/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/dijkstra-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:16:50,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:16:50,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:16:50,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:16:50,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:16:50,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:16:50,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:16:50,466 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 14:16:50,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:16:50,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:16:50,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:16:50,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:16:50,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:16:50,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:16:50,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:16:50,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:16:50,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:16:50,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:16:50,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:16:50,479 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:16:50,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:16:50,480 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:16:50,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:16:50,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:16:50,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:16:50,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:16:50,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:16:50,723 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:16:50,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-03-20 14:16:50,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f2bb9da/a51e0213af9c4d53850c14262a075308/FLAG031c10d64 [2022-03-20 14:16:51,173 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:16:51,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-03-20 14:16:51,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f2bb9da/a51e0213af9c4d53850c14262a075308/FLAG031c10d64 [2022-03-20 14:16:51,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f2bb9da/a51e0213af9c4d53850c14262a075308 [2022-03-20 14:16:51,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:16:51,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:16:51,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:16:51,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:16:51,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:16:51,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422b6269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51, skipping insertion in model container [2022-03-20 14:16:51,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:16:51,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:16:51,363 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/dijkstra-u_valuebound10.c[525,538] [2022-03-20 14:16:51,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:16:51,389 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:16:51,397 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/dijkstra-u_valuebound10.c[525,538] [2022-03-20 14:16:51,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:16:51,418 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:16:51,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51 WrapperNode [2022-03-20 14:16:51,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:16:51,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:16:51,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:16:51,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:16:51,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:16:51,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:16:51,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:16:51,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:16:51,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (1/1) ... [2022-03-20 14:16:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:16:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:16:51,488 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 14:16:51,508 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 14:16:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:16:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:16:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:16:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:16:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:16:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:16:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:16:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:16:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:16:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:16:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 14:16:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:16:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:16:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:16:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:16:51,600 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:16:51,602 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:16:51,755 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:16:51,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:16:51,761 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 14:16:51,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:16:51 BoogieIcfgContainer [2022-03-20 14:16:51,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:16:51,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:16:51,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:16:51,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:16:51,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:16:51" (1/3) ... [2022-03-20 14:16:51,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712397b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:16:51, skipping insertion in model container [2022-03-20 14:16:51,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:16:51" (2/3) ... [2022-03-20 14:16:51,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3712397b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:16:51, skipping insertion in model container [2022-03-20 14:16:51,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:16:51" (3/3) ... [2022-03-20 14:16:51,768 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2022-03-20 14:16:51,772 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:16:51,772 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:16:51,804 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:16:51,809 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 14:16:51,809 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:16:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 14:16:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:16:51,826 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:16:51,826 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:16:51,827 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:16:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:16:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-03-20 14:16:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020789506] [2022-03-20 14:16:51,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:16:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 2 times [2022-03-20 14:16:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:16:51,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557380188] [2022-03-20 14:16:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:16:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:16:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:52,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:16:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:52,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:16:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:52,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:16:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:16:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:16:52,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557380188] [2022-03-20 14:16:52,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557380188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:52,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:52,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:16:52,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:16:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020789506] [2022-03-20 14:16:52,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020789506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:52,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:52,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:16:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719166991] [2022-03-20 14:16:52,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:16:52,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:16:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:16:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:16:52,083 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:16:54,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:16:56,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:16:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:16:56,280 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-03-20 14:16:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:16:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 14:16:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:16:56,288 INFO L225 Difference]: With dead ends: 69 [2022-03-20 14:16:56,288 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 14:16:56,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:16:56,293 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:16:56,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 14:16:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 14:16:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 14:16:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 14:16:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-20 14:16:56,333 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-03-20 14:16:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:16:56,334 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-20 14:16:56,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:16:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-20 14:16:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 14:16:56,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:16:56,336 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:16:56,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:16:56,336 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:16:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:16:56,337 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-03-20 14:16:56,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:56,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [883953181] [2022-03-20 14:16:56,338 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:16:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 2 times [2022-03-20 14:16:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:16:56,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644448144] [2022-03-20 14:16:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:16:56,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:16:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:56,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:16:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:16:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:56,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:16:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:16:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:16:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:16:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644448144] [2022-03-20 14:16:56,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644448144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:56,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:56,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:16:56,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:16:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [883953181] [2022-03-20 14:16:56,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [883953181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:56,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:56,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:16:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60007568] [2022-03-20 14:16:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:16:56,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:16:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:16:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:16:56,608 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:17:01,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:03,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:05,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:07,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:17:09,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:17:11,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:17:13,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 14:17:15,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:18,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:17:18,046 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2022-03-20 14:17:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:17:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 14:17:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:17:18,049 INFO L225 Difference]: With dead ends: 67 [2022-03-20 14:17:18,049 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 14:17:18,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:17:18,051 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-03-20 14:17:18,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 57 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 8 Unknown, 0 Unchecked, 21.3s Time] [2022-03-20 14:17:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 14:17:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-03-20 