/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:39:47,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:39:47,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:39:47,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:39:47,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 12:39:47,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:39:47,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:39:47,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:39:47,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:39:47,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:39:47,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:39:47,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:39:47,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:39:47,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:39:47,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:39:47,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:39:47,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:39:47,930 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:39:47,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:39:47,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:39:47,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:39:48,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:39:48,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:39:48,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:39:48,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:39:48,084 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:39:48,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-03-18 12:39:48,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5474242/4f1f3c8f3a7d40f6b0dab929736fa32c/FLAGe58acaa01 [2022-03-18 12:39:48,451 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:39:48,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-03-18 12:39:48,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5474242/4f1f3c8f3a7d40f6b0dab929736fa32c/FLAGe58acaa01 [2022-03-18 12:39:48,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd5474242/4f1f3c8f3a7d40f6b0dab929736fa32c [2022-03-18 12:39:48,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:39:48,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:39:48,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:39:48,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:39:48,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:39:48,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8046e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48, skipping insertion in model container [2022-03-18 12:39:48,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:39:48,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:39:48,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-03-18 12:39:48,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:39:48,639 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:39:48,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-03-18 12:39:48,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:39:48,657 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:39:48,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48 WrapperNode [2022-03-18 12:39:48,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:39:48,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:39:48,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:39:48,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:39:48,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:39:48,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:39:48,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:39:48,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:39:48,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (1/1) ... [2022-03-18 12:39:48,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:39:48,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:48,708 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) [2022-03-18 12:39:48,712 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 [2022-03-18 12:39:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:39:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:39:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:39:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:39:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:39:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:39:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:39:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:39:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:39:48,775 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:39:48,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:39:48,863 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:39:48,869 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:39:48,870 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 12:39:48,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:39:48 BoogieIcfgContainer [2022-03-18 12:39:48,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:39:48,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:39:48,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:39:48,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:39:48,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:39:48" (1/3) ... [2022-03-18 12:39:48,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdc1e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:39:48, skipping insertion in model container [2022-03-18 12:39:48,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:48" (2/3) ... [2022-03-18 12:39:48,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cdc1e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:39:48, skipping insertion in model container [2022-03-18 12:39:48,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:39:48" (3/3) ... [2022-03-18 12:39:48,880 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-03-18 12:39:48,883 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:39:48,883 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:39:48,921 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:39:48,925 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-18 12:39:48,925 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:39:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 12:39:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:39:48,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:48,938 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:48,939 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 1 times [2022-03-18 12:39:48,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:48,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487196718] [2022-03-18 12:39:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487196718] [2022-03-18 12:39:49,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487196718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:39:49,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:39:49,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 12:39:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792779512] [2022-03-18 12:39:49,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 12:39:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 12:39:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:39:49,081 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,104 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-03-18 12:39:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 12:39:49,109 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 12:39:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,112 INFO L225 Difference]: With dead ends: 41 [2022-03-18 12:39:49,112 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 12:39:49,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:39:49,116 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 12:39:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 12:39:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-03-18 12:39:49,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-03-18 12:39:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,137 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-03-18 12:39:49,137 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-03-18 12:39:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:39:49,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,137 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:39:49,138 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:49,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 1 times [2022-03-18 12:39:49,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394459196] [2022-03-18 12:39:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:49,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394459196] [2022-03-18 12:39:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394459196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:39:49,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:39:49,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 12:39:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531846295] [2022-03-18 12:39:49,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:39:49,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:39:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:39:49,237 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,322 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-03-18 12:39:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:39:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 12:39:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,323 INFO L225 Difference]: With dead ends: 34 [2022-03-18 12:39:49,324 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 12:39:49,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:49,326 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:39:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 12:39:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 12:39:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-03-18 12:39:49,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 16 [2022-03-18 12:39:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,331 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-03-18 12:39:49,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-03-18 12:39:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:39:49,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,332 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 12:39:49,332 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 1 times [2022-03-18 12:39:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318733734] [2022-03-18 12:39:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:49,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318733734] [2022-03-18 12:39:49,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318733734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:39:49,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:39:49,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:39:49,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485811102] [2022-03-18 12:39:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:39:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:39:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:39:49,370 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,400 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-03-18 12:39:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:39:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 12:39:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,401 INFO L225 Difference]: With dead ends: 34 [2022-03-18 12:39:49,401 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 12:39:49,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:39:49,402 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,402 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 12:39:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 12:39:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-03-18 12:39:49,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2022-03-18 12:39:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,407 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-03-18 12:39:49,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-03-18 12:39:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 12:39:49,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,407 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 12:39:49,408 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 1 times [2022-03-18 12:39:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:49,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787989719] [2022-03-18 12:39:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:49,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787989719] [2022-03-18 12:39:49,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787989719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:39:49,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:39:49,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:39:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491523843] [2022-03-18 12:39:49,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:39:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:39:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:39:49,439 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,464 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2022-03-18 12:39:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:39:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 12:39:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,465 INFO L225 Difference]: With dead ends: 43 [2022-03-18 12:39:49,465 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 12:39:49,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:39:49,466 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 12:39:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 12:39:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-03-18 12:39:49,492 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2022-03-18 12:39:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,492 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-03-18 12:39:49,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-03-18 12:39:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 12:39:49,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,493 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 12:39:49,493 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 669375650, now seen corresponding path program 1 times [2022-03-18 12:39:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802442037] [2022-03-18 12:39:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802442037] [2022-03-18 12:39:49,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802442037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:39:49,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:39:49,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 12:39:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308698276] [2022-03-18 12:39:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:39:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:39:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:39:49,541 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,592 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-18 12:39:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:39:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-18 12:39:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,592 INFO L225 Difference]: With dead ends: 40 [2022-03-18 12:39:49,593 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 12:39:49,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:39:49,599 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 12:39:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 12:39:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-03-18 12:39:49,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-03-18 12:39:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,604 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-03-18 12:39:49,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-03-18 12:39:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:39:49,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,604 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 12:39:49,605 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 735022287, now seen corresponding path program 1 times [2022-03-18 12:39:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647867407] [2022-03-18 12:39:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647867407] [2022-03-18 12:39:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647867407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552156581] [2022-03-18 12:39:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:49,684 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) [2022-03-18 12:39:49,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:39:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:39:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:49,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:49,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552156581] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:49,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:39:49,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-03-18 12:39:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137043091] [2022-03-18 12:39:49,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:49,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:39:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:39:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:49,905 