20 13:44:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1453 transitions. [2022-03-20 13:44:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 13:44:00,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:00,972 INFO L499 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] [2022-03-20 13:44:00,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 13:44:01,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 13:44:01,196 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 3 times [2022-03-20 13:44:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761539762] [2022-03-20 13:44:01,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:44:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 4 times [2022-03-20 13:44:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:44:01,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83729093] [2022-03-20 13:44:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:44:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:44:01,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:44:01,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103274041] [2022-03-20 13:44:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:44:01,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:01,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:44:01,204 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:44:01,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 13:44:01,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:44:01,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:44:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 13:44:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:44:02,277 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:02,311 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:02,627 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:03,553 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:04,538 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:07,357 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:08,114 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:09,174 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:10,207 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:12,952 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:20,637 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:21,979 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:25,263 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:34,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:34,849 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:44:39,212 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 [2022-03-20 13:44:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 90 proven. 126 refuted. 0 times theorem prover too weak. 196 trivial. 3 not checked. [2022-03-20 13:44:47,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:45:26,564 WARN L232 SmtUtils]: Spent 8.75s 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) [2022-03-20 13:45:49,278 WARN L232 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:46:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 116 proven. 86 refuted. 1 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-20 13:46:04,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83729093] [2022-03-20 13:46:04,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103274041] [2022-03-20 13:46:04,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103274041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:04,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:04,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 40 [2022-03-20 13:46:04,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:04,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761539762] [2022-03-20 13:46:04,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761539762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:04,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:04,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:46:04,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505440492] [2022-03-20 13:46:04,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:04,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:46:04,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:46:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1194, Unknown=14, NotChecked=74, Total=1560 [2022-03-20 13:46:04,201 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) [2022-03-20 13:46:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:10,591 INFO L93 Difference]: Finished difference Result 1048 states and 1497 transitions. [2022-03-20 13:46:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:46:10,592 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 [2022-03-20 13:46:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:10,596 INFO L225 Difference]: With dead ends: 1048 [2022-03-20 13:46:10,597 INFO L226 Difference]: Without dead ends: 1046 [2022-03-20 13:46:10,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 72.5s TimeCoverageRelationStatistics Valid=356, Invalid=1614, Unknown=14, NotChecked=86, Total=2070 [2022-03-20 13:46:10,598 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 64 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:10,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 938 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 647 Invalid, 0 Unknown, 669 Unchecked, 2.7s Time] [2022-03-20 13:46:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-20 13:46:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1036. [2022-03-20 13:46:10,876 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) [2022-03-20 13:46:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-03-20 13:46:10,879 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 118 [2022-03-20 13:46:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:10,879 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-03-20 13:46:10,879 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) [2022-03-20 13:46:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-03-20 13:46:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 13:46:10,881 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:10,882 INFO L499 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] [2022-03-20 13:46:10,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 13:46:11,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 13:46:11,087 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 17 times [2022-03-20 13:46:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358897208] [2022-03-20 13:46:11,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:46:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 18 times [2022-03-20 13:46:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777349471] [2022-03-20 13:46:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:11,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:11,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193257672] [2022-03-20 13:46:11,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:46:11,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:11,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:11,097 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:11,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 13:46:11,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 13:46:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:46:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-20 13:46:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 13:46:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777349471] [2022-03-20 13:46:12,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193257672] [2022-03-20 13:46:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193257672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:12,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:12,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 13:46:12,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358897208] [2022-03-20 13:46:12,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358897208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:12,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:12,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:46:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042199255] [2022-03-20 13:46:12,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:12,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:46:12,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:12,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:46:12,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:46:12,261 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) [2022-03-20 13:46:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:13,366 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-20 13:46:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:46:13,367 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 [2022-03-20 13:46:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:13,372 INFO L225 Difference]: With dead ends: 1668 [2022-03-20 13:46:13,372 INFO L226 Difference]: Without dead ends: 1176 [2022-03-20 13:46:13,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:46:13,374 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:13,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 261 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:46:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-20 13:46:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2022-03-20 13:46:13,681 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) [2022-03-20 13:46:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1542 transitions. [2022-03-20 13:46:13,685 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1542 transitions. Word has length 122 [2022-03-20 