/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:25:41,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:25:41,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:25:41,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:25:41,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:25:41,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:25:41,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:25:41,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:25:41,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:25:41,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:25:41,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:25:41,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:25:41,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:25:41,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:25:41,737 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:25:41,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:25:41,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:25:41,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:25:41,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:25:41,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:25:41,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:25:41,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:25:41,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:25:41,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:25:41,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:25:41,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:25:41,742 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:25:41,742 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:25:41,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:25:42,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:25:42,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:25:42,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:25:42,004 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:25:42,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 08:25:42,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33deeae40/7d9a82fd983c417796c11d31479bdbe3/FLAGa1851446e [2022-03-20 08:25:42,447 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:25:42,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-20 08:25:42,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33deeae40/7d9a82fd983c417796c11d31479bdbe3/FLAGa1851446e [2022-03-20 08:25:42,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33deeae40/7d9a82fd983c417796c11d31479bdbe3 [2022-03-20 08:25:42,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:25:42,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:25:42,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:25:42,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:25:42,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:25:42,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34cc3261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42, skipping insertion in model container [2022-03-20 08:25:42,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:25:42,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:25:42,635 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-lit/mcmillan2006.i[1009,1022] [2022-03-20 08:25:42,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:25:42,654 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:25:42,663 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-lit/mcmillan2006.i[1009,1022] [2022-03-20 08:25:42,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:25:42,676 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:25:42,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42 WrapperNode [2022-03-20 08:25:42,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:25:42,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:25:42,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:25:42,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:25:42,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:25:42,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:25:42,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:25:42,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:25:42,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:42,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:25:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:42,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:25:42,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:25:42,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:25:42,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:25:42,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:25:42,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:25:42,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:25:42,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:25:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-20 08:25:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:25:42,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:25:42,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:25:42,880 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:25:42,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:25:42,985 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:25:42,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:25:42,992 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:25:42,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:25:42 BoogieIcfgContainer [2022-03-20 08:25:42,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:25:42,994 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:25:42,994 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:25:42,999 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:25:43,002 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:25:42" (1/1) ... [2022-03-20 08:25:43,003 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:25:43,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:25:43 BasicIcfg [2022-03-20 08:25:43,017 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:25:43,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:25:43,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:25:43,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:25:43,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:25:42" (1/4) ... [2022-03-20 08:25:43,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92b10bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:25:43, skipping insertion in model container [2022-03-20 08:25:43,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:25:42" (2/4) ... [2022-03-20 08:25:43,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92b10bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:25:43, skipping insertion in model container [2022-03-20 08:25:43,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:25:42" (3/4) ... [2022-03-20 08:25:43,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92b10bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:25:43, skipping insertion in model container [2022-03-20 08:25:43,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:25:43" (4/4) ... [2022-03-20 08:25:43,024 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.iqvasr [2022-03-20 08:25:43,028 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:25:43,029 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:25:43,061 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:25:43,066 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=FINITE_AUTOMATA, 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 [2022-03-20 08:25:43,066 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:25:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-20 08:25:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:25:43,082 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:43,083 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:43,083 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:43,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1476197606, now seen corresponding path program 1 times [2022-03-20 08:25:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:43,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549233130] [2022-03-20 08:25:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:43,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549233130] [2022-03-20 08:25:43,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549233130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:25:43,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:25:43,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:25:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801431878] [2022-03-20 08:25:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:25:43,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:25:43,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:25:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:25:43,341 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-03-20 08:25:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:43,386 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-03-20 08:25:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:25:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-03-20 08:25:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:43,397 INFO L225 Difference]: With dead ends: 41 [2022-03-20 08:25:43,397 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:25:43,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:25:43,404 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:43,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:25:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:25:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 08:25:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:25:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-20 08:25:43,442 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-03-20 08:25:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:43,443 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-20 08:25:43,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-03-20 08:25:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-20 08:25:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:25:43,445 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:43,445 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:43,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:25:43,445 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1931266009, now seen corresponding path program 1 times [2022-03-20 08:25:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:43,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214910639] [2022-03-20 08:25:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214910639] [2022-03-20 08:25:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214910639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:25:43,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:25:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:25:43,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765755451] [2022-03-20 