/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/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:34:51,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:34:51,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:34:51,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:34:51,544 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 [2022-03-19 22:34:51,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:34:51,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:34:51,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:34:51,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:34:51,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:34:51,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:34:51,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:34:51,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:34:51,581 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:34:51,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:34:51,581 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:34:51,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:34:51,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:34:51,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:34:51,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:34:51,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:34:51,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:34:51,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:34:51,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:34:51,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:34:51,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:34:51,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:34:51,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:34:51,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:34:51,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:34:51,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:34:51,769 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:34:51,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2022-03-19 22:34:51,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f72879c7/51c33961c2f545dbb6125aff0d3fea96/FLAGe003edecb [2022-03-19 22:34:52,137 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:34:52,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2022-03-19 22:34:52,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f72879c7/51c33961c2f545dbb6125aff0d3fea96/FLAGe003edecb [2022-03-19 22:34:52,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f72879c7/51c33961c2f545dbb6125aff0d3fea96 [2022-03-19 22:34:52,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:34:52,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:34:52,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:34:52,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:34:52,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:34:52,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698f8ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52, skipping insertion in model container [2022-03-19 22:34:52,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:34:52,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:34:52,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-03-19 22:34:52,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:34:52,729 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:34:52,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2022-03-19 22:34:52,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:34:52,746 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:34:52,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52 WrapperNode [2022-03-19 22:34:52,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:34:52,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:34:52,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:34:52,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:34:52,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:34:52,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:34:52,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:34:52,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:34:52,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (1/1) ... [2022-03-19 22:34:52,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:34:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:52,792 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) [2022-03-19 22:34:52,799 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 [2022-03-19 22:34:52,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:34:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:34:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:34:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:34:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:34:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:34:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:34:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:34:52,865 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:34:52,866 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:34:52,954 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:34:52,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:34:52,958 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 22:34:52,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:52 BoogieIcfgContainer [2022-03-19 22:34:52,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:34:52,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:34:52,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:34:52,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:34:52,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:34:52" (1/3) ... [2022-03-19 22:34:52,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a36808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:52, skipping insertion in model container [2022-03-19 22:34:52,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:52" (2/3) ... [2022-03-19 22:34:52,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a36808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:52, skipping insertion in model container [2022-03-19 22:34:52,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:52" (3/3) ... [2022-03-19 22:34:52,964 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2022-03-19 22:34:52,968 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:34:52,968 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:34:52,996 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:34:53,000 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 [2022-03-19 22:34:53,000 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:34:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-03-19 22:34:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 22:34:53,017 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:53,017 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:53,017 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2022-03-19 22:34:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:53,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993198359] [2022-03-19 22:34:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:53,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993198359] [2022-03-19 22:34:53,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993198359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:34:53,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:34:53,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:34:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624636336] [2022-03-19 22:34:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:34:53,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:34:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:34:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:34:53,186 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:53,240 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-19 22:34:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:34:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 22:34:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:53,252 INFO L225 Difference]: With dead ends: 34 [2022-03-19 22:34:53,252 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 22:34:53,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:34:53,258 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:53,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:34:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 22:34:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-19 22:34:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-03-19 22:34:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-19 22:34:53,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-19 22:34:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:53,283 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-19 22:34:53,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-19 22:34:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 22:34:53,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:53,284 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:53,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:34:53,284 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2022-03-19 22:34:53,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542426331] [2022-03-19 22:34:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542426331] [2022-03-19 22:34:53,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542426331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721255277] [2022-03-19 22:34:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:53,356 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) [2022-03-19 22:34:53,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:34:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 22:34:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:53,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721255277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:53,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:53,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 22:34:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038103748] [2022-03-19 22:34:53,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:53,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 