13:46:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:13,686 INFO L478 AbstractCegarLoop]: Abstraction has 1079 states and 1542 transitions. [2022-03-20 13:46:13,686 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) [2022-03-20 13:46:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1542 transitions. [2022-03-20 13:46:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 13:46:13,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:13,688 INFO L499 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] [2022-03-20 13:46:13,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 13:46:13,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 13:46:13,903 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 19 times [2022-03-20 13:46:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:13,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208067562] [2022-03-20 13:46:13,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:46:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 20 times [2022-03-20 13:46:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:13,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693390098] [2022-03-20 13:46:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:13,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:13,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:13,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507543101] [2022-03-20 13:46:13,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:46:13,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:13,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:13,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 13:46:13,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:46:13,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:13,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 13:46:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:46:20,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:24,602 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:46:24,603 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:46:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:46:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693390098] [2022-03-20 13:46:30,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507543101] [2022-03-20 13:46:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507543101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:30,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-20 13:46:30,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208067562] [2022-03-20 13:46:30,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208067562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:30,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:46:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216851432] [2022-03-20 13:46:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:30,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:46:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:46:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:46:30,341 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) [2022-03-20 13:46:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:46:35,754 INFO L93 Difference]: Finished difference Result 1207 states and 1726 transitions. [2022-03-20 13:46:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:46:35,755 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 [2022-03-20 13:46:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:46:35,760 INFO L225 Difference]: With dead ends: 1207 [2022-03-20 13:46:35,760 INFO L226 Difference]: Without dead ends: 1204 [2022-03-20 13:46:35,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:46:35,761 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:46:35,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 550 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-20 13:46:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-20 13:46:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1118. [2022-03-20 13:46:36,070 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) [2022-03-20 13:46:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1599 transitions. [2022-03-20 13:46:36,074 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1599 transitions. Word has length 122 [2022-03-20 13:46:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:46:36,075 INFO L478 AbstractCegarLoop]: Abstraction has 1118 states and 1599 transitions. [2022-03-20 13:46:36,075 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) [2022-03-20 13:46:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1599 transitions. [2022-03-20 13:46:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 13:46:36,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:46:36,077 INFO L499 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] [2022-03-20 13:46:36,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 13:46:36,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:36,291 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:46:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:46:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 21 times [2022-03-20 13:46:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255481220] [2022-03-20 13:46:36,293 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:46:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 22 times [2022-03-20 13:46:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:46:36,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812659796] [2022-03-20 13:46:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:46:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:46:36,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:46:36,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429574010] [2022-03-20 13:46:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:46:36,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:46:36,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:46:36,302 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:46:36,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 13:46:36,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:46:36,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:46:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 13:46:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:46:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 139 proven. 89 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 13:46:43,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:46:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 149 proven. 47 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 13:46:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:46:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812659796] [2022-03-20 13:46:56,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:46:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429574010] [2022-03-20 13:46:56,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429574010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:46:56,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:46:56,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-20 13:46:56,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:46:56,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255481220] [2022-03-20 13:46:56,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255481220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:46:56,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:46:56,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:46:56,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035836557] [2022-03-20 13:46:56,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:46:56,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:46:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:46:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:46:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:46:56,315 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) [2022-03-20 13:47:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:04,833 INFO L93 Difference]: Finished difference Result 1243 states and 1785 transitions. [2022-03-20 13:47:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:47:04,833 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 [2022-03-20 13:47:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:04,838 INFO L225 Difference]: With dead ends: 1243 [2022-03-20 13:47:04,838 INFO L226 Difference]: Without dead ends: 1240 [2022-03-20 13:47:04,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:47:04,840 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:04,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 738 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-20 13:47:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-20 13:47:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1128. [2022-03-20 13:47:05,166 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) [2022-03-20 13:47:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1613 transitions. [2022-03-20 13:47:05,170 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1613 transitions. Word has length 124 [2022-03-20 13:47:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:05,170 INFO L478 AbstractCegarLoop]: Abstraction has 1128 states and 1613 transitions. [2022-03-20 13:47:05,171 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) [2022-03-20 13:47:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1613 transitions. [2022-03-20 13:47:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 13:47:05,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:05,173 INFO L499 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] [2022-03-20 13:47:05,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:05,396 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 [2022-03-20 13:47:05,396 