08:25:43,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:25:43,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:25:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:25:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:25:43,589 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-03-20 08:25:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:43,689 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-03-20 08:25:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:25:43,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-03-20 08:25:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:43,691 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:25:43,691 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 08:25:43,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:25:43,692 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:43,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:25:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 08:25:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 08:25:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:25:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-20 08:25:43,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-20 08:25:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:43,698 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-20 08:25:43,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-03-20 08:25:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-20 08:25:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:25:43,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:43,699 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:43,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:25:43,699 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:43,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1791050651, now seen corresponding path program 1 times [2022-03-20 08:25:43,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117768974] [2022-03-20 08:25:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:43,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:43,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117768974] [2022-03-20 08:25:43,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117768974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:43,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446272830] [2022-03-20 08:25:43,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:43,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:43,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:43,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:43,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:25:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:25:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:44,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 08:25:44,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 08:25:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:44,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:44,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-20 08:25:44,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-20 08:25:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:44,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446272830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:25:44,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:25:44,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-20 08:25:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780030233] [2022-03-20 08:25:44,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:44,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 08:25:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 08:25:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:25:44,259 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:25:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:44,438 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-20 08:25:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 08:25:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 08:25:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:44,440 INFO L225 Difference]: With dead ends: 32 [2022-03-20 08:25:44,440 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:25:44,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-20 08:25:44,442 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:44,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:25:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:25:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-20 08:25:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:25:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-20 08:25:44,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-20 08:25:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:44,449 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-20 08:25:44,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:25:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-20 08:25:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 08:25:44,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:44,450 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:44,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:25:44,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:44,666 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1619165115, now seen corresponding path program 1 times [2022-03-20 08:25:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:44,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311314383] [2022-03-20 08:25:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:44,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:44,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 08:25:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:44,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:44,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311314383] [2022-03-20 08:25:44,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311314383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:44,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634573504] [2022-03-20 08:25:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:44,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:44,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:44,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:44,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:25:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:25:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:44,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:44,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634573504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:25:44,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:25:44,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-20 08:25:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241688796] [2022-03-20 08:25:44,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:44,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:25:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:25:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:25:44,944 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:25:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:45,063 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-20 08:25:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:25:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-03-20 08:25:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:45,067 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:25:45,067 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:25:45,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:25:45,073 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:45,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 47 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:25:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:25:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 08:25:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:25:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-20 08:25:45,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-20 08:25:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:45,093 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-20 08:25:45,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:25:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-20 08:25:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 08:25:45,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:45,094 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:45,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:25:45,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:25:45,314 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -290697607, now seen corresponding path program 2 times [2022-03-20 08:25:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:45,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464182594] [2022-03-20 08:25:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:45,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 08:25:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:45,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:45,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464182594] [2022-03-20 08:25:45,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464182594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942295094] [2022-03-20 08:25:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:25:45,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:45,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:45,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:25:45,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:25:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:25:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:25:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:45,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:25:47,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:25:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:47,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:49,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:25:49,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:25:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:25:49,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942295094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:25:49,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:25:49,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 17 [2022-03-20 08:25:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023171595] [2022-03-20 08:25:49,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:49,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 08:25:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 08:25:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2022-03-20 08:25:49,898 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:25:50,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:50,168 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-20 