22:34:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:53,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 22:34:53,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 22:34:53,534 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-03-19 22:34:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:53,608 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-03-19 22:34:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 22:34:53,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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 13 [2022-03-19 22:34:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:53,609 INFO L225 Difference]: With dead ends: 25 [2022-03-19 22:34:53,609 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 22:34:53,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:34:53,610 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:53,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:34:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 22:34:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 22:34:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-03-19 22:34:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-19 22:34:53,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2022-03-19 22:34:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:53,615 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-19 22:34:53,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 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) [2022-03-19 22:34:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-19 22:34:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 22:34:53,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:53,616 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:53,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 22:34:53,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:53,830 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1161520328, now seen corresponding path program 2 times [2022-03-19 22:34:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973261393] [2022-03-19 22:34:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:53,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973261393] [2022-03-19 22:34:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973261393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008560817] [2022-03-19 22:34:53,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:34:53,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:53,924 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) [2022-03-19 22:34:53,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:34:53,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:34:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 22:34:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008560817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:54,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:54,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 22:34:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946607] [2022-03-19 22:34:54,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:54,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:34:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:34:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:34:54,170 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-03-19 22:34:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:54,288 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-19 22:34:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:34:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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 19 [2022-03-19 22:34:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:54,289 INFO L225 Difference]: With dead ends: 37 [2022-03-19 22:34:54,289 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 22:34:54,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-03-19 22:34:54,290 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:54,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:34:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 22:34:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 22:34:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 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) [2022-03-19 22:34:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-19 22:34:54,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2022-03-19 22:34:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:54,294 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-19 22:34:54,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-03-19 22:34:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-19 22:34:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:34:54,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:54,295 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:54,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:54,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 22:34:54,504 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1393651588, now seen corresponding path program 3 times [2022-03-19 22:34:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44028550] [2022-03-19 22:34:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44028550] [2022-03-19 22:34:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44028550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490938704] [2022-03-19 22:34:54,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:34:54,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:54,619 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) [2022-03-19 22:34:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:34:54,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-19 22:34:54,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:54,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:34:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490938704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:54,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:54,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 22:34:54,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281612297] [2022-03-19 22:34:54,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:54,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 22:34:54,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:54,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 22:34:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 22:34:54,941 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2022-03-19 22:34:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:55,252 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-03-19 22:34:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 22:34:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 31 [2022-03-19 22:34:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:55,254 INFO L225 Difference]: With dead ends: 61 [2022-03-19 22:34:55,254 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 22:34:55,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 22:34:55,255 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:55,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 48 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:34:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 22:34:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 22:34:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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) [2022-03-19 22:34:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-19 22:34:55,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2022-03-19 22:34:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:55,262 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-19 22:34:55,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2022-03-19 22:34:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-19 22:34:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 22:34:55,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:55,263 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:55,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:55,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:55,464 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash 603069924, now seen corresponding path program 4 times [2022-03-19 22:34:55,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:55,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131353361] [2022-03-19 22:34:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:55,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131353361] [2022-03-19 22:34:55,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131353361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:55,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491732857] [2022-03-19 22:34:55,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:34:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:55,740 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) [2022-03-19 22:34:55,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:34:55,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:34:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 22:34:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491732857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:56,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:56,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 22:34:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982486382] [2022-03-19 22:34:56,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:56,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 22:34:56,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 22:34:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 22:34:56,489 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-03-19 22:34:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:57,414 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-03-19 22:34:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 22:34:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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 55 [2022-03-19 22:34:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:57,416 INFO L225 Difference]: With