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:49,925 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-18 12:39:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:39:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 12:39:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:49,926 INFO L225 Difference]: With dead ends: 35 [2022-03-18 12:39:49,926 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 12:39:49,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:49,927 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:49,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 12:39:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 12:39:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-03-18 12:39:49,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2022-03-18 12:39:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:49,931 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-03-18 12:39:49,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-03-18 12:39:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:39:49,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:49,931 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:49,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:50,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 12:39:50,148 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -528072081, now seen corresponding path program 1 times [2022-03-18 12:39:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656948177] [2022-03-18 12:39:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:50,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:50,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656948177] [2022-03-18 12:39:50,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656948177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:50,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383866469] [2022-03-18 12:39:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:50,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:50,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:50,224 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) [2022-03-18 12:39:50,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:39:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:39:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:50,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:50,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383866469] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:50,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:39:50,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-03-18 12:39:50,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728251341] [2022-03-18 12:39:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:39:50,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:39:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:39:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:50,359 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:50,378 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-03-18 12:39:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:39:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 12:39:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:50,379 INFO L225 Difference]: With dead ends: 30 [2022-03-18 12:39:50,380 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 12:39:50,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:50,381 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:50,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 12:39:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-18 12:39:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-03-18 12:39:50,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2022-03-18 12:39:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:50,391 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-03-18 12:39:50,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-03-18 12:39:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 12:39:50,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:50,395 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:50,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:50,611 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,SelfDestructingSolverStorable6 [2022-03-18 12:39:50,611 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 1 times [2022-03-18 12:39:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712971263] [2022-03-18 12:39:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:50,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:50,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712971263] [2022-03-18 12:39:50,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712971263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:50,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321687017] [2022-03-18 12:39:50,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:50,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:50,680 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) [2022-03-18 12:39:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:39:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:39:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:50,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:50,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321687017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:50,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:50,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-18 12:39:50,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666687243] [2022-03-18 12:39:50,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:50,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:39:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:39:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:39:50,843 INFO L87 Difference]: Start difference. First operand 22 states and 27 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:50,888 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-03-18 12:39:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:39:50,888 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-18 12:39:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:50,889 INFO L225 Difference]: With dead ends: 33 [2022-03-18 12:39:50,889 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 12:39:50,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:39:50,889 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:50,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 12:39:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-18 12:39:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-03-18 12:39:50,893 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 20 [2022-03-18 12:39:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:50,893 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-03-18 12:39:50,893 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-03-18 12:39:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 12:39:50,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:50,894 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:50,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:51,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:51,110 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1745318674, now seen corresponding path program 1 times [2022-03-18 12:39:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:51,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334709819] [2022-03-18 12:39:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334709819] [2022-03-18 12:39:51,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334709819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:51,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804582248] [2022-03-18 12:39:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:51,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:51,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:51,171 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) [2022-03-18 12:39:51,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:39:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 12:39:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:51,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:51,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804582248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:51,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:51,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4] total 13 [2022-03-18 12:39:51,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559497938] [2022-03-18 12:39:51,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:51,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 12:39:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 12:39:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 12:39:51,325 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:51,489 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2022-03-18 12:39:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 12:39:51,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-18 12:39:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:51,491 INFO L225 Difference]: With dead ends: 63 [2022-03-18 12:39:51,491 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 12:39:51,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-03-18 12:39:51,492 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:51,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:39:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 12:39:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-03-18 12:39:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-03-18 12:39:51,498 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 20 [2022-03-18 12:39:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:51,498 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-03-18 12:39:51,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-03-18 12:39:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 12:39:51,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:51,499 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:51,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:51,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:51,717 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 1 times [2022-03-18 12:39:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:51,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834046761] [2022-03-18 12:39:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:51,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:51,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834046761] [2022-03-18 12:39:51,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834046761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:51,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004920629] [2022-03-18 12:39:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:51,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:51,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:51,791 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) [2022-03-18 12:39:51,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:39:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:39:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:51,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004920629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:51,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:51,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-18 12:39:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263512127] [2022-03-18 12:39:51,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:51,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 12:39:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 12:39:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 12:39:51,922 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:52,058 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-18 12:39:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:39:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-18 12:39:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:52,060 INFO L225 Difference]: With dead ends: 57 [2022-03-18 12:39:52,060 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 12:39:52,060 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:39:52,061 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:52,062 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:39:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 12:39:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-03-18 12:39:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-03-18 12:39:52,072 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 21 [2022-03-18 12:39:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:52,072 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-03-18 12:39:52,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-03-18 12:39:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 12:39:52,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:52,074 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:52,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:52,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 12:39:52,291 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:52,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:52,291 INFO L85 PathProgramCache]: Analyzing trace with hash -439116189, now seen corresponding path program 2 times [2022-03-18 12:39:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:52,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656251979] [2022-03-18 12:39:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:52,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656251979] [2022-03-18 12:39:52,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656251979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875039370] [2022-03-18 12:39:52,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:39:52,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:52,328 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) [2022-03-18 12:39:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 12:39:52,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:39:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:39:52,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:52,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875039370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:52,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:52,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-18 12:39:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824705254] [2022-03-18 12:39:52,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:52,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:39:52,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:39:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:39:52,442 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:52,477 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-18 12:39:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 12:39:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-18 12:39:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:52,478 INFO L225 Difference]: With dead ends: 57 [2022-03-18 12:39:52,478 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 12:39:52,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:39:52,478 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:52,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 12:39:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 12:39:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2022-03-18 12:39:52,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 22 [2022-03-18 12:39:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:52,488 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2022-03-18 12:39:52,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2022-03-18 12:39:52,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 12:39:52,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:52,490 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:52,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 12:39:52,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:52,706 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 38994402, now seen corresponding path program 2 times [2022-03-18 12:39:52,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:52,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784795852] [2022-03-18 12:39:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:52,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:39:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784795852] [2022-03-18 12:39:52,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784795852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741583060] [2022-03-18 12:39:52,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:39:52,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:52,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:52,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 12:39:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:39:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:39:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:39:52,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:52,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741583060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:52,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:52,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 