08:25:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 08:25:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-03-20 08:25:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:50,169 INFO L225 Difference]: With dead ends: 42 [2022-03-20 08:25:50,169 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 08:25:50,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=113, Invalid=587, Unknown=2, NotChecked=0, Total=702 [2022-03-20 08:25:50,170 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:50,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-20 08:25:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 08:25:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-20 08:25:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:25:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-20 08:25:50,177 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-20 08:25:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:50,177 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-20 08:25:50,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 08:25:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-20 08:25:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 08:25:50,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:50,178 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:50,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:25:50,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:50,379 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1718174257, now seen corresponding path program 3 times [2022-03-20 08:25:50,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351424123] [2022-03-20 08:25:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:50,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:50,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-20 08:25:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 08:25:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351424123] [2022-03-20 08:25:50,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351424123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315398785] [2022-03-20 08:25:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:25:50,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:50,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:25:50,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:25:50,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:25:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:25:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:50,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:50,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315398785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:25:50,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:25:50,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-20 08:25:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362480390] [2022-03-20 08:25:50,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:50,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 08:25:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:50,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 08:25:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 08:25:50,765 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 08:25:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:50,942 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-20 08:25:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 08:25:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-03-20 08:25:50,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:50,943 INFO L225 Difference]: With dead ends: 60 [2022-03-20 08:25:50,943 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 08:25:50,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:25:50,945 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:50,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:25:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 08:25:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 08:25:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:25:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-20 08:25:50,951 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-20 08:25:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:50,951 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-20 08:25:50,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 08:25:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-20 08:25:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 08:25:50,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:50,952 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:50,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:25:51,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:51,153 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash -770459891, now seen corresponding path program 4 times [2022-03-20 08:25:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:51,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907605988] [2022-03-20 08:25:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:51,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 08:25:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:25:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907605988] [2022-03-20 08:25:51,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907605988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891628859] [2022-03-20 08:25:51,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:25:51,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:51,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:51,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:25:51,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:25:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:25:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 08:25:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:51,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:25:52,187 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 08:25:52,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 08:25:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:52,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:25:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891628859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:52,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:25:52,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-20 08:25:52,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618061513] [2022-03-20 08:25:52,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 08:25:52,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:25:52,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:25:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:25:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-20 08:25:52,355 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 08:25:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:25:52,641 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-03-20 08:25:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 08:25:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-03-20 08:25:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:25:52,643 INFO L225 Difference]: With dead ends: 69 [2022-03-20 08:25:52,643 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 08:25:52,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 08:25:52,644 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:25:52,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-03-20 08:25:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 08:25:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 08:25:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:25:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-20 08:25:52,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-03-20 08:25:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:25:52,651 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-20 08:25:52,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 08:25:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-20 08:25:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 08:25:52,652 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:25:52,652 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:25:52,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:25:52,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:52,868 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:25:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:25:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -550020917, now seen corresponding path program 5 times [2022-03-20 08:25:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:25:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084676684] [2022-03-20 08:25:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:25:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:25:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:25:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:53,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:25:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:53,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:25:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:25:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:25:53,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:25:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084676684] [2022-03-20 08:25:53,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084676684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:25:53,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781061442] [2022-03-20 08:25:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:25:53,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:25:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:25:53,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:25:53,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:25:53,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-20 08:25:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:25:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 08:25:53,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:25:53,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:25:53,250 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 08:25:53,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 08:26:01,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:26:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:26:01,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:26:01,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:26:01,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:26:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:26:01,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781061442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:26:01,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:26:01,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 23 [2022-03-20 08:26:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128953905] [2022-03-20 08:26:01,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:26:01,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 