dead ends: 109 [2022-03-19 22:34:57,416 INFO L226 Difference]: Without dead ends: 104 [2022-03-19 22:34:57,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 22:34:57,418 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:57,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 23 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:34:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-19 22:34:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-19 22:34:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 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) [2022-03-19 22:34:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-19 22:34:57,425 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2022-03-19 22:34:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:57,426 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-19 22:34:57,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 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) [2022-03-19 22:34:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-19 22:34:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 22:34:57,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:57,428 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:57,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 22:34:57,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:57,644 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1363537740, now seen corresponding path program 5 times [2022-03-19 22:34:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892791693] [2022-03-19 22:34:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892791693] [2022-03-19 22:34:58,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892791693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827624754] [2022-03-19 22:34:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:34:58,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:58,481 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) [2022-03-19 22:34:58,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:34:58,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-19 22:34:58,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:58,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 22:34:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:58,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:00,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827624754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:00,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:00,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-19 22:35:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158669817] [2022-03-19 22:35:00,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:00,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 22:35:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 22:35:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 22:35:00,911 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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) [2022-03-19 22:35:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:03,834 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2022-03-19 22:35:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-19 22:35:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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 103 [2022-03-19 22:35:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:03,835 INFO L225 Difference]: With dead ends: 205 [2022-03-19 22:35:03,836 INFO L226 Difference]: Without dead ends: 200 [2022-03-19 22:35:03,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-03-19 22:35:03,842 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 241 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:03,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 33 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:35:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-19 22:35:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-19 22:35:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 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) [2022-03-19 22:35:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-03-19 22:35:03,855 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 103 [2022-03-19 22:35:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:03,855 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-03-19 22:35:03,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 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) [2022-03-19 22:35:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-03-19 22:35:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 22:35:03,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:03,860 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:03,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:04,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:04,071 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1918020012, now seen corresponding path program 6 times [2022-03-19 22:35:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:04,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788610421] [2022-03-19 22:35:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:06,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788610421] [2022-03-19 22:35:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788610421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518039525] [2022-03-19 22:35:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:35:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:06,766 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) [2022-03-19 22:35:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:35:06,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-19 22:35:06,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 22:35:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:07,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:15,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518039525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:15,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:15,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-19 22:35:15,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486850474] [2022-03-19 22:35:15,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:15,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-03-19 22:35:15,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-03-19 22:35:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 22:35:15,011 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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) [2022-03-19 22:35:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:25,963 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2022-03-19 22:35:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-19 22:35:25,964 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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 199 [2022-03-19 22:35:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:25,966 INFO L225 Difference]: With dead ends: 397 [2022-03-19 22:35:25,967 INFO L226 Difference]: Without dead ends: 392 [2022-03-19 22:35:25,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22984 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=55201, Invalid=91871, Unknown=0, NotChecked=0, Total=147072 [2022-03-19 22:35:25,975 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 481 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:25,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 33 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 22:35:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-03-19 22:35:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-03-19 22:35:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0025839793281655) internal successors, (388), 387 states have internal predecessors, (388), 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) [2022-03-19 22:35:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 392 transitions. [2022-03-19 22:35:25,992 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 392 transitions. Word has length 199 [2022-03-19 22:35:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:25,992 INFO L478 AbstractCegarLoop]: Abstraction has 392 states and 392 transitions. [2022-03-19 22:35:25,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 2.0051546391752577) internal successors, (389), 193 states have internal predecessors, (389), 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) [2022-03-19 22:35:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 392 transitions. [2022-03-19 22:35:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-03-19 22:35:25,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:25,997 INFO L499 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:26,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:26,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:26,213 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1679909268, now seen corresponding path program 7 times [2022-03-19 22:35:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341414616] [2022-03-19 22:35:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341414616] [2022-03-19 22:35:36,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341414616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785409155] [2022-03-19 22:35:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:35:36,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:36,314 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) [2022-03-19 22:35:36,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:35:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 192 conjunts are in the unsatisfiable core [2022-03-19 22:35:36,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:36:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:36:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785409155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:36:07,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:36:07,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 193, 193] total 386 [2022-03-19 22:36:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797213247] [2022-03-19 