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 11 times [2022-03-20 13:47:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573464031] [2022-03-20 13:47:05,397 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 12 times [2022-03-20 13:47:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635643624] [2022-03-20 13:47:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:05,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:05,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:05,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091912928] [2022-03-20 13:47:05,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:47:05,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:05,409 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:47:05,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 13:47:05,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:47:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:47:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-20 13:47:06,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:09,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635643624] [2022-03-20 13:47:09,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091912928] [2022-03-20 13:47:09,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091912928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:47:09,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:47:09,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 13:47:09,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573464031] [2022-03-20 13:47:09,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573464031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:09,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:09,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:47:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285117168] [2022-03-20 13:47:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:09,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:47:09,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:09,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:47:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:47:09,688 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) [2022-03-20 13:47:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:12,230 INFO L93 Difference]: Finished difference Result 1166 states and 1653 transitions. [2022-03-20 13:47:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:47:12,231 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 [2022-03-20 13:47:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:12,236 INFO L225 Difference]: With dead ends: 1166 [2022-03-20 13:47:12,236 INFO L226 Difference]: Without dead ends: 1164 [2022-03-20 13:47:12,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:47:12,238 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:12,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 223 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 13:47:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-03-20 13:47:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1111. [2022-03-20 13:47:12,638 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) [2022-03-20 13:47:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1591 transitions. [2022-03-20 13:47:12,642 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1591 transitions. Word has length 121 [2022-03-20 13:47:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:12,642 INFO L478 AbstractCegarLoop]: Abstraction has 1111 states and 1591 transitions. [2022-03-20 13:47:12,642 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) [2022-03-20 13:47:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1591 transitions. [2022-03-20 13:47:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:47:12,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:12,645 INFO L499 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] [2022-03-20 13:47:12,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:12,859 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 [2022-03-20 13:47:12,859 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 23 times [2022-03-20 13:47:12,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:12,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1363838961] [2022-03-20 13:47:12,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:12,861 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 24 times [2022-03-20 13:47:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:12,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884697608] [2022-03-20 13:47:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:12,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:12,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372326205] [2022-03-20 13:47:12,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:47:12,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:12,868 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) [2022-03-20 13:47:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 13:47:12,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 13:47:12,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 13:47:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:47:19,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:22,944 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:47:26,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:26,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884697608] [2022-03-20 13:47:26,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:26,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372326205] [2022-03-20 13:47:26,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372326205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:47:26,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:47:26,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 13:47:26,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:26,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1363838961] [2022-03-20 13:47:26,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1363838961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:26,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:47:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485772918] [2022-03-20 13:47:26,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:26,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:47:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:47:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=694, Unknown=1, NotChecked=0, Total=812 [2022-03-20 13:47:26,340 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) [2022-03-20 13:47:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:47:35,607 INFO L93 Difference]: Finished difference Result 1237 states and 1772 transitions. [2022-03-20 13:47:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:47:35,608 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 [2022-03-20 13:47:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:47:35,613 INFO L225 Difference]: With dead ends: 1237 [2022-03-20 13:47:35,613 INFO L226 Difference]: Without dead ends: 1234 [2022-03-20 13:47:35,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=238, Invalid=1401, Unknown=1, NotChecked=0, Total=1640 [2022-03-20 13:47:35,614 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:47:35,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 859 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-20 13:47:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-20 13:47:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1140. [2022-03-20 13:47:35,963 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) [2022-03-20 13:47:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1634 transitions. [2022-03-20 13:47:35,967 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1634 transitions. Word has length 127 [2022-03-20 13:47:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:47:35,967 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1634 transitions. [2022-03-20 13:47:35,967 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) [2022-03-20 13:47:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1634 transitions. [2022-03-20 13:47:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:47:35,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:47:35,970 INFO L499 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] [2022-03-20 13:47:35,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 13:47:36,183 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 [2022-03-20 13:47:36,183 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:47:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:47:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 25 times [2022-03-20 13:47:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354511603] [2022-03-20 13:47:36,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:47:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 26 times [2022-03-20 13:47:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234384194] [2022-03-20 13:47:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:36,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:36,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695181786] [2022-03-20 13:47:36,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:47:36,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:36,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:36,191 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) [2022-03-20 13:47:36,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 13:47:36,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:47:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:47:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 13:47:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:37,654 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:47:37,656 