08:26:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:26:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 08:26:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=436, Unknown=3, NotChecked=0, Total=506 [2022-03-20 08:26:01,973 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 08:26:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:26:03,031 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-03-20 08:26:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 08:26:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-03-20 08:26:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:26:03,032 INFO L225 Difference]: With dead ends: 75 [2022-03-20 08:26:03,033 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 08:26:03,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=166, Invalid=1163, Unknown=3, NotChecked=0, Total=1332 [2022-03-20 08:26:03,034 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:26:03,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-20 08:26:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 08:26:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2022-03-20 08:26:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 08:26:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-20 08:26:03,042 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2022-03-20 08:26:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:26:03,042 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-20 08:26:03,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 08:26:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-20 08:26:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 08:26:03,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:26:03,044 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:26:03,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:26:03,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:26:03,251 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:26:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:26:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash 838435593, now seen corresponding path program 6 times [2022-03-20 08:26:03,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:26:03,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504548985] [2022-03-20 08:26:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:26:03,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:26:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:26:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:03,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 08:26:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:03,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 08:26:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:26:03,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:26:03,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504548985] [2022-03-20 08:26:03,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504548985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:26:03,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263503032] [2022-03-20 08:26:03,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:26:03,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:26:03,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:26:03,428 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) [2022-03-20 08:26:03,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:26:03,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 08:26:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:26:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:26:03,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:26:03,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:26:03,573 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 08:26:03,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 08:26:03,617 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 08:26:03,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-03-20 08:26:11,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:26:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:26:11,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:26:14,336 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) is different from false [2022-03-20 08:26:14,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:26:14,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:26:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-03-20 08:26:14,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263503032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:26:14,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:26:14,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 29 [2022-03-20 08:26:14,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194144968] [2022-03-20 08:26:14,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:26:14,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 08:26:14,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:26:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 08:26:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=4, NotChecked=52, Total=812 [2022-03-20 08:26:14,434 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 08:26:16,587 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 08:26:18,590 WARN L833 $PredicateComparison]: unable to prove that (and (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0)) is different from false [2022-03-20 08:26:20,607 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 8))) (and (not (= (+ (* c_main_~i~0 4) c_main_~x~0.offset) .cse0)) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0))) is different from false [2022-03-20 08:26:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:26:21,193 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-20 08:26:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 08:26:21,194 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-20 08:26:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:26:21,195 INFO L225 Difference]: With dead ends: 80 [2022-03-20 08:26:21,195 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 08:26:21,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=286, Invalid=1884, Unknown=8, NotChecked=372, Total=2550 [2022-03-20 08:26:21,196 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:26:21,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 143 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 458 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-20 08:26:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 08:26:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-03-20 08:26:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:26:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-20 08:26:21,206 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 40 [2022-03-20 08:26:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:26:21,206 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-20 08:26:21,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 08:26:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-20 08:26:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 08:26:21,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:26:21,208 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:26:21,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:26:21,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:26:21,408 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:26:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:26:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -110930399, now seen corresponding path program 7 times [2022-03-20 08:26:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:26:21,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496924025] [2022-03-20 08:26:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:26:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:26:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:26:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:26:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:26:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 08:26:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:26:21,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:26:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496924025] [2022-03-20 08:26:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496924025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:26:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854481373] [2022-03-20 08:26:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:26:21,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:26:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:26:21,616 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) [2022-03-20 08:26:21,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:26:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 08:26:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:26:21,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:26:34,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:26:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:26:34,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:26:36,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:26:36,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:26:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:26:36,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854481373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:26:36,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:26:36,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 23 [2022-03-20 08:26:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328433578] [2022-03-20 08:26:36,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:26:36,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 08:26:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:26:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 08:26:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=441, Unknown=4, NotChecked=0, Total=506 [2022-03-20 08:26:36,977 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 08:26:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:26:45,397 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-20 08:26:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 08:26:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-03-20 08:26:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:26:45,399 INFO L225 Difference]: With dead ends: 86 [2022-03-20 08:26:45,399 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 08:26:45,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=176, Invalid=1376, Unknown=8, NotChecked=0, Total=1560 [2022-03-20 08:26:45,400 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:26:45,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 126 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-20 08:26:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 08:26:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2022-03-20 08:26:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 