17 [2022-03-18 12:39:52,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373295131] [2022-03-18 12:39:52,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:52,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 12:39:52,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 12:39:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:39:52,957 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:53,329 INFO L93 Difference]: Finished difference Result 87 states and 126 transitions. [2022-03-18 12:39:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 12:39:53,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-18 12:39:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:53,330 INFO L225 Difference]: With dead ends: 87 [2022-03-18 12:39:53,330 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 12:39:53,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:39:53,331 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:53,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 79 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:39:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 12:39:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-03-18 12:39:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2022-03-18 12:39:53,335 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 22 [2022-03-18 12:39:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:53,335 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2022-03-18 12:39:53,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2022-03-18 12:39:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:39:53,336 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:53,336 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:53,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:53,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:53,551 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1409588607, now seen corresponding path program 2 times [2022-03-18 12:39:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152242997] [2022-03-18 12:39:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:39:53,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152242997] [2022-03-18 12:39:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152242997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995287628] [2022-03-18 12:39:53,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:39:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:53,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:53,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:53,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 12:39:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:39:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 12:39:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:39:53,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:39:53,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995287628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:53,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:53,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-03-18 12:39:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388574310] [2022-03-18 12:39:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:53,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 12:39:53,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 12:39:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-18 12:39:53,765 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:54,143 INFO L93 Difference]: Finished difference Result 80 states and 116 transitions. [2022-03-18 12:39:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 12:39:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 12:39:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:54,144 INFO L225 Difference]: With dead ends: 80 [2022-03-18 12:39:54,144 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 12:39:54,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:39:54,145 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:54,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:39:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 12:39:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-03-18 12:39:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-03-18 12:39:54,149 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 23 [2022-03-18 12:39:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:54,149 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-03-18 12:39:54,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-03-18 12:39:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 12:39:54,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:54,150 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:54,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:54,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:39:54,364 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 731459730, now seen corresponding path program 3 times [2022-03-18 12:39:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:54,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308959026] [2022-03-18 12:39:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 12:39:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308959026] [2022-03-18 12:39:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308959026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782548897] [2022-03-18 12:39:54,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:39:54,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:54,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:54,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:39:54,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 12:39:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 12:39:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:39:54,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:39:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782548897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:54,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:54,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 20 [2022-03-18 12:39:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038089348] [2022-03-18 12:39:54,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:54,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 12:39:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 12:39:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-18 12:39:54,706 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:55,953 INFO L93 Difference]: Finished difference Result 133 states and 188 transitions. [2022-03-18 12:39:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 12:39:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-18 12:39:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:55,954 INFO L225 Difference]: With dead ends: 133 [2022-03-18 12:39:55,954 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 12:39:55,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 12:39:55,955 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:55,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 96 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:39:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 12:39:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2022-03-18 12:39:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2022-03-18 12:39:55,961 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 24 [2022-03-18 12:39:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:55,961 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2022-03-18 12:39:55,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2022-03-18 12:39:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 12:39:55,962 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:55,962 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:55,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:56,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 12:39:56,177 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1097749168, now seen corresponding path program 4 times [2022-03-18 12:39:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:56,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169728319] [2022-03-18 12:39:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:39:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169728319] [2022-03-18 12:39:56,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169728319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110909983] [2022-03-18 12:39:56,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:39:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:56,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:56,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 12:39:56,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:39:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 12:39:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:39:56,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:39:56,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110909983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:56,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:56,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-18 12:39:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717960458] [2022-03-18 12:39:56,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:56,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:39:56,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:39:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:39:56,343 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:56,416 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2022-03-18 12:39:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 12:39:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 12:39:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:56,417 INFO L225 Difference]: With dead ends: 88 [2022-03-18 12:39:56,417 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 12:39:56,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:39:56,418 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:56,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 12:39:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-18 12:39:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-03-18 12:39:56,424 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 25 [2022-03-18 12:39:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:56,424 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-03-18 12:39:56,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-03-18 12:39:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 12:39:56,424 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:56,424 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:56,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:56,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 12:39:56,639 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1022340144, now seen corresponding path program 3 times [2022-03-18 12:39:56,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:56,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531078130] [2022-03-18 12:39:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:56,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:39:56,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531078130] [2022-03-18 12:39:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531078130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043611585] [2022-03-18 12:39:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:39:56,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:56,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:56,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 12:39:56,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:39:56,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:39:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:56,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 12:39:56,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043611585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:56,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:56,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-03-18 12:39:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483869290] [2022-03-18 12:39:56,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:56,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 12:39:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 12:39:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:39:56,890 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:57,772 INFO L93 Difference]: Finished difference Result 155 states and 224 transitions. [2022-03-18 12:39:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 12:39:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 12:39:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:57,773 INFO L225 Difference]: With dead ends: 155 [2022-03-18 12:39:57,773 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 12:39:57,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 12:39:57,775 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:57,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 85 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:39:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 12:39:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2022-03-18 12:39:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-03-18 12:39:57,782 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 25 [2022-03-18 12:39:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:57,782 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-03-18 12:39:57,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-03-18 12:39:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:39:57,782 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:57,782 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:57,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:57,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 12:39:57,995 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1205395922, now seen corresponding path program 3 times [2022-03-18 12:39:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578359366] [2022-03-18 12:39:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:58,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:39:58,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578359366] [2022-03-18 12:39:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578359366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951251315] [2022-03-18 12:39:58,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:39:58,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:58,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:58,104 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:58,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 12:39:58,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:39:58,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:39:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:39:58,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:39:58,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951251315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:58,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:58,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-03-18 12:39:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401125148] [2022-03-18 12:39:58,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:58,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 12:39:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 12:39:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:39:58,260 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:59,250 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2022-03-18 12:39:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 12:39:59,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 12:39:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:59,251 INFO L225 Difference]: With dead ends: 133 [2022-03-18 12:39:59,251 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 12:39:59,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=3051, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 12:39:59,252 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:59,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 72 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:39:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 12:39:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-03-18 12:39:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 82 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-03-18 12:39:59,258 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 26 [2022-03-18 12:39:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:59,258 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-03-18 12:39:59,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-03-18 12:39:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:39:59,259 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:59,259 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:59,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:59,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 12:39:59,466 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash -438714480, now seen corresponding path program 5 times [2022-03-18 12:39:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:59,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85018487] [2022-03-18 