/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/cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:33:54,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:33:54,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:33:54,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:33:54,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:33:54,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:33:54,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:33:54,174 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 13:33:54,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:33:54,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:33:54,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:33:54,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:33:54,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:33:54,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:33:54,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:33:54,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:33:54,186 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:33:54,187 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:33:54,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:33:54,187 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:33:54,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:33:54,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:33:54,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:33:54,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:33:54,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:33:54,391 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:33:54,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2022-03-20 13:33:54,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03619718a/905d945bbcb24da9aba0d6628f194c8e/FLAG9222f07f3 [2022-03-20 13:33:54,750 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:33:54,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2022-03-20 13:33:54,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03619718a/905d945bbcb24da9aba0d6628f194c8e/FLAG9222f07f3 [2022-03-20 13:33:55,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03619718a/905d945bbcb24da9aba0d6628f194c8e [2022-03-20 13:33:55,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:33:55,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:33:55,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:33:55,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:33:55,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:33:55,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628f1a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55, skipping insertion in model container [2022-03-20 13:33:55,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:33:55,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:33:55,328 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/cohencu-ll.c[588,601] [2022-03-20 13:33:55,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:33:55,371 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:33:55,384 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/cohencu-ll.c[588,601] [2022-03-20 13:33:55,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:33:55,410 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:33:55,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55 WrapperNode [2022-03-20 13:33:55,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:33:55,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:33:55,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:33:55,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:33:55,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:33:55,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:33:55,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:33:55,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:33:55,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (1/1) ... [2022-03-20 13:33:55,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:33:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:55,487 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 13:33:55,497 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 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:33:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:33:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:33:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:33:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:33:55,564 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:33:55,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:33:55,690 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:33:55,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:33:55,695 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:33:55,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:33:55 BoogieIcfgContainer [2022-03-20 13:33:55,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:33:55,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:33:55,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:33:55,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:33:55,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:33:55" (1/3) ... [2022-03-20 13:33:55,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd8a200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:33:55, skipping insertion in model container [2022-03-20 13:33:55,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:55" (2/3) ... [2022-03-20 13:33:55,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd8a200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:33:55, skipping insertion in model container [2022-03-20 13:33:55,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:33:55" (3/3) ... [2022-03-20 13:33:55,702 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll.c [2022-03-20 13:33:55,705 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:33:55,705 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:33:55,749 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:33:55,764 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 13:33:55,764 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:33:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:33:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:33:55,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:55,783 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:55,783 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1298655804, now seen corresponding path program 1 times [2022-03-20 13:33:55,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520410421] [2022-03-20 13:33:55,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:55,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1298655804, now seen corresponding path program 2 times [2022-03-20 13:33:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:55,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741122819] [2022-03-20 13:33:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:55,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:33:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:55,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:55,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741122819] [2022-03-20 13:33:55,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741122819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:55,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:55,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:33:55,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520410421] [2022-03-20 13:33:55,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520410421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:55,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:55,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:33:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339758560] [2022-03-20 13:33:55,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:55,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:33:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:33:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:33:55,993 INFO L87 Difference]: Start difference. First operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:33:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:56,081 INFO L93 Difference]: Finished difference Result 54 states and 91 transitions. [2022-03-20 13:33:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:33:56,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:33:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:56,089 INFO L225 Difference]: With dead ends: 54 [2022-03-20 13:33:56,089 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 13:33:56,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:33:56,101 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:56,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:33:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 13:33:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 13:33:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:33:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-03-20 13:33:56,127 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2022-03-20 13:33:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:56,128 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-03-20 13:33:56,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:33:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-03-20 13:33:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:33:56,128 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:56,129 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:56,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:33:56,129 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1297106672, now seen corresponding path program 1 times [2022-03-20 13:33:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194114521] [2022-03-20 13:33:56,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1297106672, now seen corresponding path program 2 times [2022-03-20 13:33:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:56,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253931659] [2022-03-20 13:33:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:56,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:33:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:33:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:56,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253931659] [2022-03-20 13:33:56,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253931659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:33:56,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194114521] [2022-03-20 