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:47:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 13:47:44,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-03-20 13:47:53,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234384194] [2022-03-20 13:47:53,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695181786] [2022-03-20 13:47:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695181786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:53,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-20 13:47:53,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:47:53,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354511603] [2022-03-20 13:47:53,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354511603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:47:53,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:47:53,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:47:53,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922835395] [2022-03-20 13:47:53,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:47:53,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:47:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:47:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:47:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:47:53,170 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) [2022-03-20 13:47:58,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:47:59,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:48:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:06,585 INFO L93 Difference]: Finished difference Result 1268 states and 1824 transitions. [2022-03-20 13:48:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:48:06,586 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 [2022-03-20 13:48:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:06,590 INFO L225 Difference]: With dead ends: 1268 [2022-03-20 13:48:06,590 INFO L226 Difference]: Without dead ends: 1265 [2022-03-20 13:48:06,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:48:06,591 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:06,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 846 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-03-20 13:48:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-03-20 13:48:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-03-20 13:48:06,964 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) [2022-03-20 13:48:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1787 transitions. [2022-03-20 13:48:06,969 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1787 transitions. Word has length 127 [2022-03-20 13:48:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:06,970 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1787 transitions. [2022-03-20 13:48:06,970 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) [2022-03-20 13:48:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1787 transitions. [2022-03-20 13:48:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:48:06,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:06,972 INFO L499 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] [2022-03-20 13:48:06,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 13:48:07,194 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 [2022-03-20 13:48:07,195 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 27 times [2022-03-20 13:48:07,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052356599] [2022-03-20 13:48:07,195 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 28 times [2022-03-20 13:48:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116209713] [2022-03-20 13:48:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:07,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:07,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454371379] [2022-03-20 13:48:07,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:48:07,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:07,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:07,204 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) [2022-03-20 13:48:07,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 13:48:07,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:48:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 13:48:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:10,599 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:48:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 137 proven. 134 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 13:48:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:48:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 178 proven. 17 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-03-20 13:48:25,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116209713] [2022-03-20 13:48:25,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454371379] [2022-03-20 13:48:25,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454371379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:48:25,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:48:25,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2022-03-20 13:48:25,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052356599] [2022-03-20 13:48:25,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052356599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:25,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:25,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:48:25,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756849182] [2022-03-20 13:48:25,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:25,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:48:25,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:48:25,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:48:25,936 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) [2022-03-20 13:48:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:37,469 INFO L93 Difference]: Finished difference Result 1339 states and 1928 transitions. [2022-03-20 13:48:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:48:37,470 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 [2022-03-20 13:48:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:37,474 INFO L225 Difference]: With dead ends: 1339 [2022-03-20 13:48:37,474 INFO L226 Difference]: Without dead ends: 1336 [2022-03-20 13:48:37,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:48:37,475 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 103 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:37,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 635 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-03-20 13:48:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-20 13:48:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1243. [2022-03-20 13:48:37,857 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) [2022-03-20 13:48:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1790 transitions. [2022-03-20 13:48:37,862 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1790 transitions. Word has length 127 [2022-03-20 13:48:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:37,862 INFO L478 AbstractCegarLoop]: Abstraction has 1243 states and 1790 transitions. [2022-03-20 13:48:37,862 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) [2022-03-20 13:48:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1790 transitions. [2022-03-20 13:48:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 13:48:37,865 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:37,865 INFO L499 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] [2022-03-20 13:48:37,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 13:48:38,091 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 [2022-03-20 13:48:38,091 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 29 times [2022-03-20 13:48:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639399905] [2022-03-20 13:48:38,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:38,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 30 times [2022-03-20 13:48:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:38,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695124135] [2022-03-20 13:48:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:38,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:38,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544400567] [2022-03-20 13:48:38,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:48:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:38,101 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) [2022-03-20 13:48:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 13:48:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 13:48:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 13:48:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 13:48:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:48:55,540 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:49:26,389 WARN L232 SmtUtils]: Spent 6.22s 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) [2022-03-20 13:49:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 156 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 13:49:40,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:49:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695124135] [2022-03-20 13:49:40,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:49:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544400567] [2022-03-20 13:49:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544400567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:49:40,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:49:40,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2022-03-20 13:49:40,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:49:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639399905] [2022-03-20 