/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-scaling/sqrt1-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:44:21,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:44:21,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:44:21,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 18:44:21,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:44:21,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:44:21,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:44:21,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:44:21,821 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:44:21,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:44:21,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:44:21,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:44:21,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:44:21,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:44:21,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:44:21,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:44:21,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:44:21,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:44:21,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:44:21,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:44:21,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:44:21,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:44:21,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:44:21,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:44:21,826 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:44:21,826 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:44:21,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:44:21,826 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:44:21,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:44:22,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:44:22,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:44:22,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:44:22,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:44:22,089 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:44:22,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2022-04-06 18:44:22,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d823248f4/363d8f59a290476b9795a6be8a651218/FLAGc04b58b6c [2022-04-06 18:44:22,527 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:44:22,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2022-04-06 18:44:22,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d823248f4/363d8f59a290476b9795a6be8a651218/FLAGc04b58b6c [2022-04-06 18:44:22,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d823248f4/363d8f59a290476b9795a6be8a651218 [2022-04-06 18:44:22,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:44:22,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:44:22,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:44:22,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:44:22,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:44:22,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:44:22" (1/1) ... [2022-04-06 18:44:22,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7585f67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:22, skipping insertion in model container [2022-04-06 18:44:22,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:44:22" (1/1) ... [2022-04-06 18:44:22,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:44:22,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:44:23,094 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c[520,533] [2022-04-06 18:44:23,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:44:23,122 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:44:23,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c[520,533] [2022-04-06 18:44:23,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:44:23,162 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:44:23,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23 WrapperNode [2022-04-06 18:44:23,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:44:23,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:44:23,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:44:23,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:44:23,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:44:23,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:44:23,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:44:23,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:44:23,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (1/1) ... [2022-04-06 18:44:23,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:44:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:44:23,226 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) [2022-04-06 18:44:23,231 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 [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 18:44:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:44:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:44:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:44:23,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:44:23,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:44:23,305 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:44:23,308 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:44:23,430 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:44:23,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:44:23,435 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:44:23,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:44:23 BoogieIcfgContainer [2022-04-06 18:44:23,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:44:23,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:44:23,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:44:23,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:44:23,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:44:22" (1/3) ... [2022-04-06 18:44:23,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793ddf15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:44:23, skipping insertion in model container [2022-04-06 18:44:23,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:44:23" (2/3) ... [2022-04-06 18:44:23,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793ddf15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:44:23, skipping insertion in model container [2022-04-06 18:44:23,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:44:23" (3/3) ... [2022-04-06 18:44:23,474 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound5.c [2022-04-06 18:44:23,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:44:23,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:44:23,536 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:44:23,546 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 [2022-04-06 18:44:23,546 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:44:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 18:44:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:44:23,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:44:23,580 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:44:23,580 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:44:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:44:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-04-06 18:44:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:23,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1065606146] [2022-04-06 18:44:23,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:44:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-04-06 18:44:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:44:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849624823] [2022-04-06 18:44:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:44:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:23,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:44:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:23,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:44:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:44:23,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:44:23,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849624823] [2022-04-06 18:44:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849624823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:23,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:44:23,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:44:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1065606146] [2022-04-06 18:44:23,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1065606146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:23,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:23,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:44:23,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874992447] [2022-04-06 18:44:23,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:44:23,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:44:23,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:44:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:44:23,832 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:44:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:44:23,919 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-04-06 18:44:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:44:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 18:44:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:44:23,931 INFO L225 Difference]: With dead ends: 53 [2022-04-06 18:44:23,931 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 18:44:23,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:44:23,938 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:44:23,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:44:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 18:44:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 18:44:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 18:44:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-04-06 18:44:23,968 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-04-06 18:44:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:44:23,968 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-04-06 18:44:23,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:44:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-06 18:44:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:44:23,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:44:23,970 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:44:23,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:44:23,970 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:44:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:44:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-04-06 18:44:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768404782] [2022-04-06 18:44:23,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:44:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-04-06 18:44:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:44:23,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037573819] [2022-04-06 18:44:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:44:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:44:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:24,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:44:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:44:24,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:44:24,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037573819] [2022-04-06 18:44:24,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037573819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:44:24,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:44:24,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768404782] [2022-04-06 18:44:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768404782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:44:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165343893] [2022-04-06 18:44:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:44:24,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:44:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:44:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:44:24,105 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:44:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:44:24,307 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-06 18:44:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:44:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 18:44:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:44:24,318 INFO L225 Difference]: With dead ends: 40 [2022-04-06 18:44:24,318 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 18:44:24,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:44:24,322 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:44:24,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:44:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 18:44:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-06 18:44:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 18:44:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 18:44:24,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-04-06 18:44:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:44:24,344 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 18:44:24,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 18:44:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 18:44:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 18:44:24,345 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:44:24,345 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:44:24,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:44:24,345 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:44:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:44:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-04-06 18:44:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641050719] [2022-04-06 18:44:24,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:44:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-04-06 18:44:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:44:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853463678] [2022-04-06 18:44:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:44:24,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:44:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704520955] [2022-04-06 18:44:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:44:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:44:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:44:24,368 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) [2022-04-06 18:44:24,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:44:24,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:44:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:44:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:44:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:44:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:44:24,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:44:24,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:44:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853463678] [2022-04-06 18:44:24,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:44:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704520955] [2022-04-06 18:44:24,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704520955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:44:24,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:44:24,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641050719] [2022-04-06 18:44:24,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641050719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:44:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190676387] [2022-04-06 18:44:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:44:24,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:44:24,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:44:24,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:44:24,538 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 18:44:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:44:24,578 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-06 18:44:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:44:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 22 [2022-04-06 18:44:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:44:24,579 INFO L225 Difference]: With dead ends: 44 [2022-04-06 18:44:24,579 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 18:44:24,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:44:24,580 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:44:24,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:44:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 18:44:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 18:44:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 18:44:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-04-06 18:44:24,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-04-06 18:44:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:44:24,590 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-04-06 18:44:24,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 18:44:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-04-06 18:44:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 18:44:24,591 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:44:24,591 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:44:24,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 18:44:24,813 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 [2022-04-06 18:44:24,814 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:44:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:44:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-04-06 18:44:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64352554] [2022-04-06 18:44:24,815 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:44:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-04-06 18:44:24,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:44:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119768411] [2022-04-06 18:44:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:24,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:44:24,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:44:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541673430] [2022-04-06 18:44:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:44:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:44:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:44:24,827 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) [2022-04-06 18:44:24,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:44:24,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:44:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:44:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:44:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:44:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 18:44:24,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:44:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:44:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119768411] [2022-04-06 18:44:24,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:44:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541673430] [2022-04-06 18:44:24,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541673430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:44:24,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:44:24,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64352554] [2022-04-06 18:44:24,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64352554] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:24,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:24,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:44:24,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807472702] [2022-04-06 18:44:24,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:44:24,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:44:24,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:44:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:44:24,974 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 18:44:25,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:44:25,027 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-04-06 18:44:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:44:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 27 [2022-04-06 18:44:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:44:25,030 INFO L225 Difference]: With dead ends: 48 [2022-04-06 18:44:25,030 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 18:44:25,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:44:25,036 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:44:25,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 106 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:44:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 18:44:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 18:44:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 18:44:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-04-06 18:44:25,059 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-04-06 18:44:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:44:25,059 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-04-06 18:44:25,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-04-06 18:44:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-04-06 18:44:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 18:44:25,060 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:44:25,060 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:44:25,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:44:25,260 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 [2022-04-06 18:44:25,261 