14:17:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:17:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-20 14:17:18,069 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2022-03-20 14:17:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:17:18,069 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-20 14:17:18,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:17:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-20 14:17:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 14:17:18,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:17:18,070 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] [2022-03-20 14:17:18,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:17:18,071 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:17:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:17:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-03-20 14:17:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:18,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362984020] [2022-03-20 14:17:18,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:17:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 2 times [2022-03-20 14:17:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:17:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929798330] [2022-03-20 14:17:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:17:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:17:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:17:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:17:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:17:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:17:18,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 14:17:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:17:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:17:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:17:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929798330] [2022-03-20 14:17:18,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929798330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:18,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:18,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:17:18,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:17:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362984020] [2022-03-20 14:17:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362984020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:18,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:18,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 14:17:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881607095] [2022-03-20 14:17:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:17:18,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 14:17:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 14:17:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 14:17:18,205 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:17:20,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:22,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:29,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 14:17:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:17:29,924 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-03-20 14:17:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 14:17:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-20 14:17:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:17:29,925 INFO L225 Difference]: With dead ends: 76 [2022-03-20 14:17:29,926 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 14:17:29,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 14:17:29,927 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 85 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:17:29,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 48 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 223 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-03-20 14:17:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 14:17:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-03-20 14:17:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 14:17:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2022-03-20 14:17:29,946 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 26 [2022-03-20 14:17:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:17:29,946 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2022-03-20 14:17:29,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 14:17:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2022-03-20 14:17:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 14:17:29,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:17:29,948 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:17:29,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 14:17:29,948 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:17:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:17:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-03-20 14:17:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039643322] [2022-03-20 14:17:29,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:17:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 2 times [2022-03-20 14:17:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:17:29,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88980032] [2022-03-20 14:17:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:17:29,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:17:29,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971407556] [2022-03-20 14:17:29,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:17:29,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:17:29,976 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 14:17:29,988 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 14:17:30,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:17:30,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:17:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:17:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:17:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:17:30,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:17:30,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:17:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88980032] [2022-03-20 14:17:30,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:17:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971407556] [2022-03-20 14:17:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971407556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:30,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:30,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:17:30,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:17:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039643322] [2022-03-20 14:17:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039643322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:30,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:17:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504269532] [2022-03-20 14:17:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:17:30,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:17:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:17:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:17:30,249 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:17:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:17:30,779 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2022-03-20 14:17:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:17:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 14:17:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:17:30,780 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:17:30,780 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 14:17:30,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 14:17:30,782 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:17:30,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:17:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 14:17:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 14:17:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 21 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 14:17:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-03-20 14:17:30,797 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 34 [2022-03-20 14:17:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:17:30,797 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-03-20 14:17:30,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:17:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-03-20 14:17:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 14:17:30,798 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:17:30,798 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:17:30,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 14:17:31,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:31,008 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:17:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:17:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash -965267381, now seen corresponding path program 1 times [2022-03-20 14:17:31,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:31,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [859175115] [2022-03-20 14:17:31,010 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:17:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash -965267381, now seen corresponding path program 2 times [2022-03-20 14:17:31,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:17:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325971583] [2022-03-20 14:17:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:31,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:17:31,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:17:31,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699003198] [2022-03-20 14:17:31,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:17:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:17:31,026 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 14:17:31,034 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 14:17:31,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:17:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:17:31,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:17:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:17:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:17:31,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:17:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:17:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325971583] [2022-03-20 14:17:31,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:17:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699003198] [2022-03-20 14:17:31,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699003198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:31,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:17:31,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:17:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [859175115] [2022-03-20 14:17:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [859175115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:17:31,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:17:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:17:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240259975] [2022-03-20 14:17:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:17:31,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:17:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:17:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:17:31,236 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:17:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:17:31,807 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-03-20 14:17:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:17:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 14:17:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:17:31,810 INFO L225 Difference]: With dead ends: 68 [2022-03-20 14:17:31,810 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 14:17:31,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 14:17:31,811 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:17:31,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 14:17:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 14:17:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 14:17:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 14:17:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-03-20 14:17:31,826 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 36 [2022-03-20 14:17:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:17:31,826 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-03-20 14:17:31,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:17:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-03-20 14:17:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:17:31,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:17:31,828 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:17:31,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 14:17:32,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:32,033 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:17:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:17:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1670386034, now seen corresponding path program 1 times [2022-03-20 14:17:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:32,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826820872] [2022-03-20 14:17:32,035 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:17:32,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1670386034, now seen corresponding path program 2 times [2022-03-20 14:17:32,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:17:32,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712341253] [2022-03-20 14:17:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:17:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:17:32,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:17:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371547130] [2022-03-20 14:17:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:17:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:17:32,057 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 14:17:32,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process