13:49:40,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639399905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:49:40,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:49:40,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:49:40,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540681067] [2022-03-20 13:49:40,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:49:40,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:49:40,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:49:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1247, Unknown=3, NotChecked=0, Total=1560 [2022-03-20 13:49:40,357 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) [2022-03-20 13:49:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:49:48,233 INFO L93 Difference]: Finished difference Result 1350 states and 1938 transitions. [2022-03-20 13:49:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:49:48,234 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 [2022-03-20 13:49:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:49:48,247 INFO L225 Difference]: With dead ends: 1350 [2022-03-20 13:49:48,247 INFO L226 Difference]: Without dead ends: 1347 [2022-03-20 13:49:48,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=457, Invalid=1892, Unknown=3, NotChecked=0, Total=2352 [2022-03-20 13:49:48,249 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:49:48,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 871 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-20 13:49:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-03-20 13:49:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1248. [2022-03-20 13:49:48,781 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) [2022-03-20 13:49:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1795 transitions. [2022-03-20 13:49:48,786 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1795 transitions. Word has length 130 [2022-03-20 13:49:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:49:48,786 INFO L478 AbstractCegarLoop]: Abstraction has 1248 states and 1795 transitions. [2022-03-20 13:49:48,786 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) [2022-03-20 13:49:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1795 transitions. [2022-03-20 13:49:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 13:49:48,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:49:48,789 INFO L499 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] [2022-03-20 13:49:48,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 13:49:49,012 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 [2022-03-20 13:49:49,012 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:49:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:49:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 31 times [2022-03-20 13:49:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138966450] [2022-03-20 13:49:49,013 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:49:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 32 times [2022-03-20 13:49:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:49:49,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293795171] [2022-03-20 13:49:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:49:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:49:49,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:49:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397899629] [2022-03-20 13:49:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:49:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:49:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:49:49,022 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) [2022-03-20 13:49:49,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 13:49:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:49:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:49:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 13:49:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:49:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 107 proven. 114 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 13:49:56,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:49:59,656 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:50:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:50:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293795171] [2022-03-20 13:50:02,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:50:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397899629] [2022-03-20 13:50:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397899629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:50:02,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:50:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 13:50:02,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:50:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138966450] [2022-03-20 13:50:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138966450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:50:02,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:50:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:50:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397619278] [2022-03-20 13:50:02,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:50:02,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:50:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:50:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:50:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:50:02,338 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) [2022-03-20 13:50:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:50:16,292 INFO L93 Difference]: Finished difference Result 1389 states and 2002 transitions. [2022-03-20 13:50:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:50:16,293 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 [2022-03-20 13:50:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:50:16,298 INFO L225 Difference]: With dead ends: 1389 [2022-03-20 13:50:16,298 INFO L226 Difference]: Without dead ends: 1386 [2022-03-20 13:50:16,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:50:16,299 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 91 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:50:16,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1115 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-03-20 13:50:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-03-20 13:50:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1343. [2022-03-20 13:50:16,729 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) [2022-03-20 13:50:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1945 transitions. [2022-03-20 13:50:16,734 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1945 transitions. Word has length 132 [2022-03-20 13:50:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:50:16,734 INFO L478 AbstractCegarLoop]: Abstraction has 1343 states and 1945 transitions. [2022-03-20 13:50:16,734 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) [2022-03-20 13:50:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1945 transitions. [2022-03-20 13:50:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 13:50:16,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:50:16,736 INFO L499 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] [2022-03-20 13:50:16,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 13:50:16,959 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 [2022-03-20 13:50:16,960 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:50:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:50:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 33 times [2022-03-20 13:50:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:50:16,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526112678] [2022-03-20 13:50:16,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:50:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 34 times [2022-03-20 13:50:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:50:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995884811] [2022-03-20 13:50:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:50:16,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:50:16,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:50:16,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392937982] [2022-03-20 13:50:16,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:50:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:50:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:50:16,967 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) [2022-03-20 13:50:16,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 13:50:17,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:50:17,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:50:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-20 13:50:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:50:20,257 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:50:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 162 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 13:50:49,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:51:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-03-20 13:51:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:51:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995884811] [2022-03-20 13:51:05,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:51:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392937982] [2022-03-20 13:51:05,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392937982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:51:05,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:51:05,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-03-20 