12:39:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:59,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:39:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:39:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85018487] [2022-03-18 12:39:59,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85018487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:39:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480185692] [2022-03-18 12:39:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:39:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:39:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:39:59,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:39:59,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 12:39:59,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-18 12:39:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:39:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 12:39:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:39:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:39:59,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:39:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 12:39:59,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480185692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:39:59,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:39:59,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-18 12:39:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792967425] [2022-03-18 12:39:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:39:59,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:39:59,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:39:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:39:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:39:59,632 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:39:59,686 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-03-18 12:39:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:39:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 12:39:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:39:59,687 INFO L225 Difference]: With dead ends: 110 [2022-03-18 12:39:59,687 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 12:39:59,688 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:39:59,688 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:39:59,688 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:39:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 12:39:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-18 12:39:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-03-18 12:39:59,693 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 27 [2022-03-18 12:39:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:39:59,693 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-03-18 12:39:59,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:39:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-03-18 12:39:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 12:39:59,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:39:59,694 INFO L500 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:39:59,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 12:39:59,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 12:39:59,907 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:39:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:39:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1284330801, now seen corresponding path program 6 times [2022-03-18 12:39:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:39:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309292847] [2022-03-18 12:39:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:39:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:39:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:39:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:39:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 12:40:00,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309292847] [2022-03-18 12:40:00,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309292847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941466390] [2022-03-18 12:40:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:40:00,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:00,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:00,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 12:40:00,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 12:40:00,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:40:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 12:40:00,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 12:40:00,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941466390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:00,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:00,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2022-03-18 12:40:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063190267] [2022-03-18 12:40:00,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:00,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 12:40:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 12:40:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:40:00,168 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:00,758 INFO L93 Difference]: Finished difference Result 185 states and 258 transitions. [2022-03-18 12:40:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 12:40:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 12:40:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:00,759 INFO L225 Difference]: With dead ends: 185 [2022-03-18 12:40:00,759 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 12:40:00,760 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 12:40:00,760 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:00,760 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 74 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:40:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 12:40:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2022-03-18 12:40:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-18 12:40:00,767 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 27 [2022-03-18 12:40:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:00,767 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-18 12:40:00,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-18 12:40:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 12:40:00,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:00,768 INFO L500 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:00,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:00,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:00,969 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash -67489470, now seen corresponding path program 4 times [2022-03-18 12:40:00,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:00,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65674698] [2022-03-18 12:40:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:40:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:01,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65674698] [2022-03-18 12:40:01,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65674698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:01,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576417779] [2022-03-18 12:40:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:40:01,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:01,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:01,070 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:01,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 12:40:01,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:40:01,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:01,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 12:40:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:40:01,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:40:01,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576417779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:01,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:01,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 12:40:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17676660] [2022-03-18 12:40:01,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:01,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 12:40:01,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 12:40:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-18 12:40:01,317 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:11,794 INFO L93 Difference]: Finished difference Result 382 states and 535 transitions. [2022-03-18 12:40:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-18 12:40:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 12:40:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:11,803 INFO L225 Difference]: With dead ends: 382 [2022-03-18 12:40:11,803 INFO L226 Difference]: Without dead ends: 343 [2022-03-18 12:40:11,808 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11603 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5490, Invalid=21570, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 12:40:11,808 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 376 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:11,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 104 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 12:40:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-03-18 12:40:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 108. [2022-03-18 12:40:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 103 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-18 12:40:11,820 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 28 [2022-03-18 12:40:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:11,820 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-18 12:40:11,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-18 12:40:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 12:40:11,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:11,821 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:11,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:12,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:12,023 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -409683135, now seen corresponding path program 4 times [2022-03-18 12:40:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891642905] [2022-03-18 12:40:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:40:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891642905] [2022-03-18 12:40:12,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891642905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515462544] [2022-03-18 12:40:12,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:40:12,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:12,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:12,164 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:12,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 12:40:12,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:40:12,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:40:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 12:40:12,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 12:40:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515462544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:12,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:12,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-03-18 12:40:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360955328] [2022-03-18 12:40:12,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:12,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 12:40:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 12:40:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-03-18 12:40:12,330 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:14,574 INFO L93 Difference]: Finished difference Result 177 states and 245 transitions. [2022-03-18 12:40:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 12:40:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 12:40:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:14,575 INFO L225 Difference]: With dead ends: 177 [2022-03-18 12:40:14,575 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 12:40:14,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=710, Invalid=4840, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 12:40:14,577 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 116 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:14,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 87 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:40:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 12:40:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2022-03-18 12:40:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 118 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 157 transitions. [2022-03-18 12:40:14,588 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 157 transitions. Word has length 29 [2022-03-18 12:40:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:14,589 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 157 transitions. [2022-03-18 12:40:14,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 157 transitions. [2022-03-18 12:40:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 12:40:14,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:14,589 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:14,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:14,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:14,795 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1456672573, now seen corresponding path program 7 times [2022-03-18 12:40:14,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:14,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362115941] [2022-03-18 12:40:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:14,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:14,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362115941] [2022-03-18 12:40:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362115941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:14,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297404970] [2022-03-18 12:40:14,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:40:14,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:14,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:14,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:14,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 12:40:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:40:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:14,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:40:14,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297404970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:14,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:14,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-18 12:40:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764380907] [2022-03-18 12:40:14,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:14,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 12:40:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 12:40:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:40:15,000 INFO L87 Difference]: Start difference. First operand 123 states and 157 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:15,135 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2022-03-18 12:40:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 12:40:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 12:40:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:15,136 INFO L225 Difference]: With dead ends: 137 [2022-03-18 12:40:15,136 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 12:40:15,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:40:15,136 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:15,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:40:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 12:40:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-18 12:40:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2857142857142858) internal successors, (153), 119 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-03-18 12:40:15,154 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 30 [2022-03-18 12:40:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:15,155 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-03-18 12:40:15,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-03-18 12:40:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 12:40:15,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:15,155 INFO L500 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:15,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:15,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:15,372 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 975209470, now seen corresponding path program 5 times [2022-03-18 12:40:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030582282] [2022-03-18 12:40:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:15,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 12:40:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030582282] [2022-03-18 12:40:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030582282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228077355] [2022-03-18 12:40:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:40:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:15,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:15,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 12:40:15,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 