13:33:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194114521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:33:56,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667186342] [2022-03-20 13:33:56,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:56,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:33:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:33:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:33:56,215 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:33:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:56,328 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-20 13:33:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:33:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:33:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:56,329 INFO L225 Difference]: With dead ends: 31 [2022-03-20 13:33:56,329 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 13:33:56,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:33:56,331 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:56,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:33:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 13:33:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 13:33:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:33:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-03-20 13:33:56,338 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2022-03-20 13:33:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:56,339 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-03-20 13:33:56,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:33:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-03-20 13:33:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 13:33:56,339 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:56,339 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:56,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:33:56,339 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2099401665, now seen corresponding path program 1 times [2022-03-20 13:33:56,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44568623] [2022-03-20 13:33:56,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2099401665, now seen corresponding path program 2 times [2022-03-20 13:33:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:56,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105369407] [2022-03-20 13:33:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:56,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:56,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888091578] [2022-03-20 13:33:56,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:56,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:56,350 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 13:33:56,376 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 13:33:56,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:56,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:33:56,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:56,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:33:56,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105369407] [2022-03-20 13:33:56,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888091578] [2022-03-20 13:33:56,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888091578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:56,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:56,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44568623] [2022-03-20 13:33:56,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44568623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170652940] [2022-03-20 13:33:56,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:56,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:33:56,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:33:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:33:56,491 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:56,540 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-03-20 13:33:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:33:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-20 13:33:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:56,543 INFO L225 Difference]: With dead ends: 48 [2022-03-20 13:33:56,544 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:33:56,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 13:33:56,548 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:56,553 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:33:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:33:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2022-03-20 13:33:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:33:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-03-20 13:33:56,563 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2022-03-20 13:33:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:56,564 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-03-20 13:33:56,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-03-20 13:33:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 13:33:56,564 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:56,564 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:56,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 13:33:56,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:56,765 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1061128656, now seen corresponding path program 1 times [2022-03-20 13:33:56,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869368978] [2022-03-20 13:33:56,767 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1061128656, now seen corresponding path program 2 times [2022-03-20 13:33:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:56,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462624815] [2022-03-20 13:33:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:56,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556671439] [2022-03-20 13:33:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:56,797 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 13:33:56,798 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 13:33:56,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:56,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 13:33:56,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:33:56,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:33:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462624815] [2022-03-20 13:33:56,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556671439] [2022-03-20 13:33:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556671439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:56,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869368978] [2022-03-20 13:33:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869368978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:56,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:56,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:56,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957569849] [2022-03-20 13:33:56,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:56,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:33:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:33:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:33:56,918 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:56,975 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2022-03-20 13:33:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:33:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-03-20 13:33:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:56,977 INFO L225 Difference]: With dead ends: 52 [2022-03-20 13:33:56,977 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 13:33:56,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 13:33:56,978 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:56,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:33:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 13:33:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-03-20 13:33:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 13:33:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-03-20 13:33:56,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 21 [2022-03-20 13:33:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:56,987 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-03-20 13:33:56,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:33:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-03-20 13:33:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 13:33:56,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:56,988 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:57,022 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 13:33:57,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 13:33:57,205 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2039501471, now seen corresponding path program 1 times [2022-03-20 13:33:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:57,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358078143] [2022-03-20 13:33:57,206 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:57,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2039501471, now seen corresponding path program 2 times [2022-03-20 13:33:57,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:57,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928310422] [2022-03-20 13:33:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:57,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:57,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:57,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184558096] [2022-03-20 13:33:57,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:57,230 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 13:33:57,302 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 13:33:57,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:57,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:33:57,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:33:57,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:33:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928310422] [2022-03-20 13:33:57,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184558096] [2022-03-20 13:33:57,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184558096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:57,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:57,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:57,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358078143] [2022-03-20 