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:44:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:44:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-04-06 18:44:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:44:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129326525] [2022-04-06 18:44:27,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:44:27,964 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:44:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-04-06 18:44:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:44:27,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003013632] [2022-04-06 18:44:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:44:27,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:44:27,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623130113] [2022-04-06 18:44:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:44:27,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:44:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:44:27,980 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) [2022-04-06 18:44:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:44:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:44:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 18:44:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:44:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:44:30,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:44:30,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:44:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003013632] [2022-04-06 18:44:30,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:44:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623130113] [2022-04-06 18:44:30,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623130113] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:44:30,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:44:30,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:45:08,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:45:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129326525] [2022-04-06 18:45:08,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129326525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:45:08,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:45:08,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:45:08,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153954261] [2022-04-06 18:45:08,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:45:08,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:45:08,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:45:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:45:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=456, Unknown=12, NotChecked=0, Total=552 [2022-04-06 18:45:08,964 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 18:45:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:45:09,245 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-04-06 18:45:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:45:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-04-06 18:45:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:45:09,248 INFO L225 Difference]: With dead ends: 49 [2022-04-06 18:45:09,248 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 18:45:09,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=105, Invalid=585, Unknown=12, NotChecked=0, Total=702 [2022-04-06 18:45:09,249 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:45:09,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 244 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 84 Unchecked, 0.0s Time] [2022-04-06 18:45:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 18:45:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 18:45:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 18:45:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-04-06 18:45:09,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 34 [2022-04-06 18:45:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:45:09,262 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-04-06 18:45:09,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 18:45:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-04-06 18:45:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 18:45:09,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:45:09,264 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:45:09,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:45:09,479 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 [2022-04-06 18:45:09,480 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:45:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:45:09,480 INFO L85 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2022-04-06 18:45:09,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:45:09,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756244987] [2022-04-06 18:45:11,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:45:11,197 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:45:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1173408528, now seen corresponding path program 1 times [2022-04-06 18:45:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:45:11,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063170688] [2022-04-06 18:45:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:45:11,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:45:11,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:45:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041263412] [2022-04-06 18:45:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:45:11,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:45:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:45:11,211 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) [2022-04-06 18:45:11,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 18:45:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:45:11,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 18:45:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:45:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:45:25,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:45:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:45:25,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:45:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063170688] [2022-04-06 18:45:25,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:45:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041263412] [2022-04-06 18:45:25,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041263412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:45:25,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:45:25,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 18:46:04,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:46:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756244987] [2022-04-06 18:46:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756244987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:46:04,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:46:04,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 18:46:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419141837] [2022-04-06 18:46:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:46:04,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 18:46:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:46:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 18:46:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=666, Unknown=13, NotChecked=0, Total=812 [2022-04-06 18:46:04,670 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 18:46:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:46:09,889 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-04-06 18:46:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:46:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2022-04-06 18:46:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:46:09,891 INFO L225 Difference]: With dead ends: 52 [2022-04-06 18:46:09,891 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 18:46:09,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=166, Invalid=875, Unknown=15, NotChecked=0, Total=1056 [2022-04-06 18:46:09,892 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:46:09,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 217 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-04-06 18:46:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 18:46:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-06 18:46:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 18:46:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-04-06 18:46:09,908 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 39 [2022-04-06 18:46:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:46:09,908 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-04-06 18:46:09,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 18:46:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-04-06 18:46:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 18:46:09,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:46:09,909 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:46:09,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 18:46:10,113 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 [2022-04-06 18:46:10,114 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:46:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:46:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2022-04-06 18:46:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:46:10,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1703292653] [2022-04-06 18:46:13,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:46:13,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:46:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 404335836, now seen corresponding path program 1 times [2022-04-06 18:46:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:46:13,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505756280] [2022-04-06 18:46:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:46:13,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:46:13,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:46:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468160932] [2022-04-06 18:46:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:46:13,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:46:13,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:46:13,695 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) [2022-04-06 18:46:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 18:46:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:46:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 18:46:13,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:46:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 18:46:31,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:46:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 