08:26:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-20 08:26:45,408 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-03-20 08:26:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:26:45,409 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-20 08:26:45,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 08:26:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-20 08:26:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 08:26:45,410 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:26:45,410 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:26:45,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:26:45,623 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,SelfDestructingSolverStorable9 [2022-03-20 08:26:45,624 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:26:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:26:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1930534305, now seen corresponding path program 8 times [2022-03-20 08:26:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:26:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090082609] [2022-03-20 08:26:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:26:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:26:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:26:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 08:26:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:45,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 08:26:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:45,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 08:26:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:26:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:26:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:26:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090082609] [2022-03-20 08:26:45,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090082609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:26:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818091713] [2022-03-20 08:26:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:26:45,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:26:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:26:45,852 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) [2022-03-20 08:26:45,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:26:45,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:26:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:26:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 08:26:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:26:45,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:26:46,033 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 08:26:46,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 08:26:59,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:26:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:26:59,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:27:01,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:27:01,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:27:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:27:01,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818091713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:27:01,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:27:01,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-03-20 08:27:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906977052] [2022-03-20 08:27:01,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:27:01,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:27:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:27:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:27:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=570, Unknown=4, NotChecked=0, Total=650 [2022-03-20 08:27:01,353 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 08:27:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:27:01,788 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-20 08:27:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 08:27:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2022-03-20 08:27:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:27:01,790 INFO L225 Difference]: With dead ends: 116 [2022-03-20 08:27:01,790 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 08:27:01,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=188, Invalid=1530, Unknown=4, NotChecked=0, Total=1722 [2022-03-20 08:27:01,791 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:27:01,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 155 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 553 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-03-20 08:27:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 08:27:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-03-20 08:27:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 08:27:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-03-20 08:27:01,803 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 48 [2022-03-20 08:27:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:27:01,804 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-03-20 08:27:01,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 08:27:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-03-20 08:27:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 08:27:01,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:27:01,805 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:27:01,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:27:02,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:27:02,008 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:27:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:27:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1776768797, now seen corresponding path program 9 times [2022-03-20 08:27:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:27:02,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100549575] [2022-03-20 08:27:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:27:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:27:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:02,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:27:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:02,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 08:27:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:02,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:27:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:27:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 08:27:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:27:02,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100549575] [2022-03-20 08:27:02,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100549575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:27:02,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323685950] [2022-03-20 08:27:02,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:27:02,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:27:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:27:02,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:27:02,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:27:02,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 08:27:02,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:27:02,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 08:27:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:27:02,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:27:02,359 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 08:27:02,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 08:27:02,391 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 08:27:02,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 08:27:25,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:27:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 58 refuted. 8 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:27:25,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:27:28,534 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) is different from false [2022-03-20 08:27:29,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:27:29,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:27:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 11 not checked. [2022-03-20 08:27:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323685950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:27:29,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:27:29,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 17] total 30 [2022-03-20 08:27:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590616642] [2022-03-20 08:27:29,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:27:29,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 08:27:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:27:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 08:27:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=693, Unknown=21, NotChecked=54, Total=870 [2022-03-20 08:27:29,413 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 08:27:29,931 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 4 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 12)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-20 08:27:30,520 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 12))) (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0) (not (= (+ (* c_main_~i~0 4) c_main_~x~0.offset) .cse0)))) is different from false [2022-03-20 08:27:30,888 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 12)) 0) (exists ((main_~i~0 Int)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4))) 0))) is different from false [2022-03-20 08:27:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:27:47,870 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2022-03-20 08:27:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 08:27:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-03-20 08:27:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:27:47,871 INFO L225 Difference]: With dead ends: 113 [2022-03-20 08:27:47,871 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 08:27:47,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=244, Invalid=1896, Unknown=38, NotChecked=372, Total=2550 [2022-03-20 08:27:47,872 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 64 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:27:47,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 188 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 347 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-03-20 08:27:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 08:27:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2022-03-20 08:27:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 78 states have internal predecessors, (79), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 08:27:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-03-20 08:27:47,886 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 50 [2022-03-20 08:27:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:27:47,886 