13:33:57,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358078143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:57,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:57,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:33:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718708123] [2022-03-20 13:33:57,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:57,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:33:57,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:57,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:33:57,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:33:57,399 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:33:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:57,459 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-03-20 13:33:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:33:57,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-03-20 13:33:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:57,460 INFO L225 Difference]: With dead ends: 60 [2022-03-20 13:33:57,460 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 13:33:57,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 13:33:57,461 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:57,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:33:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 13:33:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-20 13:33:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:33:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-03-20 13:33:57,469 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 26 [2022-03-20 13:33:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:57,469 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-03-20 13:33:57,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 13:33:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-03-20 13:33:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:33:57,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:57,470 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:57,488 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 13:33:57,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:57,681 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash 542006608, now seen corresponding path program 1 times [2022-03-20 13:33:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:57,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498567373] [2022-03-20 13:35:10,809 WARN L232 SmtUtils]: Spent 1.21m on a formula simplification. DAG size of input: 195 DAG size of output: 193 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 13:35:10,816 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:35:10,818 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:35:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 688371743, now seen corresponding path program 1 times [2022-03-20 13:35:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:35:10,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228812231] [2022-03-20 13:35:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:35:10,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:35:10,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813028304] [2022-03-20 13:35:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:35:10,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:35:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:35:10,848 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 13:35:10,849 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 13:35:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:35:11,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:35:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:35:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:35:13,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:35:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:35:51,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:35:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228812231] [2022-03-20 13:35:51,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:35:51,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813028304] [2022-03-20 13:35:51,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813028304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:35:51,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:35:51,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 13:36:57,563 WARN L232 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 28 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:37:25,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:37:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498567373] [2022-03-20 13:37:25,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498567373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:37:25,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:37:25,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:37:25,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685598683] [2022-03-20 13:37:25,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:37:25,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:37:25,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:37:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:37:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=971, Unknown=30, NotChecked=0, Total=1190 [2022-03-20 13:37:25,291 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:37:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:37:41,730 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-03-20 13:37:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 13:37:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2022-03-20 13:37:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:37:41,732 INFO L225 Difference]: With dead ends: 68 [2022-03-20 13:37:41,732 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 13:37:41,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 109.7s TimeCoverageRelationStatistics Valid=231, Invalid=1219, Unknown=32, NotChecked=0, Total=1482 [2022-03-20 13:37:41,733 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:37:41,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 283 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 134 Unchecked, 0.8s Time] [2022-03-20 13:37:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 13:37:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-03-20 13:37:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 13:37:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-03-20 13:37:41,745 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 43 [2022-03-20 13:37:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:37:41,745 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-03-20 13:37:41,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:37:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-03-20 13:37:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 13:37:41,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:37:41,746 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:37:41,753 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 13:37:41,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:37:41,951 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:37:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:37:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 806930367, now seen corresponding path program 2 times [2022-03-20 13:37:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:37:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613084269] [2022-03-20 13:39:59,283 WARN L232 SmtUtils]: Spent 2.29m on a formula simplification. DAG size of input: 195 DAG size of output: 191 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 13:39:59,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:39:59,287 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:39:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 524117648, now seen corresponding path program 1 times [2022-03-20 13:39:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:39:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066778142] [2022-03-20 13:39:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:39:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:39:59,294 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:39:59,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58702668] [2022-03-20 13:39:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:39:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:39:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:39:59,296 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 13:39:59,296 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 13:39:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 13:39:59,697 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 13:39:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 13:39:59,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 13:39:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 806930367, now seen corresponding path program 3 times [2022-03-20 13:39:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:39:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265014042] [2022-03-20 13:39:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:39:59,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:39:59,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:39:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406555253] [2022-03-20 13:39:59,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 13:39:59,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:39:59,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:39:59,975 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 13:40:00,019 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 13:40:00,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 13:40:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:40:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:40:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:40:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 13:40:00,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:40:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 13:40:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:40:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265014042] [2022-03-20 13:40:01,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:40:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406555253] [2022-03-20 