13:51:05,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:51:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526112678] [2022-03-20 13:51:05,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526112678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:51:05,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:51:05,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:51:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563144036] [2022-03-20 13:51:05,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:51:05,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:51:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:51:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:51:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:51:05,654 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) [2022-03-20 13:51:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:51:12,217 INFO L93 Difference]: Finished difference Result 1389 states and 2006 transitions. [2022-03-20 13:51:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:51:12,217 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 [2022-03-20 13:51:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:51:12,221 INFO L225 Difference]: With dead ends: 1389 [2022-03-20 13:51:12,221 INFO L226 Difference]: Without dead ends: 1382 [2022-03-20 13:51:12,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:51:12,223 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 65 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:51:12,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 969 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 677 Invalid, 0 Unknown, 370 Unchecked, 2.8s Time] [2022-03-20 13:51:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-20 13:51:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1366. [2022-03-20 13:51:12,692 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) [2022-03-20 13:51:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1979 transitions. [2022-03-20 13:51:12,696 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1979 transitions. Word has length 132 [2022-03-20 13:51:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:51:12,697 INFO L478 AbstractCegarLoop]: Abstraction has 1366 states and 1979 transitions. [2022-03-20 13:51:12,697 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) [2022-03-20 13:51:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1979 transitions. [2022-03-20 13:51:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 13:51:12,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:51:12,700 INFO L499 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] [2022-03-20 13:51:12,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 13:51:12,915 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 [2022-03-20 13:51:12,915 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:51:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:51:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 35 times [2022-03-20 13:51:12,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:51:12,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092812078] [2022-03-20 13:51:12,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:51:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 36 times [2022-03-20 13:51:12,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:51:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360018904] [2022-03-20 13:51:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:51:12,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:51:12,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:51:12,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443019568] [2022-03-20 13:51:12,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:51:12,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:51:12,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:51:12,928 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) [2022-03-20 13:51:12,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 13:51:13,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 13:51:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:51:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 13:51:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:51:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-20 13:51:23,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:51:30,974 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:51:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:51:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360018904] [2022-03-20 13:51:34,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:51:34,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443019568] [2022-03-20 13:51:34,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443019568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:51:34,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:51:34,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 13:51:34,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:51:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092812078] [2022-03-20 13:51:34,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092812078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:51:34,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:51:34,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:51:34,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462462357] [2022-03-20 13:51:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:51:34,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:51:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:51:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:51:34,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:51:34,436 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) [2022-03-20 13:51:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:51:49,295 INFO L93 Difference]: Finished difference Result 1491 states and 2148 transitions. [2022-03-20 13:51:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:51:49,296 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 [2022-03-20 13:51:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:51:49,301 INFO L225 Difference]: With dead ends: 1491 [2022-03-20 13:51:49,301 INFO L226 Difference]: Without dead ends: 1488 [2022-03-20 13:51:49,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 13:51:49,303 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 109 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:51:49,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1091 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-03-20 13:51:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-03-20 13:51:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1448. [2022-03-20 13:51:49,824 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) [2022-03-20 13:51:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2095 transitions. [2022-03-20 13:51:49,829 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2095 transitions. Word has length 135 [2022-03-20 13:51:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:51:49,829 INFO L478 AbstractCegarLoop]: Abstraction has 1448 states and 2095 transitions. [2022-03-20 13:51:49,829 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) [2022-03-20 13:51:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2095 transitions. [2022-03-20 13:51:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 13:51:49,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:51:49,832 INFO L499 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] [2022-03-20 13:51:49,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 13:51:50,047 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 [2022-03-20 13:51:50,047 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:51:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:51:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 37 times [2022-03-20 13:51:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:51:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [972967600] [2022-03-20 13:51:50,048 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:51:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 38 times [2022-03-20 13:51:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:51:50,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665011395] [2022-03-20 13:51:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:51:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:51:50,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:51:50,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553483082] [2022-03-20 13:51:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:51:50,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:51:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:51:50,060 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) [2022-03-20 13:51:50,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 13:51:50,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:51:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:51:50,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-20 13:51:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:51:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 99 proven. 182 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 13:51:56,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:52:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 170 proven. 