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-03-20 08:27:47,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 08:27:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-03-20 08:27:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 08:27:47,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:27:47,887 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:27:47,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 08:27:48,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:27:48,099 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:27:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:27:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 692034935, now seen corresponding path program 10 times [2022-03-20 08:27:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:27:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669698501] [2022-03-20 08:27:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:27:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:27:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:27:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 08:27:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 08:27:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 08:27:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 08:27:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:27:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:27:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669698501] [2022-03-20 08:27:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669698501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:27:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728529365] [2022-03-20 08:27:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:27:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:27:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:27:48,201 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:27:48,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:27:48,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:27:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:27:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:27:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:27:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:27:48,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:27:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:27:48,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728529365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:27:48,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:27:48,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-20 08:27:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998515386] [2022-03-20 08:27:48,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:27:48,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 08:27:48,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:27:48,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 08:27:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:27:48,553 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 08:27:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:27:48,766 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-20 08:27:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 08:27:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2022-03-20 08:27:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:27:48,767 INFO L225 Difference]: With dead ends: 116 [2022-03-20 08:27:48,767 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 08:27:48,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:27:48,770 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:27:48,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:27:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 08:27:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-20 08:27:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 08:27:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-20 08:27:48,780 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 54 [2022-03-20 08:27:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:27:48,781 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-20 08:27:48,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 08:27:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-20 08:27:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 08:27:48,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:27:48,782 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:27:48,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:27:48,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:27:48,991 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:27:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:27:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 529632181, now seen corresponding path program 11 times [2022-03-20 08:27:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:27:48,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783348104] [2022-03-20 08:27:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:27:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:27:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:27:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 08:27:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 08:27:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 08:27:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 08:27:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:27:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:27:49,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:27:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783348104] [2022-03-20 08:27:49,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783348104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:27:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994364026] [2022-03-20 08:27:49,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:27:49,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:27:49,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:27:49,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:27:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:27:49,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 08:27:49,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:27:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:27:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:27:49,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:28:21,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:28:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:28:21,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:28:23,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:28:23,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:28:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:28:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994364026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:28:23,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:28:23,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 26 [2022-03-20 08:28:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126973025] [2022-03-20 08:28:23,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:28:23,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:28:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:28:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:28:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=575, Unknown=5, NotChecked=0, Total=650 [2022-03-20 08:28:23,854 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:28:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:28:24,329 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-03-20 08:28:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 08:28:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2022-03-20 08:28:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:28:24,331 INFO L225 Difference]: With dead ends: 104 [2022-03-20 08:28:24,331 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 08:28:24,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=179, Invalid=1538, Unknown=5, NotChecked=0, Total=1722 [2022-03-20 08:28:24,332 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:28:24,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 175 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 707 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-03-20 08:28:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 08:28:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2022-03-20 08:28:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:28:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-03-20 08:28:24,339 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 56 [2022-03-20 08:28:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:28:24,340 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-03-20 08:28:24,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:28:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-03-20 08:28:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 08:28:24,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:28:24,341 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:28:24,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:28:24,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 08:28:24,544 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:28:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:28:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -920591757, now seen corresponding path program 12 times [2022-03-20 08:28:24,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:28:24,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829850064] [2022-03-20 08:28:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:28:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:28:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:28:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 08:28:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:28:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:28:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 08:28:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:28:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:28:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:28:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829850064] [2022-03-20 08:28:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829850064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:28:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810280902] [2022-03-20 08:28:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:28:24,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:28:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:28:24,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:28:24,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 08:28:24,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 08:28:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:28:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 08:28:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:28:24,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:28:24,934 