13:40:01,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406555253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:40:01,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:40:01,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 13:40:01,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:40:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613084269] [2022-03-20 13:40:01,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613084269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:40:01,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:40:01,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:40:01,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580693420] [2022-03-20 13:40:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:40:01,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:40:01,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:40:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:40:01,547 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:40:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:40:02,294 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-03-20 13:40:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:40:02,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 48 [2022-03-20 13:40:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:40:02,296 INFO L225 Difference]: With dead ends: 85 [2022-03-20 13:40:02,296 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 13:40:02,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:40:02,297 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:40:02,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 210 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:40:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 13:40:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-03-20 13:40:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 21 states have call successors, (21), 13 states have call predecessors, (21), 11 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 13:40:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-03-20 13:40:02,343 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 48 [2022-03-20 13:40:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:40:02,343 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-03-20 13:40:02,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 13:40:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-03-20 13:40:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:40:02,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:40:02,346 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:40:02,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 13:40:02,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:40:02,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:40:02,762 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:40:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:40:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 231187056, now seen corresponding path program 4 times [2022-03-20 13:40:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:40:02,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451327749] [2022-03-20 13:41:33,443 WARN L232 SmtUtils]: Spent 1.51m on a formula simplification. DAG size of input: 195 DAG size of output: 188 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 13:41:33,446 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:41:33,447 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:41:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash -537905665, now seen corresponding path program 1 times [2022-03-20 13:41:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:41:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397974042] [2022-03-20 13:41:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:41:33,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:41:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610454499] [2022-03-20 13:41:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:41:33,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:41:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:41:33,459 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 13:41:33,460 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 13:41:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:41:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:41:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:42:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:42:00,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:42:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:42:02,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:42:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397974042] [2022-03-20 13:42:02,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:42:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610454499] [2022-03-20 13:42:02,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610454499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:42:02,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:42:02,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-20 13:43:44,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:43:44,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451327749] [2022-03-20 13:43:44,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451327749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:43:44,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:43:44,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:43:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338442993] [2022-03-20 13:43:44,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:43:44,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:43:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:43:44,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:43:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1034, Unknown=29, NotChecked=0, Total=1260 [2022-03-20 13:43:44,147 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 13:44:09,509 WARN L232 SmtUtils]: Spent 25.08s on a formula simplification. DAG size of input: 101 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:44:35,183 WARN L232 SmtUtils]: Spent 23.47s on a formula simplification. DAG size of input: 147 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:44:50,758 WARN L232 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 25 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:44:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:44:59,218 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-03-20 13:44:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 13:44:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 53 [2022-03-20 13:44:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:44:59,221 INFO L225 Difference]: With dead ends: 88 [2022-03-20 13:44:59,222 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 13:44:59,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 177.0s TimeCoverageRelationStatistics Valid=279, Invalid=1494, Unknown=33, NotChecked=0, Total=1806 [2022-03-20 13:44:59,223 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:44:59,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 245 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 139 Unchecked, 1.0s Time] [2022-03-20 13:44:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 13:44:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-20 13:44:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 16 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 13:44:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-03-20 13:44:59,260 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 53 [2022-03-20 13:44:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:44:59,260 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-03-20 13:44:59,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 17 states have internal predecessors, (27), 8 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 13:44:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-03-20 13:44:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 13:44:59,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:44:59,266 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:44:59,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 13:44:59,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:44:59,476 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:44:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:44:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1149770209, now seen corresponding path program 5 times [2022-03-20 13:44:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:44:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506915892] [2022-03-20 13:47:01,604 WARN L232 SmtUtils]: Spent 2.03m on a formula simplification. DAG size of input: 192 DAG size of output: 187 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 13:47:01,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:47:01,607 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:47:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -624200656, now seen corresponding path program 1 times [2022-03-20 13:47:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:47:01,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943485257] [2022-03-20 13:47:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:47:01,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:47:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920508026] [2022-03-20 13:47:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:47:01,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:47:01,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:47:01,620 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 13:47:01,621 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 13:47:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:47:01,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 13:47:01,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:47:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:47:22,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:47:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 13:47:24,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:47:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943485257] [2022-03-20 13:47:24,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:47:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920508026] [2022-03-20 13:47:24,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920508026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:47:24,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:47:24,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13