12:40:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 12:40:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:15,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228077355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 21 [2022-03-18 12:40:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219384559] [2022-03-18 12:40:15,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:15,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 12:40:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 12:40:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:40:15,896 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:18,008 INFO L93 Difference]: Finished difference Result 240 states and 320 transitions. [2022-03-18 12:40:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 12:40:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 12:40:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:18,009 INFO L225 Difference]: With dead ends: 240 [2022-03-18 12:40:18,010 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 12:40:18,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=726, Invalid=6414, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 12:40:18,011 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:18,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 106 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 12:40:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 12:40:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 134. [2022-03-18 12:40:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.2713178294573644) internal successors, (164), 129 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2022-03-18 12:40:18,025 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 31 [2022-03-18 12:40:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:18,026 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2022-03-18 12:40:18,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2022-03-18 12:40:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 12:40:18,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:18,026 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:18,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:18,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:18,231 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:18,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 8 times [2022-03-18 12:40:18,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:18,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073567852] [2022-03-18 12:40:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:18,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 12:40:18,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073567852] [2022-03-18 12:40:18,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073567852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204801634] [2022-03-18 12:40:18,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:40:18,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:18,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:18,288 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:18,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 12:40:18,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:40:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:40:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 12:40:18,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 12:40:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204801634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:18,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:18,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-18 12:40:18,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966766574] [2022-03-18 12:40:18,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:18,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 12:40:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 12:40:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:40:18,415 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:18,518 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2022-03-18 12:40:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:40:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-18 12:40:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:18,519 INFO L225 Difference]: With dead ends: 146 [2022-03-18 12:40:18,519 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 12:40:18,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:40:18,520 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:18,520 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:40:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 12:40:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-18 12:40:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-03-18 12:40:18,534 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 32 [2022-03-18 12:40:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:18,534 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-03-18 12:40:18,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-03-18 12:40:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 12:40:18,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:18,534 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:18,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:18,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:18,750 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1032467933, now seen corresponding path program 5 times [2022-03-18 12:40:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:18,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548840783] [2022-03-18 12:40:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:18,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:40:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548840783] [2022-03-18 12:40:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548840783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279568016] [2022-03-18 12:40:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:40:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:18,917 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:18,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 12:40:19,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:40:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:19,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 12:40:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:19,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:19,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279568016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:19,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:19,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-03-18 12:40:19,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696297132] [2022-03-18 12:40:19,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:19,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 12:40:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 12:40:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-03-18 12:40:19,204 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:23,902 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2022-03-18 12:40:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 12:40:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-18 12:40:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:23,903 INFO L225 Difference]: With dead ends: 223 [2022-03-18 12:40:23,903 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 12:40:23,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1028, Invalid=7902, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 12:40:23,905 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:23,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 117 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 12:40:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 12:40:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 146. [2022-03-18 12:40:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 141 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-03-18 12:40:23,919 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 32 [2022-03-18 12:40:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:23,919 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-03-18 12:40:23,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-03-18 12:40:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 12:40:23,920 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:23,920 INFO L500 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:23,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:24,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 12:40:24,124 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -38925857, now seen corresponding path program 6 times [2022-03-18 12:40:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136417795] [2022-03-18 12:40:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:24,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:40:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136417795] [2022-03-18 12:40:24,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136417795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:24,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200662785] [2022-03-18 12:40:24,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:40:24,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:24,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:24,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:24,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 12:40:24,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:40:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 12:40:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:40:24,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:40:24,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200662785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:24,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:24,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 25 [2022-03-18 12:40:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862501814] [2022-03-18 12:40:24,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:24,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 12:40:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 12:40:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-03-18 12:40:24,576 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:34,118 INFO L93 Difference]: Finished difference Result 727 states and 998 transitions. [2022-03-18 12:40:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 12:40:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 12:40:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:34,120 INFO L225 Difference]: With dead ends: 727 [2022-03-18 12:40:34,120 INFO L226 Difference]: Without dead ends: 697 [2022-03-18 12:40:34,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4703 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3039, Invalid=9843, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 12:40:34,121 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 703 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:34,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 114 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 12:40:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-03-18 12:40:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 202. [2022-03-18 12:40:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.2791878172588833) internal successors, (252), 197 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 256 transitions. [2022-03-18 12:40:34,145 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 256 transitions. Word has length 33 [2022-03-18 12:40:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:34,145 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 256 transitions. [2022-03-18 12:40:34,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 256 transitions. [2022-03-18 12:40:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 12:40:34,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:34,146 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:34,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:34,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 12:40:34,352 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:34,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:34,352 INFO L85 PathProgramCache]: Analyzing trace with hash 74673410, now seen corresponding path program 9 times [2022-03-18 12:40:34,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402548585] [2022-03-18 12:40:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:34,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:34,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 12:40:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402548585] [2022-03-18 12:40:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402548585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910828988] [2022-03-18 12:40:34,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:40:34,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:34,455 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:34,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 12:40:34,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:40:34,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:40:34,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:40:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-18 12:40:34,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-18 12:40:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910828988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:34,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:34,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-03-18 12:40:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261220109] [2022-03-18 12:40:34,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:34,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 12:40:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 12:40:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:40:34,662 INFO L87 Difference]: Start difference. First operand 202 states and 256 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:40:35,061 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2022-03-18 12:40:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 12:40:35,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-18 12:40:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:40:35,063 INFO L225 Difference]: With dead ends: 326 [2022-03-18 12:40:35,063 INFO L226 Difference]: Without dead ends: 309 [2022-03-18 12:40:35,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-03-18 12:40:35,064 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:40:35,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:40:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-03-18 12:40:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2022-03-18 12:40:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.3231939163498099) internal successors, (348), 263 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 352 transitions. [2022-03-18 12:40:35,090 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 352 transitions. Word has length 34 [2022-03-18 12:40:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:40:35,090 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 352 transitions. [2022-03-18 12:40:35,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:40:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 352 transitions. [2022-03-18 12:40:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 12:40:35,091 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:40:35,091 INFO L500 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:40:35,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 12:40:35,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 12:40:35,311 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:40:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:40:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -452274769, now seen corresponding path program 7 times [2022-03-18 12:40:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:40:35,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613320819] [2022-03-18 12:40:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:40:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:40:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:40:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:35,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:40:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613320819] [2022-03-18 12:40:35,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613320819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:40:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51085224] [2022-03-18 12:40:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:40:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:40:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:40:35,473 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:40:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 12:40:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:40:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 12:40:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:40:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:35,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:40:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:40:35,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51085224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:40:35,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:40:35,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 