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-20 08:28:24,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-20 08:28:57,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:28:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:28:57,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:28:59,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:28:59,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:28:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:28:59,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810280902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:28:59,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:28:59,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 29 [2022-03-20 08:28:59,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75140095] [2022-03-20 08:28:59,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:28:59,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 08:28:59,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:28:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 08:28:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=722, Unknown=5, NotChecked=0, Total=812 [2022-03-20 08:28:59,539 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:29:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:29:00,101 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-03-20 08:29:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 08:29:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 58 [2022-03-20 08:29:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:29:00,102 INFO L225 Difference]: With dead ends: 134 [2022-03-20 08:29:00,102 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 08:29:00,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 107 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=210, Invalid=1947, Unknown=5, NotChecked=0, Total=2162 [2022-03-20 08:29:00,104 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:29:00,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 720 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2022-03-20 08:29:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 08:29:00,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2022-03-20 08:29:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.05) internal successors, (84), 83 states have internal predecessors, (84), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 08:29:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2022-03-20 08:29:00,117 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 58 [2022-03-20 08:29:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:29:00,117 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2022-03-20 08:29:00,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:29:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2022-03-20 08:29:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 08:29:00,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:29:00,119 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:29:00,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 08:29:00,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 08:29:00,345 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:29:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:29:00,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1278575025, now seen corresponding path program 13 times [2022-03-20 08:29:00,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:29:00,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247702864] [2022-03-20 08:29:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:29:00,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:29:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:29:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:29:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 08:29:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 08:29:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 08:29:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:29:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:29:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247702864] [2022-03-20 08:29:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247702864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:29:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750005326] [2022-03-20 08:29:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:29:00,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:29:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:29:00,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:29:00,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 08:29:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 08:29:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:29:00,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:29:00,750 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 08:29:00,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 08:29:00,792 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 08:29:00,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-20 08:29:33,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-20 08:29:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:29:33,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:29:35,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:29:35,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:29:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:29:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750005326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:29:35,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:29:35,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 30 [2022-03-20 08:29:35,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260083154] [2022-03-20 08:29:35,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:29:35,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 08:29:35,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:29:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 08:29:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=773, Unknown=5, NotChecked=0, Total=870 [2022-03-20 08:29:35,461 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:29:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:29:35,988 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-03-20 08:29:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:29:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 60 [2022-03-20 08:29:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:29:35,989 INFO L225 Difference]: With dead ends: 129 [2022-03-20 08:29:35,989 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 08:29:35,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=243, Invalid=2202, Unknown=5, NotChecked=0, Total=2450 [2022-03-20 08:29:35,991 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:29:35,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 175 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 697 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-20 08:29:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 08:29:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-03-20 08:29:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 92 states have internal predecessors, (93), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 08:29:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2022-03-20 08:29:36,007 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 60 [2022-03-20 08:29:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:29:36,007 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2022-03-20 08:29:36,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 08:29:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2022-03-20 08:29:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 08:29:36,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:29:36,008 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:29:36,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 08:29:36,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:29:36,209 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:29:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:29:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash 603520779, now seen corresponding path program 14 times [2022-03-20 08:29:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:29:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229323365] [2022-03-20 08:29:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:29:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:29:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:29:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-20 08:29:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 08:29:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-20 08:29:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 08:29:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 08:29:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:36,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:29:36,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229323365] [2022-03-20 08:29:36,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229323365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:29:36,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623021592] [2022-03-20 08:29:36,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:29:36,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:29:36,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:29:36,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:29:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 08:29:36,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:29:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:29:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:29:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:29:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:36,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:29:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:36,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623021592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:29:36,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:29:36,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-20 08:29:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14789261] [2022-03-20 08:29:36,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:29:36,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 08:29:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:29:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 08:29:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-20 08:29:36,758 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 08:29:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:29:37,011 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-03-20 08:29:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 08:29:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 64 [2022-03-20 08:29:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:29:37,013 INFO L225 Difference]: With dead ends: 134 [2022-03-20 08:29:37,013 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 08:29:37,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 08:29:37,014 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:29:37,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:29:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 08:29:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-20 08:29:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 08:29:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-20 08:29:37,026 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 64 [2022-03-20 08:29:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:29:37,026 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-20 08:29:37,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 08:29:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-20 08:29:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 08:29:37,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:29:37,027 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:29:37,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 08:29:37,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 08:29:37,250 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:29:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:29:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash -694372407, now seen corresponding path program 15 times [2022-03-20 08:29:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:29:37,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922721556] [2022-03-20 08:29:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:29:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:29:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:29:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 08:29:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-20 08:29:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 08:29:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 08:29:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-20 08:29:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:29:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922721556] [2022-03-20 08:29:37,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922721556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:29:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531434377] [2022-03-20 08:29:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:29:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:29:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:29:37,500 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:29:37,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 08:29:37,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-20 08:29:37,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:29:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 08:29:37,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:29:37,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:29:39,028 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-20 08:29:39,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-20 08:29:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:39,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:29:39,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531434377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:29:39,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:29:39,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-20 08:29:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691132030] [2022-03-20 08:29:39,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 08:29:39,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 08:29:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:29:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 08:29:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 08:29:39,191 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 08:29:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:29:39,751 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2022-03-20 08:29:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 08:29:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 66 [2022-03-20 08:29:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:29:39,752 INFO L225 Difference]: With dead ends: 123 [2022-03-20 08:29:39,752 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 08:29:39,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=364, Invalid=3542, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 08:29:39,754 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:29:39,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 220 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2022-03-20 08:29:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 08:29:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 08:29:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:29:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-20 08:29:39,777 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-03-20 08:29:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:29:39,777 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-20 08:29:39,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 08:29:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-20 08:29:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 08:29:39,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:29:39,778 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:29:39,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 08:29:39,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 08:29:39,991 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:29:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:29:39,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1865758983, now seen corresponding path program 16 times [2022-03-20 08:29:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:29:39,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496219750] [2022-03-20 08:29:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:29:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:29:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:29:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 08:29:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 08:29:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 08:29:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 08:29:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 08:29:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:29:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:29:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:29:40,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496219750] [2022-03-20 08:29:40,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496219750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:29:40,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52887100] [2022-03-20 08:29:40,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:29:40,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:29:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:29:40,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:29:40,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 08:29:40,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:29:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:29:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 08:29:40,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:29:40,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:29:40,488 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 08:29:40,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-20 08:29:40,558 INFO L356 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-03-20 08:29:40,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2022-03-20 08:29:40,647 INFO L356 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2022-03-20 08:29:40,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2022-03-20 08:29:40,889 INFO L356 Elim1Store]: treesize reduction 258, result has 15.7 percent of original size [2022-03-20 08:29:40,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 71 [2022-03-20 08:31:27,589 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:31:36,325 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:31:42,807 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:32:29,402 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:32:40,228 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:32:48,808 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:33:44,090 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:33:57,115 WARN L232 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:34:07,836 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:34:12,492 INFO L356 Elim1Store]: treesize reduction 9518, result has 0.0 percent of original size [2022-03-20 08:34:12,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 0 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 465 case distinctions, treesize of input 358 treesize of output 97 [2022-03-20 08:34:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 40 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:34:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:34:13,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-20 08:34:13,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-20 08:34:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 08:34:13,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52887100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:34:13,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:34:13,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35, 17] total 65 [2022-03-20 08:34:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053746322] [2022-03-20 08:34:13,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:34:13,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 08:34:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:34:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 08:34:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3694, Unknown=85, NotChecked=0, Total=4160 [2022-03-20 08:34:13,729 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 65 states, 64 states have (on average 1.859375) internal successors, (119), 62 states have internal predecessors, (119), 17 states have call successors, (20), 9 states have call predecessors, (20), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 08:37:56,736 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:38:08,874 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:38:23,003 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:38:43,528 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:38:55,653 WARN L232 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:39:07,807 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:39:19,959 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:39:34,114 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:39:52,330 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:40:04,466 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)