18:46:32,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:46:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505756280] [2022-04-06 18:46:32,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:46:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468160932] [2022-04-06 18:46:32,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468160932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:46:32,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:46:32,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 18:47:09,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:09,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1703292653] [2022-04-06 18:47:09,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1703292653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:09,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 18:47:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161652030] [2022-04-06 18:47:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:09,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 18:47:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 18:47:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=666, Unknown=12, NotChecked=0, Total=812 [2022-04-06 18:47:09,972 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 18:47:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:47:18,352 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-04-06 18:47:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:47:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-04-06 18:47:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:47:18,353 INFO L225 Difference]: With dead ends: 62 [2022-04-06 18:47:18,353 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 18:47:18,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=188, Invalid=989, Unknown=13, NotChecked=0, Total=1190 [2022-04-06 18:47:18,355 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:47:18,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 190 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 89 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-04-06 18:47:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 18:47:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 18:47:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 12 states have call successors, (12), 11 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 18:47:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-04-06 18:47:18,377 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 44 [2022-04-06 18:47:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:47:18,377 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-04-06 18:47:18,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.25) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 18:47:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-04-06 18:47:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:47:18,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:47:18,378 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:47:18,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 18:47:18,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:47:18,583 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:47:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:47:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-04-06 18:47:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098494024] [2022-04-06 18:47:20,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:47:20,429 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:47:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1495863447, now seen corresponding path program 1 times [2022-04-06 18:47:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:47:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949774001] [2022-04-06 18:47:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:47:20,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:47:20,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599246252] [2022-04-06 18:47:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:47:20,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:47:20,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:47:20,445 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) [2022-04-06 18:47:20,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 18:47:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:47:20,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:47:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:47:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:47:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:47:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:47:20,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:47:20,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949774001] [2022-04-06 18:47:20,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:47:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599246252] [2022-04-06 18:47:20,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599246252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:47:20,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:47:20,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 18:47:59,176 WARN L232 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 18:47:59,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:47:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098494024] [2022-04-06 18:47:59,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098494024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:47:59,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:47:59,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:47:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358336822] [2022-04-06 18:47:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:47:59,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:47:59,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:47:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:47:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-04-06 18:47:59,309 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:48:13,551 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 18:48:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:48:13,881 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-04-06 18:48:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:48:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-06 18:48:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:48:13,882 INFO L225 Difference]: With dead ends: 56 [2022-04-06 18:48:13,882 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:48:13,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-04-06 18:48:13,883 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:48:13,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 186 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 146 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-04-06 18:48:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:48:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:48:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 18:48:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:48:13,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-04-06 18:48:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:48:13,885 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:48:13,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 18:48:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:48:13,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:48:13,887 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:48:13,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 18:48:14,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:48:14,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:49:48,646 WARN L232 SmtUtils]: Spent 1.57m on a formula simplification. DAG size of input: 630 DAG size of output: 302 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:52:12,437 WARN L232 SmtUtils]: Spent 2.32m on a formula simplification. DAG size of input: 645 DAG size of output: 311 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:55:00,431 WARN L232 SmtUtils]: Spent 2.80m on a formula simplification. DAG size of input: 638 DAG size of output: 315 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:57:17,445 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-04-06 18:57:17,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-04-06 18:57:17,446 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:256) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeIcfgHoareAnnotation(BasicCegarLoop.java:1164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:856) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:351) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 39 more [2022-04-06 18:57:17,449 INFO L158 Benchmark]: Toolchain (without parser) took 774505.67ms. Allocated memory was 191.9MB in the beginning and 276.8MB in the end (delta: 84.9MB). Free memory was 145.6MB in the beginning and 109.6MB in the end (delta: 36.0MB). Peak memory consumption was 137.1MB. Max. memory is 8.0GB. [2022-04-06 18:57:17,450 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 191.9MB. Free memory is still 161.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:57:17,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.49ms. Allocated memory is still 191.9MB. Free memory was 145.4MB in the beginning and 170.3MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 18:57:17,450 INFO L158 Benchmark]: Boogie Preprocessor took 36.07ms. Allocated memory is still 191.9MB. Free memory was 170.3MB in the beginning and 169.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 18:57:17,450 INFO L158 Benchmark]: RCFGBuilder took 234.84ms. Allocated memory is still 191.9MB. Free memory was 168.8MB in the beginning and 158.8MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 18:57:17,450 INFO L158 Benchmark]: TraceAbstraction took 774010.80ms. Allocated memory was 191.9MB in the beginning and 276.8MB in the end (delta: 84.9MB). Free memory was 158.3MB in the beginning and 109.6MB in the end (delta: 48.8MB). Peak memory consumption was 150.5MB. Max. memory is 8.0GB. [2022-04-06 18:57:17,451 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 191.9MB. Free memory is still 161.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.49ms. Allocated memory is still 191.9MB. Free memory was 145.4MB in the beginning and 170.3MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.07ms. Allocated memory is still 191.9MB. Free memory was 170.3MB in the beginning and 169.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 234.84ms. Allocated memory is still 191.9MB. Free memory was 168.8MB in the beginning and 158.8MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 774010.80ms. Allocated memory was 191.9MB in the beginning and 276.8MB in the end (delta: 84.9MB). Free memory was 158.3MB in the beginning and 109.6MB in the end (delta: 48.8MB). Peak memory consumption was 150.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...