12:40:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903480635] [2022-03-18 12:40:35,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:40:35,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 12:40:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:40:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 12:40:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-03-18 12:40:35,861 INFO L87 Difference]: Start difference. First operand 268 states and 352 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:12,875 INFO L93 Difference]: Finished difference Result 1037 states and 1462 transitions. [2022-03-18 12:42:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2022-03-18 12:42:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 12:42:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:12,879 INFO L225 Difference]: With dead ends: 1037 [2022-03-18 12:42:12,879 INFO L226 Difference]: Without dead ends: 963 [2022-03-18 12:42:12,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60520 ImplicationChecksByTransitivity, 91.4s TimeCoverageRelationStatistics Valid=21899, Invalid=104481, Unknown=0, NotChecked=0, Total=126380 [2022-03-18 12:42:12,886 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 885 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:12,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 135 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-18 12:42:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-03-18 12:42:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 308. [2022-03-18 12:42:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.33003300330033) internal successors, (403), 303 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 407 transitions. [2022-03-18 12:42:12,923 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 407 transitions. Word has length 35 [2022-03-18 12:42:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:12,923 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 407 transitions. [2022-03-18 12:42:12,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 407 transitions. [2022-03-18 12:42:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 12:42:12,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:12,924 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:12,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:13,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:13,138 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 10 times [2022-03-18 12:42:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630919559] [2022-03-18 12:42:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:42:13,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630919559] [2022-03-18 12:42:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630919559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:13,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829493085] [2022-03-18 12:42:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:42:13,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:13,259 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:13,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 12:42:13,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:42:13,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 12:42:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:42:13,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 12:42:13,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829493085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:13,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:13,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 28 [2022-03-18 12:42:13,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495225499] [2022-03-18 12:42:13,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:13,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 12:42:13,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 12:42:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:42:13,703 INFO L87 Difference]: Start difference. First operand 308 states and 407 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:15,111 INFO L93 Difference]: Finished difference Result 385 states and 506 transitions. [2022-03-18 12:42:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 12:42:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-18 12:42:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:15,113 INFO L225 Difference]: With dead ends: 385 [2022-03-18 12:42:15,113 INFO L226 Difference]: Without dead ends: 339 [2022-03-18 12:42:15,113 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=472, Invalid=3434, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 12:42:15,114 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:15,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 111 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 12:42:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-18 12:42:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 290. [2022-03-18 12:42:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.3543859649122807) internal successors, (386), 285 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 390 transitions. [2022-03-18 12:42:15,145 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 390 transitions. Word has length 36 [2022-03-18 12:42:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:15,145 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 390 transitions. [2022-03-18 12:42:15,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 390 transitions. [2022-03-18 12:42:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 12:42:15,146 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:15,146 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:15,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:15,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 12:42:15,362 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1000596304, now seen corresponding path program 8 times [2022-03-18 12:42:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:15,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262852034] [2022-03-18 12:42:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:15,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 12:42:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262852034] [2022-03-18 12:42:15,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262852034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122726804] [2022-03-18 12:42:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:42:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:15,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:15,563 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 12:42:15,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:42:15,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:42:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 12:42:15,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 12:42:15,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122726804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:15,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:15,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-03-18 12:42:15,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369483774] [2022-03-18 12:42:15,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:15,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 12:42:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 12:42:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-03-18 12:42:15,800 INFO L87 Difference]: Start difference. First operand 290 states and 390 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:22,918 INFO L93 Difference]: Finished difference Result 455 states and 609 transitions. [2022-03-18 12:42:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 12:42:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 12:42:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:22,920 INFO L225 Difference]: With dead ends: 455 [2022-03-18 12:42:22,920 INFO L226 Difference]: Without dead ends: 394 [2022-03-18 12:42:22,921 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4540 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1486, Invalid=13034, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 12:42:22,921 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:22,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 130 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 12:42:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-18 12:42:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 327. [2022-03-18 12:42:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.31055900621118) internal successors, (422), 322 states have internal predecessors, (422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 426 transitions. [2022-03-18 12:42:22,954 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 426 transitions. Word has length 37 [2022-03-18 12:42:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:22,954 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 426 transitions. [2022-03-18 12:42:22,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 426 transitions. [2022-03-18 12:42:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 12:42:22,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:22,955 INFO L500 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:22,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:23,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:23,167 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:23,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash -916187166, now seen corresponding path program 9 times [2022-03-18 12:42:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:23,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061176153] [2022-03-18 12:42:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:23,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:23,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 12:42:23,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061176153] [2022-03-18 12:42:23,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061176153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199252230] [2022-03-18 12:42:23,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:42:23,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:23,373 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 12:42:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:42:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 12:42:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-18 12:42:23,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-18 12:42:24,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199252230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:24,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 17] total 43 [2022-03-18 12:42:24,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577517265] [2022-03-18 12:42:24,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:24,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 12:42:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 12:42:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 12:42:24,152 INFO L87 Difference]: Start difference. First operand 327 states and 426 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:42:39,857 INFO L93 Difference]: Finished difference Result 775 states and 1082 transitions. [2022-03-18 12:42:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-18 12:42:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-18 12:42:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:42:39,859 INFO L225 Difference]: With dead ends: 775 [2022-03-18 12:42:39,859 INFO L226 Difference]: Without dead ends: 687 [2022-03-18 12:42:39,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11926 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=3458, Invalid=35548, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 12:42:39,861 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 254 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5841 mSolverCounterSat, 987 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 5841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:42:39,861 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 187 Invalid, 6828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [987 Valid, 5841 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 12:42:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-18 12:42:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 406. [2022-03-18 12:42:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.3591022443890275) internal successors, (545), 401 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 549 transitions. [2022-03-18 12:42:39,918 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 549 transitions. Word has length 38 [2022-03-18 12:42:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:42:39,919 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 549 transitions. [2022-03-18 12:42:39,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:42:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 549 transitions. [2022-03-18 12:42:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 12:42:39,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:42:39,919 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:42:39,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 12:42:40,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 12:42:40,141 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:42:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:42:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 64930767, now seen corresponding path program 6 times [2022-03-18 12:42:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:42:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526667397] [2022-03-18 12:42:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:42:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:42:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:42:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:42:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 12:42:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:42:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526667397] [2022-03-18 12:42:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526667397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:42:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897013128] [2022-03-18 12:42:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:42:40,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:42:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:42:40,329 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:42:40,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 12:42:40,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:42:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:42:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 12:42:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:42:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 12:42:40,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:42:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 12:42:40,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897013128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:42:40,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:42:40,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-03-18 12:42:40,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689653436] [2022-03-18 12:42:40,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:42:40,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 12:42:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:42:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 12:42:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 12:42:40,897 INFO L87 Difference]: Start difference. First operand 406 states and 549 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:43:56,413 WARN L232 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:46:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:46:54,332 INFO L93 Difference]: Finished difference Result 1424 states and 2126 transitions. [2022-03-18 12:46:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 606 states. [2022-03-18 12:46:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-18 12:46:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:46:54,335 INFO L225 Difference]: With dead ends: 1424 [2022-03-18 12:46:54,335 INFO L226 Difference]: Without dead ends: 1284 [2022-03-18 12:46:54,351 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196303 ImplicationChecksByTransitivity, 233.7s TimeCoverageRelationStatistics Valid=44975, Invalid=363985, Unknown=0, NotChecked=0, Total=408960 [2022-03-18 12:46:54,352 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 1089 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 3155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 5776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3155 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:46:54,352 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 145 Invalid, 5776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3155 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2022-03-18 12:46:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-18 12:46:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 618. [2022-03-18 12:46:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 613 states have (on average 1.4143556280587275) internal successors, (867), 613 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:46:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 871 transitions. [2022-03-18 12:46:54,442 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 871 transitions. Word has length 39 [2022-03-18 12:46:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:46:54,442 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 871 transitions. [2022-03-18 12:46:54,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:46:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 871 transitions. [2022-03-18 12:46:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 12:46:54,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:46:54,443 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:46:54,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 12:46:54,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:46:54,655 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:46:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:46:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash -217359133, now seen corresponding path program 11 times [2022-03-18 12:46:54,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:46:54,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881165359] [2022-03-18 12:46:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:46:54,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:46:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:46:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:46:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:46:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:46:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:46:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881165359] [2022-03-18 12:46:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881165359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:46:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372373952] [2022-03-18 12:46:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:46:54,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:46:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:46:54,748 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:46:54,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 12:46:55,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-18 12:46:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:46:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:46:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:46:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 12:46:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:46:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 12:46:55,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372373952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:46:55,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:46:55,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-18 12:46:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470226618] [2022-03-18 12:46:55,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:46:55,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 12:46:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:46:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 12:46:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:46:55,248 INFO L87 Difference]: Start difference. First operand 618 states and 871 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:46:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:46:56,436 INFO L93 Difference]: Finished difference Result 908 states and 1343 transitions. [2022-03-18 12:46:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 12:46:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-18 12:46:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:46:56,438 INFO L225 Difference]: With dead ends: 908 [2022-03-18 12:46:56,438 INFO L226 Difference]: Without dead ends: 797 [2022-03-18 12:46:56,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 12:46:56,439 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:46:56,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 12:46:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-03-18 12:46:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 749. [2022-03-18 12:46:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 744 states have (on average 1.446236559139785) internal successors, (1076), 744 states have internal predecessors, (1076), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:46:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1080 transitions. [2022-03-18 12:46:56,525 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1080 transitions. Word has length 40 [2022-03-18 12:46:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:46:56,525 INFO L478 AbstractCegarLoop]: Abstraction has 749 states and 1080 transitions. [2022-03-18 12:46:56,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:46:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1080 transitions. [2022-03-18 12:46:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 12:46:56,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:46:56,526 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:46:56,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 12:46:56,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:46:56,731 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:46:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:46:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash -134128447, now seen corresponding path program 7 times [2022-03-18 12:46:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:46:56,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241131403] [2022-03-18 12:46:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:46:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:46:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:46:56,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:46:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:46:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:46:56,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:46:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241131403] [2022-03-18 12:46:56,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241131403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:46:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475174779] [2022-03-18 12:46:56,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:46:56,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:46:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:46:56,991 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:46:56,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 12:46:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:46:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 12:46:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:46:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-18 12:46:57,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:46:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-18 12:46:57,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475174779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:46:57,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:46:57,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-03-18 12:46:57,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031858711] [2022-03-18 12:46:57,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:46:57,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 12:46:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:46:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 12:46:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2022-03-18 12:46:57,320 INFO L87 Difference]: Start difference. First operand 749 states and 1080 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:47:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:47:50,948 INFO L93 Difference]: Finished difference Result 1062 states and 1539 transitions. [2022-03-18 12:47:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-18 12:47:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 12:47:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:47:50,950 INFO L225 Difference]: With dead ends: 1062 [2022-03-18 12:47:50,950 INFO L226 Difference]: Without dead ends: 941 [2022-03-18 12:47:50,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9823 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=2556, Invalid=26856, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 12:47:50,961 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:47:50,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 157 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-18 12:47:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-18 12:47:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 731. [2022-03-18 12:47:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 726 states have (on average 1.4338842975206612) internal successors, (1041), 726 states have internal predecessors, (1041), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:47:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1045 transitions. [2022-03-18 12:47:51,077 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1045 transitions. Word has length 41 [2022-03-18 12:47:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:47:51,077 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 1045 transitions. [2022-03-18 12:47:51,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:47:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1045 transitions. [2022-03-18 12:47:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 12:47:51,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:47:51,078 INFO L500 BasicCegarLoop]: trace histogram [11, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:47:51,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 12:47:51,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:47:51,287 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:47:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:47:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1889064288, now seen corresponding path program 8 times [2022-03-18 12:47:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:47:51,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075059017] [2022-03-18 12:47:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:47:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:47:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:47:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:47:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:47:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 12:47:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:47:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075059017] [2022-03-18 12:47:51,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075059017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:47:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804963084] [2022-03-18 12:47:51,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:47:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:47:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:47:51,567 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:47:51,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 12:47:51,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:47:51,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:47:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 12:47:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:47:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 12:47:51,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:47:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 12:47:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804963084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:47:51,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:47:51,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-03-18 12:47:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544567555] [2022-03-18 12:47:51,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:47:51,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 12:47:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:47:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 12:47:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 12:47:51,928 INFO L87 Difference]: Start difference. First operand 731 states and 1045 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:48:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:48:52,994 INFO L93 Difference]: Finished difference Result 1266 states and 1852 transitions. [2022-03-18 12:48:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-18 12:48:52,994 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 12:48:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:48:52,997 INFO L225 Difference]: With dead ends: 1266 [2022-03-18 12:48:52,997 INFO L226 Difference]: Without dead ends: 1065 [2022-03-18 12:48:52,998 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=2835, Invalid=31947, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 12:48:52,998 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 331 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:48:52,999 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 165 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-03-18 12:48:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-03-18 12:48:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 781. [2022-03-18 12:48:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 776 states have (on average 1.3994845360824741) internal successors, (1086), 776 states have internal predecessors, (1086), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:48:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1090 transitions. [2022-03-18 12:48:53,089 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1090 transitions. Word has length 41 [2022-03-18 12:48:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:48:53,089 INFO L478 AbstractCegarLoop]: Abstraction has 781 states and 1090 transitions. [2022-03-18 12:48:53,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:48:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1090 transitions. [2022-03-18 12:48:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 12:48:53,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:48:53,090 INFO L500 BasicCegarLoop]: trace histogram [12, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:48:53,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 12:48:53,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 12:48:53,303 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:48:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:48:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1996748607, now seen corresponding path program 10 times [2022-03-18 12:48:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:48:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23738314] [2022-03-18 12:48:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:48:53,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:48:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:48:53,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:48:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:48:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 12:48:53,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:48:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23738314] [2022-03-18 12:48:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23738314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:48:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008487737] [2022-03-18 12:48:53,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:48:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:48:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:48:53,633 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:48:53,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 12:48:53,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:48:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:48:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 12:48:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:48:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:48:53,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:48:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 12:48:54,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008487737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:48:54,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:48:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 36 [2022-03-18 12:48:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228981669] [2022-03-18 12:48:54,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:48:54,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 12:48:54,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:48:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 12:48:54,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 12:48:54,023 INFO L87 Difference]: Start difference. First operand 781 states and 1090 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:49:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:49:54,105 INFO L93 Difference]: Finished difference Result 1302 states and 1878 transitions. [2022-03-18 12:49:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-18 12:49:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 12:49:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:49:54,108 INFO L225 Difference]: With dead ends: 1302 [2022-03-18 12:49:54,108 INFO L226 Difference]: Without dead ends: 1099 [2022-03-18 12:49:54,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14390 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=3225, Invalid=38595, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 12:49:54,110 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 367 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 4700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:49:54,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 198 Invalid, 4700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-03-18 12:49:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-18 12:49:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 761. [2022-03-18 12:49:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 756 states have (on average 1.3928571428571428) internal successors, (1053), 756 states have internal predecessors, (1053), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:49:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1057 transitions. [2022-03-18 12:49:54,218 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1057 transitions. Word has length 43 [2022-03-18 12:49:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:49:54,218 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 1057 transitions. [2022-03-18 12:49:54,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:49:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1057 transitions. [2022-03-18 12:49:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 12:49:54,220 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:49:54,220 INFO L500 BasicCegarLoop]: trace histogram [13, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:49:54,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 12:49:54,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 12:49:54,435 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:49:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:49:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1917907724, now seen corresponding path program 12 times [2022-03-18 12:49:54,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:49:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982021248] [2022-03-18 12:49:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:49:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:49:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:49:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:49:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:49:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 12:49:54,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:49:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982021248] [2022-03-18 12:49:54,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982021248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:49:54,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85778308] [2022-03-18 12:49:54,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:49:54,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:49:54,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:49:54,706 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:49:54,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 12:49:54,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:49:54,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:49:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 12:49:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:49:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 12:49:54,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:49:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 12:49:55,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85778308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:49:55,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:49:55,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7, 7] total 33 [2022-03-18 12:49:55,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417779637] [2022-03-18 12:49:55,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:49:55,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 12:49:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:49:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 12:49:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:49:55,098 INFO L87 Difference]: Start difference. First operand 761 states and 1057 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:06,238 INFO L93 Difference]: Finished difference Result 1534 states and 2235 transitions. [2022-03-18 12:50:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-03-18 12:50:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-18 12:50:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:06,241 INFO L225 Difference]: With dead ends: 1534 [2022-03-18 12:50:06,241 INFO L226 Difference]: Without dead ends: 1293 [2022-03-18 12:50:06,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27284 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4302, Invalid=67254, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 12:50:06,245 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 314 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 5565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:06,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 167 Invalid, 5565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 12:50:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-03-18 12:50:06,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 871. [2022-03-18 12:50:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 866 states have (on average 1.3591224018475752) internal successors, (1177), 866 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1181 transitions. [2022-03-18 12:50:06,351 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1181 transitions. Word has length 44 [2022-03-18 12:50:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:06,351 INFO L478 AbstractCegarLoop]: Abstraction has 871 states and 1181 transitions. [2022-03-18 12:50:06,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1181 transitions. [2022-03-18 12:50:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 12:50:06,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:06,353 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:06,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:06,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:06,567 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1997077488, now seen corresponding path program 13 times [2022-03-18 12:50:06,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:06,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107412815] [2022-03-18 12:50:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:06,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-18 12:50:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107412815] [2022-03-18 12:50:06,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107412815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:06,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105372772] [2022-03-18 12:50:06,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:50:06,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:06,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:06,692 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:06,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 12:50:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 12:50:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-18 12:50:06,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-18 12:50:06,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105372772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:06,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:06,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-18 12:50:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762195431] [2022-03-18 12:50:06,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:06,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 12:50:06,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 12:50:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:50:06,900 INFO L87 Difference]: Start difference. First operand 871 states and 1181 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:07,588 INFO L93 Difference]: Finished difference Result 994 states and 1338 transitions. [2022-03-18 12:50:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 12:50:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 12:50:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:07,591 INFO L225 Difference]: With dead ends: 994 [2022-03-18 12:50:07,591 INFO L226 Difference]: Without dead ends: 957 [2022-03-18 12:50:07,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:50:07,592 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:07,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:50:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-18 12:50:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 898. [2022-03-18 12:50:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 893 states have (on average 1.3583426651735722) internal successors, (1213), 893 states have internal predecessors, (1213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1217 transitions. [2022-03-18 12:50:07,703 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1217 transitions. Word has length 45 [2022-03-18 12:50:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:07,703 INFO L478 AbstractCegarLoop]: Abstraction has 898 states and 1217 transitions. [2022-03-18 12:50:07,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1217 transitions. [2022-03-18 12:50:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 12:50:07,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:07,705 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:07,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:07,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 12:50:07,919 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1812505534, now seen corresponding path program 11 times [2022-03-18 12:50:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743913170] [2022-03-18 12:50:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:07,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 12:50:08,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743913170] [2022-03-18 12:50:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743913170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320986561] [2022-03-18 12:50:08,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:50:08,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:08,188 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:50:08,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 12:50:12,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 12:50:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 12:50:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 12:50:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 12:50:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320986561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:12,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:12,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-03-18 12:50:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12334588] [2022-03-18 12:50:12,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:12,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 12:50:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 12:50:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 12:50:12,920 INFO L87 Difference]: Start difference. First operand 898 states and 1217 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:51:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:51:50,866 INFO L93 Difference]: Finished difference Result 2248 states and 3115 transitions. [2022-03-18 12:51:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 446 states. [2022-03-18 12:51:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 12:51:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:51:50,870 INFO L225 Difference]: With dead ends: 2248 [2022-03-18 12:51:50,870 INFO L226 Difference]: Without dead ends: 1948 [2022-03-18 12:51:50,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107418 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=22998, Invalid=222522, Unknown=0, NotChecked=0, Total=245520 [2022-03-18 12:51:50,880 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 889 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4609 mSolverCounterSat, 1929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1929 IncrementalHoareTripleChecker+Valid, 4609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:51:50,880 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 185 Invalid, 6538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1929 Valid, 4609 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-03-18 12:51:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-03-18 12:51:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1059. [2022-03-18 12:51:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1054 states have (on average 1.3500948766603416) internal successors, (1423), 1054 states have internal predecessors, (1423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:51:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1427 transitions. [2022-03-18 12:51:51,051 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1427 transitions. Word has length 45 [2022-03-18 12:51:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:51:51,051 INFO L478 AbstractCegarLoop]: Abstraction has 1059 states and 1427 transitions. [2022-03-18 12:51:51,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:51:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1427 transitions. [2022-03-18 12:51:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 12:51:51,053 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:51:51,053 INFO L500 BasicCegarLoop]: trace histogram [20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:51:51,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 12:51:51,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 12:51:51,258 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:51:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:51:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash -191671614, now seen corresponding path program 14 times [2022-03-18 12:51:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:51:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153861280] [2022-03-18 12:51:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:51:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:51:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:51:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:51:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:51:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:51:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:51:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153861280] [2022-03-18 12:51:51,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153861280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:51:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830567454] [2022-03-18 12:51:51,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:51:51,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:51:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:51:51,633 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:51:51,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 12:51:51,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:51:51,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:51:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 12:51:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:51:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:51:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:51:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:51:52,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830567454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:51:52,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:51:52,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 48 [2022-03-18 12:51:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697530340] [2022-03-18 12:51:52,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:51:52,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 12:51:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:51:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 12:51:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 12:51:52,460 INFO L87 Difference]: Start difference. First operand 1059 states and 1427 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:52:39,229 WARN L232 SmtUtils]: Spent 31.44s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:52:41,414 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 13 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 15 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 14 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296)) (< 0 (mod (+ 16 c_main_~y~0) 4294967296)) (< 0 (mod (+ 12 c_main_~y~0) 4294967296))) is different from false [2022-03-18 12:52:43,500 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 13 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 15 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 14 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (< 0 (mod (+ 7 c_main_~y~0) 4294967296)) (< 0 (mod (+ 12 c_main_~y~0) 4294967296))) is different from false [2022-03-18 12:53:18,380 WARN L232 SmtUtils]: Spent 20.93s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 12:53:47,311 WARN L232 SmtUtils]: Spent 16.64s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)