22:36:07,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:36:07,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-03-19 22:36:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:36:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-03-19 22:36:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73922, Invalid=74688, Unknown=0, NotChecked=0, Total=148610 [2022-03-19 22:36:07,395 INFO L87 Difference]: Start difference. First operand 392 states and 392 transitions. Second operand has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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) [2022-03-19 22:36:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:36:51,438 INFO L93 Difference]: Finished difference Result 781 states and 972 transitions. [2022-03-19 22:36:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-03-19 22:36:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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 391 [2022-03-19 22:36:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:36:51,441 INFO L225 Difference]: With dead ends: 781 [2022-03-19 22:36:51,441 INFO L226 Difference]: Without dead ends: 776 [2022-03-19 22:36:51,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92056 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=220993, Invalid=368063, Unknown=0, NotChecked=0, Total=589056 [2022-03-19 22:36:51,469 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 961 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:36:51,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 48 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:36:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-19 22:36:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-03-19 22:36:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.0012970168612192) internal successors, (772), 771 states have internal predecessors, (772), 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) [2022-03-19 22:36:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 776 transitions. [2022-03-19 22:36:51,500 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 776 transitions. Word has length 391 [2022-03-19 22:36:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:36:51,500 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 776 transitions. [2022-03-19 22:36:51,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 2.0025906735751295) internal successors, (773), 385 states have internal predecessors, (773), 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) [2022-03-19 22:36:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 776 transitions. [2022-03-19 22:36:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-03-19 22:36:51,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:36:51,517 INFO L499 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:36:51,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 22:36:51,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:36:51,726 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:36:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:36:51,727 INFO L85 PathProgramCache]: Analyzing trace with hash 188708884, now seen corresponding path program 8 times [2022-03-19 22:36:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:36:51,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060017511] [2022-03-19 22:36:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:36:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:36:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:31,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:37:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:37:31,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:37:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060017511] [2022-03-19 22:37:31,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060017511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:37:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542040614] [2022-03-19 22:37:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:37:31,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:37:31,785 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) [2022-03-19 22:37:31,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:37:31,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:37:31,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:37:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 384 conjunts are in the unsatisfiable core [2022-03-19 22:37:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:37:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:37:33,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:39:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:39:34,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542040614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:39:34,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:39:34,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [386, 385, 385] total 770 [2022-03-19 22:39:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721224772] [2022-03-19 22:39:34,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:39:34,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 770 states [2022-03-19 22:39:34,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:39:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 770 interpolants. [2022-03-19 22:39:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295298, Invalid=296832, Unknown=0, NotChecked=0, Total=592130 [2022-03-19 22:39:34,583 INFO L87 Difference]: Start difference. First operand 776 states and 776 transitions. Second operand has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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) [2022-03-19 22:42:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:42:40,855 INFO L93 Difference]: Finished difference Result 1549 states and 1932 transitions. [2022-03-19 22:42:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2022-03-19 22:42:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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 775 [2022-03-19 22:42:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:42:40,862 INFO L225 Difference]: With dead ends: 1549 [2022-03-19 22:42:40,862 INFO L226 Difference]: Without dead ends: 1544 [2022-03-19 22:42:41,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2702 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 1534 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368440 ImplicationChecksByTransitivity, 327.0s TimeCoverageRelationStatistics Valid=884353, Invalid=1473407, Unknown=0, NotChecked=0, Total=2357760 [2022-03-19 22:42:41,103 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 1921 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:42:41,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 48 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 22:42:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-03-19 22:42:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1544. [2022-03-19 22:42:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1539 states have (on average 1.000649772579597) internal successors, (1540), 1539 states have internal predecessors, (1540), 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) [2022-03-19 22:42:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1544 transitions. [2022-03-19 22:42:41,131 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1544 transitions. Word has length 775 [2022-03-19 22:42:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:42:41,132 INFO L478 AbstractCegarLoop]: Abstraction has 1544 states and 1544 transitions. [2022-03-19 22:42:41,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 770 states, 770 states have (on average 2.001298701298701) internal successors, (1541), 769 states have internal predecessors, (1541), 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) [2022-03-19 22:42:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1544 transitions. [2022-03-19 22:42:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1544 [2022-03-19 22:42:41,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:42:41,159 INFO L499 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:42:41,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 22:42:41,360 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,SelfDestructingSolverStorable8 [2022-03-19 22:42:41,360 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:42:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:42:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash 39036180, now seen corresponding path program 9 times [2022-03-19 22:42:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:42:41,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038517961] [2022-03-19 22:42:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:42:41,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:42:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:45:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:45:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:45:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:45:26,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:45:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038517961] [2022-03-19 22:45:26,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038517961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:45:26,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825207335] [2022-03-19 22:45:26,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:45:26,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:45:26,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:45:26,739 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) [2022-03-19 22:45:26,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:45:31,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 767 check-sat command(s) [2022-03-19 22:45:31,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:45:31,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 768 conjunts are in the unsatisfiable core [2022-03-19 22:45:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:45:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 586756 backedges. 0 proven. 586756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:45:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates...