/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/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 16:27:39,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 16:27:39,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 16:27:40,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 16:27:40,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 16:27:40,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 16:27:40,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 16:27:40,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 16:27:40,051 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 16:27:40,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 16:27:40,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 16:27:40,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 16:27:40,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 16:27:40,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 16:27:40,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 16:27:40,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 16:27:40,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:27:40,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 16:27:40,054 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 16:27:40,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 16:27:40,055 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 16:27:40,055 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 16:27:40,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 16:27:40,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 16:27:40,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 16:27:40,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 16:27:40,267 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 16:27:40,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-03-20 16:27:40,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e600efcf/e50bd3c2d55f4e3891804e0f97375a89/FLAGa73d78164 [2022-03-20 16:27:40,681 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 16:27:40,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-03-20 16:27:40,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e600efcf/e50bd3c2d55f4e3891804e0f97375a89/FLAGa73d78164 [2022-03-20 16:27:40,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e600efcf/e50bd3c2d55f4e3891804e0f97375a89 [2022-03-20 16:27:40,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 16:27:40,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 16:27:40,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 16:27:40,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 16:27:40,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 16:27:40,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337781b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40, skipping insertion in model container [2022-03-20 16:27:40,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 16:27:40,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 16:27:40,830 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/prod4br-ll_unwindbound2.c[524,537] [2022-03-20 16:27:40,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:27:40,851 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 16:27:40,858 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/prod4br-ll_unwindbound2.c[524,537] [2022-03-20 16:27:40,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 16:27:40,871 INFO L208 MainTranslator]: Completed translation [2022-03-20 16:27:40,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40 WrapperNode [2022-03-20 16:27:40,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 16:27:40,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 16:27:40,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 16:27:40,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 16:27:40,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 16:27:40,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 16:27:40,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 16:27:40,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 16:27:40,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (1/1) ... [2022-03-20 16:27:40,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 16:27:40,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:40,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 16:27:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 16:27:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 16:27:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 16:27:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 16:27:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 16:27:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 16:27:41,006 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 16:27:41,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 16:27:41,151 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 16:27:41,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 16:27:41,159 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 16:27:41,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:41 BoogieIcfgContainer [2022-03-20 16:27:41,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 16:27:41,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 16:27:41,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 16:27:41,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 16:27:41,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:27:40" (1/3) ... [2022-03-20 16:27:41,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acb1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:41, skipping insertion in model container [2022-03-20 16:27:41,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:27:40" (2/3) ... [2022-03-20 16:27:41,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acb1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:27:41, skipping insertion in model container [2022-03-20 16:27:41,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:27:41" (3/3) ... [2022-03-20 16:27:41,166 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2022-03-20 16:27:41,169 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 16:27:41,170 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 16:27:41,197 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 16:27:41,202 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 16:27:41,202 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 16:27:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 16:27:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 16:27:41,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:41,228 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:41,229 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:41,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2022-03-20 16:27:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:41,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387612643] [2022-03-20 16:27:41,257 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:27:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 2 times [2022-03-20 16:27:41,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:41,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609413694] [2022-03-20 16:27:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:41,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:27:41,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 16:27:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:27:41,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 16:27:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 16:27:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609413694] [2022-03-20 16:27:41,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609413694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:41,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:41,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:27:41,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387612643] [2022-03-20 16:27:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387612643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:41,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:41,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 16:27:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527627987] [2022-03-20 16:27:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:41,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 16:27:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 16:27:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 16:27:41,477 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2022-03-20 16:27:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:41,556 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-03-20 16:27:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 16:27:41,558 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 [2022-03-20 16:27:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:41,563 INFO L225 Difference]: With dead ends: 56 [2022-03-20 16:27:41,564 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 16:27:41,566 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 [2022-03-20 16:27:41,569 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:41,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:27:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 16:27:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 16:27:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 16:27:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-20 16:27:41,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-03-20 16:27:41,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:41,600 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-20 16:27:41,601 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) [2022-03-20 16:27:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-20 16:27:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 16:27:41,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:41,603 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:41,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 16:27:41,603 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2022-03-20 16:27:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097693978] [2022-03-20 16:27:41,607 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:27:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 2 times [2022-03-20 16:27:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:41,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170493566] [2022-03-20 16:27:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:41,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:41,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351005414] [2022-03-20 16:27:41,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:41,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:41,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:41,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 16:27:41,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:27:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 16:27:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:41,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:27:41,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170493566] [2022-03-20 16:27:41,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351005414] [2022-03-20 16:27:41,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351005414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:41,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:41,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 16:27:41,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:41,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097693978] [2022-03-20 16:27:41,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097693978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:41,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:41,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 16:27:41,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103390005] [2022-03-20 16:27:41,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:41,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 16:27:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 16:27:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 16:27:41,772 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 16:27:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:41,792 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-20 16:27:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 16:27:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 16:27:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:41,793 INFO L225 Difference]: With dead ends: 37 [2022-03-20 16:27:41,794 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 16:27:41,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 16:27:41,795 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:41,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:27:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 16:27:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 16:27:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 16:27:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-20 16:27:41,804 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-03-20 16:27:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:41,804 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-20 16:27:41,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 16:27:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-20 16:27:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 16:27:41,806 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:41,806 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:41,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:42,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:42,020 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2022-03-20 16:27:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162810709] [2022-03-20 16:27:42,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:27:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 2 times [2022-03-20 16:27:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:42,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473998135] [2022-03-20 16:27:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:42,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281044192] [2022-03-20 16:27:42,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:42,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:42,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 16:27:42,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 16:27:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 16:27:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:42,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:27:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473998135] [2022-03-20 16:27:42,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281044192] [2022-03-20 16:27:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281044192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:42,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:42,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:27:42,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:42,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162810709] [2022-03-20 16:27:42,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162810709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:42,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:42,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:27:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443184999] [2022-03-20 16:27:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:42,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:27:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:27:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 16:27:42,203 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:27:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:42,279 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-03-20 16:27:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 16:27:42,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2022-03-20 16:27:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:42,280 INFO L225 Difference]: With dead ends: 42 [2022-03-20 16:27:42,280 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 16:27:42,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 16:27:42,283 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:42,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:27:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 16:27:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-03-20 16:27:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 16:27:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-20 16:27:42,293 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-03-20 16:27:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:42,293 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-20 16:27:42,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 16:27:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-20 16:27:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 16:27:42,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:42,294 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, 1, 1] [2022-03-20 16:27:42,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:42,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 16:27:42,514 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2022-03-20 16:27:42,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:42,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723967000] [2022-03-20 16:27:42,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:27:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 2 times [2022-03-20 16:27:42,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687262545] [2022-03-20 16:27:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:42,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:42,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180154110] [2022-03-20 16:27:42,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:42,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:42,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:42,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 16:27:42,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:27:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 16:27:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:42,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:27:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687262545] [2022-03-20 16:27:43,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180154110] [2022-03-20 16:27:43,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180154110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 16:27:43,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 16:27:43,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 16:27:43,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723967000] [2022-03-20 16:27:43,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723967000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:43,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:43,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 16:27:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419590664] [2022-03-20 16:27:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:43,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 16:27:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 16:27:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 16:27:43,066 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:27:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:43,233 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 16:27:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 16:27:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 16:27:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:43,235 INFO L225 Difference]: With dead ends: 50 [2022-03-20 16:27:43,235 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 16:27:43,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-20 16:27:43,236 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:43,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 16:27:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 16:27:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-03-20 16:27:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 16:27:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-03-20 16:27:43,244 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 24 [2022-03-20 16:27:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:43,244 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-03-20 16:27:43,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:27:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-03-20 16:27:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 16:27:43,245 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:43,245 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:43,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:43,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:43,464 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2022-03-20 16:27:43,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:43,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178492097] [2022-03-20 16:27:43,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:27:43,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:27:43,476 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:27:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 2 times [2022-03-20 16:27:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:43,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311421967] [2022-03-20 16:27:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:43,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:43,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667759046] [2022-03-20 16:27:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:43,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:43,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 16:27:43,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:27:43,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 16:27:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:43,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:27:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311421967] [2022-03-20 16:27:43,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667759046] [2022-03-20 16:27:43,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667759046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 16:27:43,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 16:27:43,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-20 16:27:43,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178492097] [2022-03-20 16:27:43,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178492097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:43,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:43,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 16:27:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664263575] [2022-03-20 16:27:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:43,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 16:27:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 16:27:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 16:27:43,637 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 16:27:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:43,671 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-03-20 16:27:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 16:27:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-20 16:27:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:43,672 INFO L225 Difference]: With dead ends: 73 [2022-03-20 16:27:43,672 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 16:27:43,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 16:27:43,673 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:43,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:27:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 16:27:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-03-20 16:27:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 45 states have internal predecessors, (57), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 16:27:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2022-03-20 16:27:43,682 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 27 [2022-03-20 16:27:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:43,683 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2022-03-20 16:27:43,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 16:27:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2022-03-20 16:27:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 16:27:43,683 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:43,683 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:43,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:43,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:43,900 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:43,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2022-03-20 16:27:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:43,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416607030] [2022-03-20 16:27:43,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 16:27:43,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 16:27:43,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 16:27:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 2 times [2022-03-20 16:27:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563584833] [2022-03-20 16:27:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:43,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:43,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833230371] [2022-03-20 16:27:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:43,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:43,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 16:27:43,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:27:43,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 16:27:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:44,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 16:27:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 16:27:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563584833] [2022-03-20 16:27:44,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833230371] [2022-03-20 16:27:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833230371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 16:27:44,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 16:27:44,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 16:27:44,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416607030] [2022-03-20 16:27:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416607030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:44,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:44,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 16:27:44,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386694427] [2022-03-20 16:27:44,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:44,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 16:27:44,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:44,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 16:27:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 16:27:44,431 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:27:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:44,632 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-03-20 16:27:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 16:27:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-20 16:27:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:44,633 INFO L225 Difference]: With dead ends: 76 [2022-03-20 16:27:44,633 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 16:27:44,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-20 16:27:44,633 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:44,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 128 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 16:27:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 16:27:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-03-20 16:27:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 51 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 16:27:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-03-20 16:27:44,643 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 27 [2022-03-20 16:27:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:44,643 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-03-20 16:27:44,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 16:27:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-03-20 16:27:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 16:27:44,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:44,644 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, 1, 1] [2022-03-20 16:27:44,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:44,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:44,852 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1613968938, now seen corresponding path program 1 times [2022-03-20 16:27:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:44,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480480478] [2022-03-20 16:27:44,853 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 16:27:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1613968938, now seen corresponding path program 2 times [2022-03-20 16:27:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:44,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199668658] [2022-03-20 16:27:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:44,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 16:27:44,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467848878] [2022-03-20 16:27:44,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 16:27:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 16:27:44,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 16:27:44,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 16:27:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 16:27:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 16:27:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 16:27:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 16:27:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 16:27:44,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 16:27:44,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 16:27:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199668658] [2022-03-20 16:27:44,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 16:27:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467848878] [2022-03-20 16:27:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467848878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:44,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:44,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 16:27:44,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 16:27:44,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480480478] [2022-03-20 16:27:44,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480480478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 16:27:44,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 16:27:44,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 16:27:44,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237643508] [2022-03-20 16:27:44,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 16:27:44,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 16:27:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 16:27:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 16:27:44,962 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 16:27:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 16:27:45,048 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-03-20 16:27:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 16:27:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-03-20 16:27:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 16:27:45,050 INFO L225 Difference]: With dead ends: 85 [2022-03-20 16:27:45,050 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 16:27:45,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 16:27:45,052 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 16:27:45,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 176 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 16:27:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 16:27:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-03-20 16:27:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 48 states have internal predecessors, (61), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 16:27:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-03-20 16:27:45,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 29 [2022-03-20 16:27:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 16:27:45,069 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-03-20 16:27:45,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 16:27:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-03-20 16:27:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 16:27:45,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 16:27:45,073 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 16:27:45,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 16:27:45,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 16:27:45,287 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 16:27:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 16:27:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2022-03-20 16:27:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 16:27:45,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77699140] [2022-03-20 16:27:45,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={1=1, 2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 16:27:45,753 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 16:27:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash -769537496, now seen corresponding path program 1 times [2022-03-20 16:27:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 16:27:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110107661] [2022-03-20 16:27:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 16:27:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 16:27:45,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 16:27:45,765 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:91) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:289) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) 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:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) 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: Cannot name open terms at de.uni_freiburg.informatik.ultimate.logic.NoopScript.annotate(NoopScript.java:471) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertCodeBlocks.java:109) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:313) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 40 more [2022-03-20 16:27:45,771 INFO L158 Benchmark]: Toolchain (without parser) took 5071.70ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 132.9MB in the beginning and 132.5MB in the end (delta: 405.8kB). Peak memory consumption was 72.8MB. Max. memory is 8.0GB. [2022-03-20 16:27:45,771 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 16:27:45,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.35ms. Allocated memory is still 184.5MB. Free memory was 132.7MB in the beginning and 161.5MB in the end (delta: -28.8MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-20 16:27:45,772 INFO L158 Benchmark]: Boogie Preprocessor took 26.21ms. Allocated memory is still 184.5MB. Free memory was 161.5MB in the beginning and 159.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 16:27:45,772 INFO L158 Benchmark]: RCFGBuilder took 261.78ms. Allocated memory is still 184.5MB. Free memory was 159.8MB in the beginning and 148.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 16:27:45,772 INFO L158 Benchmark]: TraceAbstraction took 4608.96ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 148.3MB in the beginning and 132.5MB in the end (delta: 15.8MB). Peak memory consumption was 87.5MB. Max. memory is 8.0GB. [2022-03-20 16:27:45,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.35ms. Allocated memory is still 184.5MB. Free memory was 132.7MB in the beginning and 161.5MB in the end (delta: -28.8MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.21ms. Allocated memory is still 184.5MB. Free memory was 161.5MB in the beginning and 159.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 261.78ms. Allocated memory is still 184.5MB. Free memory was 159.8MB in the beginning and 148.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 4608.96ms. Allocated memory was 184.5MB in the beginning and 255.9MB in the end (delta: 71.3MB). Free memory was 148.3MB in the beginning and 132.5MB in the end (delta: 15.8MB). Peak memory consumption was 87.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 16:27:45,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...