52 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 13:52:03,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:52:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665011395] [2022-03-20 13:52:03,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:52:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553483082] [2022-03-20 13:52:03,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553483082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:52:03,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:52:03,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 13:52:03,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:52:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [972967600] [2022-03-20 13:52:03,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [972967600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:52:03,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:52:03,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:52:03,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501329924] [2022-03-20 13:52:03,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:52:03,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:52:03,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:52:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:52:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:52:03,979 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) [2022-03-20 13:52:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:52:13,951 INFO L93 Difference]: Finished difference Result 1574 states and 2264 transitions. [2022-03-20 13:52:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:52:13,952 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 [2022-03-20 13:52:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:52:13,957 INFO L225 Difference]: With dead ends: 1574 [2022-03-20 13:52:13,957 INFO L226 Difference]: Without dead ends: 1571 [2022-03-20 13:52:13,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:52:13,958 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:52:13,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 975 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-20 13:52:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-03-20 13:52:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1524. [2022-03-20 13:52:14,509 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) [2022-03-20 13:52:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2203 transitions. [2022-03-20 13:52:14,512 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2203 transitions. Word has length 135 [2022-03-20 13:52:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:52:14,512 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 2203 transitions. [2022-03-20 13:52:14,513 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) [2022-03-20 13:52:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2203 transitions. [2022-03-20 13:52:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 13:52:14,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:52:14,514 INFO L499 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] [2022-03-20 13:52:14,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 13:52:14,719 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 [2022-03-20 13:52:14,719 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:52:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:52:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 5 times [2022-03-20 13:52:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:52:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452507305] [2022-03-20 13:52:14,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:52:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 6 times [2022-03-20 13:52:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:52:14,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091842898] [2022-03-20 13:52:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:52:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:52:14,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:52:14,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635286306] [2022-03-20 13:52:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:52:14,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:52:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:52:14,726 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) [2022-03-20 13:52:14,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 13:52:14,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 13:52:14,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:52:14,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 13:52:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:52:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-20 13:52:17,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:52:19,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:52:19,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091842898] [2022-03-20 13:52:19,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:52:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635286306] [2022-03-20 13:52:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635286306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:52:19,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:52:19,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 13:52:19,998 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:52:19,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452507305] [2022-03-20 13:52:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452507305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:52:19,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:52:19,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:52:19,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744961574] [2022-03-20 13:52:19,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:52:19,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:52:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:52:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:52:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:52:19,999 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) [2022-03-20 13:52:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:52:39,557 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-20 13:52:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:52:39,559 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 [2022-03-20 13:52:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:52:39,563 INFO L225 Difference]: With dead ends: 1668 [2022-03-20 13:52:39,563 INFO L226 Difference]: Without dead ends: 1666 [2022-03-20 13:52:39,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=241, Invalid=1086, Unknown=5, NotChecked=0, Total=1332 [2022-03-20 13:52:39,565 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 75 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:52:39,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 682 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 820 Invalid, 0 Unknown, 64 Unchecked, 3.7s Time] [2022-03-20 13:52:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-03-20 13:52:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1536. [2022-03-20 13:52:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 862 states have (on average 1.216937354988399) internal successors, (1049), 895 states have internal predecessors, (1049), 585 states have call successors, (585), 89 states have call predecessors, (585), 88 states have return successors, (583), 551 states have call predecessors, (583), 583 states have call successors, (583) [2022-03-20 13:52:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2217 transitions. [2022-03-20 13:52:40,247 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2217 transitions. Word has length 140 [2022-03-20 13:52:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:52:40,248 INFO L478 AbstractCegarLoop]: Abstraction has 1536 states and 2217 transitions. [2022-03-20 13:52:40,248 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) [2022-03-20 13:52:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2217 transitions. [2022-03-20 13:52:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 13:52:40,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:52:40,251 INFO L499 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] [2022-03-20 13:52:40,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 13:52:40,463 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 [2022-03-20 13:52:40,463 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:52:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:52:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 39 times [2022-03-20 13:52:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:52:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481334418] [2022-03-20 13:52:40,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:52:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 40 times [2022-03-20 13:52:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:52:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144355963] [2022-03-20 13:52:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:52:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:52:40,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:52:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179738630] [2022-03-20 13:52:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:52:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:52:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:52:40,473 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) [2022-03-20 13:52:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 13:52:40,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:52:40,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:52:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 13:52:40,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:52:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 13:52:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:52:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-20 13:52:53,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:52:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144355963] [2022-03-20 13:52:53,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:52:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179738630] [2022-03-20 13:52:53,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179738630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:52:53,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:52:53,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 34 [2022-03-20 13:52:53,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:52:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481334418] [2022-03-20 13:52:53,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481334418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:52:53,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:52:53,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:52:53,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609169648] [2022-03-20 13:52:53,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:52:53,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:52:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:52:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:52:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:52:53,441 INFO L87 Difference]: Start difference. First operand 1536 states and 2217 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 13:53:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:08,044 INFO L93 Difference]: Finished difference Result 1739 states and 2500 transitions. [2022-03-20 13:53:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:53:08,045 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 [2022-03-20 13:53:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:08,050 INFO L225 Difference]: With dead ends: 1739 [2022-03-20 13:53:08,050 INFO L226 Difference]: Without dead ends: 1732 [2022-03-20 13:53:08,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:53:08,051 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 114 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:08,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1233 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-03-20 13:53:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-03-20 13:53:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1584. [2022-03-20 13:53:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 892 states have (on average 1.2141255605381165) internal successors, (1083), 926 states have internal predecessors, (1083), 599 states have call successors, (599), 93 states have call predecessors, (599), 92 states have return successors, (597), 564 states have call predecessors, (597), 597 states have call successors, (597) [2022-03-20 13:53:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2279 transitions. [2022-03-20 13:53:08,766 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2279 transitions. Word has length 140 [2022-03-20 13:53:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:08,766 INFO L478 AbstractCegarLoop]: Abstraction has 1584 states and 2279 transitions. [2022-03-20 13:53:08,766 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) [2022-03-20 13:53:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2279 transitions. [2022-03-20 13:53:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 13:53:08,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:08,769 INFO L499 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] [2022-03-20 13:53:08,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 13:53:08,975 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 [2022-03-20 13:53:08,975 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 41 times [2022-03-20 13:53:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [913846216] [2022-03-20 13:53:08,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:53:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 42 times [2022-03-20 13:53:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:08,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497556661] [2022-03-20 13:53:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:08,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:08,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204715769] [2022-03-20 13:53:08,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:53:08,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:08,987 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) [2022-03-20 13:53:08,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 13:53:09,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 13:53:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:09,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 13:53:09,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:53:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-20 13:53:15,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:53:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-20 13:53:24,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:53:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497556661] [2022-03-20 13:53:24,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:53:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204715769] [2022-03-20 13:53:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204715769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:53:24,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:53:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-03-20 13:53:24,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:53:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [913846216] [2022-03-20 13:53:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [913846216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:53:24,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:53:24,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:53:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620055142] [2022-03-20 13:53:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:53:24,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:53:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:53:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:53:24,282 INFO L87 Difference]: Start difference. First operand 1584 states and 2279 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-20 13:53:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:53:31,266 INFO L93 Difference]: Finished difference Result 1905 states and 2730 transitions. [2022-03-20 13:53:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:53:31,267 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 [2022-03-20 13:53:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:53:31,272 INFO L225 Difference]: With dead ends: 1905 [2022-03-20 13:53:31,272 INFO L226 Difference]: Without dead ends: 1675 [2022-03-20 13:53:31,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:53:31,274 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 63 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:53:31,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 597 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 13:53:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-03-20 13:53:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1657. [2022-03-20 13:53:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 934 states have (on average 1.2130620985010707) internal successors, (1133), 971 states have internal predecessors, (1133), 626 states have call successors, (626), 97 states have call predecessors, (626), 96 states have return successors, (624), 588 states have call predecessors, (624), 624 states have call successors, (624) [2022-03-20 13:53:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2383 transitions. [2022-03-20 13:53:32,107 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2383 transitions. Word has length 144 [2022-03-20 13:53:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:53:32,108 INFO L478 AbstractCegarLoop]: Abstraction has 1657 states and 2383 transitions. [2022-03-20 13:53:32,108 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) [2022-03-20 13:53:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2383 transitions. [2022-03-20 13:53:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 13:53:32,110 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:53:32,110 INFO L499 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] [2022-03-20 13:53:32,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 13:53:32,319 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 [2022-03-20 13:53:32,319 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:53:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:53:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 43 times [2022-03-20 13:53:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:53:32,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335493556] [2022-03-20 13:53:32,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:53:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 44 times [2022-03-20 13:53:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:53:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563929257] [2022-03-20 13:53:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:53:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:53:32,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:53:32,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883806936] [2022-03-20 13:53:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:53:32,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:53:32,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:53:32,332 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) [2022-03-20 13:53:32,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 13:53:32,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:53:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:53:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 13:53:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates...