/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 04:30:08,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 04:30:08,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 04:30:08,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 04:30:08,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 04:30:08,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 04:30:08,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 04:30:08,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 04:30:08,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 04:30:08,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 04:30:08,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 04:30:08,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 04:30:08,659 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 04:30:08,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 04:30:08,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 04:30:08,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 04:30:08,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 04:30:08,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 04:30:08,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 04:30:08,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 04:30:08,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 04:30:08,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 04:30:08,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 04:30:08,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 04:30:08,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 04:30:08,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 04:30:08,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 04:30:08,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 04:30:08,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 04:30:08,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 04:30:08,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 04:30:08,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 04:30:08,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 04:30:08,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 04:30:08,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 04:30:08,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:30:08,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 04:30:08,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 04:30:08,695 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 04:30:08,695 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 04:30:08,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 04:30:08,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 04:30:08,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 04:30:08,947 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 04:30:08,949 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 04:30:08,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-06 04:30:09,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d8d62b7/100ebdc098ea46d8b6ecbcc2161c8df4/FLAG1794cbe75 [2022-04-06 04:30:09,370 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 04:30:09,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-06 04:30:09,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d8d62b7/100ebdc098ea46d8b6ecbcc2161c8df4/FLAG1794cbe75 [2022-04-06 04:30:09,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9d8d62b7/100ebdc098ea46d8b6ecbcc2161c8df4 [2022-04-06 04:30:09,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 04:30:09,389 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 04:30:09,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 04:30:09,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 04:30:09,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 04:30:09,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc7b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 04:30:09,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 04:30:09,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-06 04:30:09,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:30:09,597 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 04:30:09,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-06 04:30:09,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:30:09,643 INFO L208 MainTranslator]: Completed translation [2022-04-06 04:30:09,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09 WrapperNode [2022-04-06 04:30:09,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 04:30:09,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 04:30:09,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 04:30:09,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 04:30:09,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 04:30:09,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 04:30:09,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 04:30:09,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 04:30:09,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:30:09,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:09,716 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) [2022-04-06 04:30:09,718 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 [2022-04-06 04:30:09,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 04:30:09,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 04:30:09,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 04:30:09,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 04:30:09,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 04:30:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 04:30:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 04:30:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 04:30:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 04:30:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 04:30:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 04:30:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 04:30:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 04:30:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 04:30:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 04:30:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 04:30:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 04:30:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 04:30:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 04:30:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 04:30:09,806 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 04:30:09,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 04:30:09,931 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 04:30:09,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 04:30:09,937 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 04:30:09,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09 BoogieIcfgContainer [2022-04-06 04:30:09,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 04:30:09,939 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 04:30:09,939 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 04:30:09,940 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 04:30:09,943 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,945 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 04:30:09,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:30:09 BasicIcfg [2022-04-06 04:30:09,961 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 04:30:09,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 04:30:09,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 04:30:09,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 04:30:09,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:30:09" (1/4) ... [2022-04-06 04:30:09,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684919d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (2/4) ... [2022-04-06 04:30:09,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684919d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09" (3/4) ... [2022-04-06 04:30:09,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684919d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:30:09" (4/4) ... [2022-04-06 04:30:09,968 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.cJordan [2022-04-06 04:30:09,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 04:30:09,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 04:30:10,018 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 04:30:10,029 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 04:30:10,029 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 04:30:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-04-06 04:30:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 04:30:10,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,079 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,079 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -189909079, now seen corresponding path program 1 times [2022-04-06 04:30:10,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238085879] [2022-04-06 04:30:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:10,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:10,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238085879] [2022-04-06 04:30:10,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238085879] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:10,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:10,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 04:30:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541441844] [2022-04-06 04:30:10,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:10,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 04:30:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 04:30:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 04:30:10,372 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-04-06 04:30:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:10,416 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 04:30:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 04:30:10,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 15 [2022-04-06 04:30:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:10,434 INFO L225 Difference]: With dead ends: 31 [2022-04-06 04:30:10,434 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 04:30:10,436 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 [2022-04-06 04:30:10,439 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-04-06 04:30:10,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 04:30:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 04:30:10,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 04:30:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-04-06 04:30:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-06 04:30:10,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-04-06 04:30:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:10,474 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-06 04:30:10,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-04-06 04:30:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-06 04:30:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 04:30:10,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,476 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 04:30:10,477 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1109859861, now seen corresponding path program 1 times [2022-04-06 04:30:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733655215] [2022-04-06 04:30:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:10,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:10,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733655215] [2022-04-06 04:30:10,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733655215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:10,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:30:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215234391] [2022-04-06 04:30:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:10,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:30:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:30:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:30:10,641 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-06 04:30:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:10,809 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 04:30:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 04:30:10,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-04-06 04:30:10,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:10,810 INFO L225 Difference]: With dead ends: 32 [2022-04-06 04:30:10,811 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 04:30:10,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:30:10,812 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:10,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:30:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 04:30:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 04:30:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-04-06 04:30:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 04:30:10,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-04-06 04:30:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:10,817 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 04:30:10,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-06 04:30:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 04:30:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 04:30:10,818 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,818 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 04:30:10,819 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1012960919, now seen corresponding path program 1 times [2022-04-06 04:30:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66754051] [2022-04-06 04:30:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:11,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66754051] [2022-04-06 04:30:11,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66754051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:30:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097944925] [2022-04-06 04:30:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:11,014 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) [2022-04-06 04:30:11,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 04:30:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 04:30:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:30:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:30:11,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 04:30:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097944925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:11,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 04:30:11,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 04:30:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627369418] [2022-04-06 04:30:11,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:11,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 04:30:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 04:30:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 04:30:11,251 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:30:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:11,315 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-06 04:30:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 04:30:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 04:30:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:11,319 INFO L225 Difference]: With dead ends: 35 [2022-04-06 04:30:11,319 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 04:30:11,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-06 04:30:11,323 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:11,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 04:30:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 04:30:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-04-06 04:30:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-04-06 04:30:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 04:30:11,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-04-06 04:30:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:11,340 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 04:30:11,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:30:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 04:30:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 04:30:11,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:11,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:11,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 04:30:11,547 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 [2022-04-06 04:30:11,548 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash -768849603, now seen corresponding path program 1 times [2022-04-06 04:30:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:11,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289788150] [2022-04-06 04:30:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:30:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:11,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289788150] [2022-04-06 04:30:11,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289788150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:11,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:11,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 04:30:11,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446450796] [2022-04-06 04:30:11,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:11,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 04:30:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 04:30:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 04:30:11,662 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-06 04:30:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:11,786 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-06 04:30:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 04:30:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 23 [2022-04-06 04:30:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:11,787 INFO L225 Difference]: With dead ends: 38 [2022-04-06 04:30:11,787 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 04:30:11,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-06 04:30:11,795 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:11,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:30:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 04:30:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-04-06 04:30:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2022-04-06 04:30:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 04:30:11,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-04-06 04:30:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:11,803 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 04:30:11,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-06 04:30:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 04:30:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 04:30:11,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:11,804 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:11,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 04:30:11,805 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1028101756, now seen corresponding path program 1 times [2022-04-06 04:30:11,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:11,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371209463] [2022-04-06 04:30:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371209463] [2022-04-06 04:30:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371209463] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:30:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171087689] [2022-04-06 04:30:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:11,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:11,989 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) [2022-04-06 04:30:11,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 04:30:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 04:30:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:30:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:12,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:30:14,639 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_main_~SIZE~0_29_56 Int) (aux_mod_aux_mod_main_~SIZE~0_29_56 Int)) (or (<= 0 aux_div_aux_mod_main_~SIZE~0_29_56) (<= (+ 4294967295 (* aux_div_aux_mod_main_~SIZE~0_29_56 4294967296) aux_mod_aux_mod_main_~SIZE~0_29_56) 0) (<= 4294967296 aux_mod_aux_mod_main_~SIZE~0_29_56) (< (mod c_main_~j~0 4294967296) (mod (+ (* 4294967295 aux_mod_aux_mod_main_~SIZE~0_29_56) 1) 4294967296)))) is different from false [2022-04-06 04:30:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-04-06 04:30:16,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171087689] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:30:16,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:30:16,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-04-06 04:30:16,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658012007] [2022-04-06 04:30:16,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:30:16,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 04:30:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 04:30:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2022-04-06 04:30:16,150 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:30:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:16,471 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-04-06 04:30:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 04:30:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 04:30:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:16,472 INFO L225 Difference]: With dead ends: 40 [2022-04-06 04:30:16,472 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 04:30:16,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2022-04-06 04:30:16,473 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:16,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 126 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-04-06 04:30:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 04:30:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-04-06 04:30:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2022-04-06 04:30:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-06 04:30:16,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-04-06 04:30:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:16,477 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-06 04:30:16,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:30:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-06 04:30:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 04:30:16,478 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:16,478 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:16,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 04:30:16,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:16,684 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1354614778, now seen corresponding path program 2 times [2022-04-06 04:30:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:16,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057557185] [2022-04-06 04:30:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057557185] [2022-04-06 04:30:17,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057557185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:30:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633984384] [2022-04-06 04:30:17,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 04:30:17,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:17,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:17,151 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) [2022-04-06 04:30:17,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 04:30:17,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 04:30:17,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:30:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 04:30:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:30:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:30:17,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 04:30:17,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:30:17,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 04:30:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:30:17,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:30:17,715 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 41 treesize of output 35 [2022-04-06 04:30:17,735 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-06 04:30:17,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-04-06 04:30:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:30:17,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633984384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:30:17,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:30:17,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 30 [2022-04-06 04:30:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781881890] [2022-04-06 04:30:17,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:30:17,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 04:30:17,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 04:30:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-04-06 04:30:17,851 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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) [2022-04-06 04:30:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:18,941 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2022-04-06 04:30:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 04:30:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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 25 [2022-04-06 04:30:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:18,944 INFO L225 Difference]: With dead ends: 77 [2022-04-06 04:30:18,944 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 04:30:18,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=525, Invalid=2445, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 04:30:18,948 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:18,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 91 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 606 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-04-06 04:30:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 04:30:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2022-04-06 04:30:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 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) [2022-04-06 04:30:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-04-06 04:30:18,962 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-04-06 04:30:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:18,963 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-04-06 04:30:18,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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) [2022-04-06 04:30:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-04-06 04:30:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 04:30:18,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:18,964 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, 1, 1, 1, 1] [2022-04-06 04:30:18,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 04:30:19,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:19,188 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:19,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1272155915, now seen corresponding path program 1 times [2022-04-06 04:30:19,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340412975] [2022-04-06 04:30:19,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:19,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:19,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340412975] [2022-04-06 04:30:19,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340412975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:30:19,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095021772] [2022-04-06 04:30:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:19,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:19,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:19,648 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) [2022-04-06 04:30:19,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 04:30:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 04:30:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:30:19,853 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-06 04:30:19,853 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 39 treesize of output 30 [2022-04-06 04:30:20,060 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-06 04:30:20,060 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 48 treesize of output 31 [2022-04-06 04:30:20,257 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-04-06 04:30:20,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-04-06 04:30:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:30:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:30:20,699 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 69 treesize of output 61 [2022-04-06 04:30:20,709 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-06 04:30:20,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 717 treesize of output 657 [2022-04-06 04:30:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:30:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095021772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:30:21,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:30:21,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-04-06 04:30:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711945045] [2022-04-06 04:30:21,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:30:21,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 04:30:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 04:30:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1124, Unknown=1, NotChecked=0, Total=1260 [2022-04-06 04:30:21,758 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:09,827 WARN L232 SmtUtils]: Spent 28.17s on a formula simplification. DAG size of input: 46 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 04:31:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:31,758 INFO L93 Difference]: Finished difference Result 169 states and 223 transitions. [2022-04-06 04:31:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 04:31:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 04:31:31,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:31,760 INFO L225 Difference]: With dead ends: 169 [2022-04-06 04:31:31,761 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 04:31:31,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=920, Invalid=7082, Unknown=8, NotChecked=0, Total=8010 [2022-04-06 04:31:31,764 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 152 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 915 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:31,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 153 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1039 Invalid, 0 Unknown, 915 Unchecked, 0.6s Time] [2022-04-06 04:31:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 04:31:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 69. [2022-04-06 04:31:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.360655737704918) internal successors, (83), 62 states have internal predecessors, (83), 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) [2022-04-06 04:31:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2022-04-06 04:31:31,772 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 28 [2022-04-06 04:31:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:31,772 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2022-04-06 04:31:31,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2022-04-06 04:31:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 04:31:31,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:31,773 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:31,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 04:31:31,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:31,988 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash -551964914, now seen corresponding path program 1 times [2022-04-06 04:31:31,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:31,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115235143] [2022-04-06 04:31:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:31,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:32,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:31:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115235143] [2022-04-06 04:31:32,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115235143] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484172313] [2022-04-06 04:31:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:32,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:32,042 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) [2022-04-06 04:31:32,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 04:31:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:32,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 04:31:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:31:32,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:31:32,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484172313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:31:32,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:31:32,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 04:31:32,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157242980] [2022-04-06 04:31:32,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:31:32,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 04:31:32,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 04:31:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 04:31:32,224 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:32,472 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2022-04-06 04:31:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 04:31:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 04:31:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:32,473 INFO L225 Difference]: With dead ends: 101 [2022-04-06 04:31:32,473 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 04:31:32,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-04-06 04:31:32,474 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:32,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 53 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:31:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 04:31:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 60. [2022-04-06 04:31:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 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) [2022-04-06 04:31:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2022-04-06 04:31:32,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 31 [2022-04-06 04:31:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:32,480 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2022-04-06 04:31:32,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2022-04-06 04:31:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 04:31:32,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:32,481 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:32,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 04:31:32,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:32,693 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1244986445, now seen corresponding path program 3 times [2022-04-06 04:31:32,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:32,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431605555] [2022-04-06 04:31:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:32,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:32,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:31:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:32,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431605555] [2022-04-06 04:31:32,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431605555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:32,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443879401] [2022-04-06 04:31:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 04:31:32,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:32,803 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) [2022-04-06 04:31:32,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 04:31:32,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-06 04:31:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:31:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 04:31:32,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:31:33,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:31:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443879401] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:31:33,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:31:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-04-06 04:31:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826126882] [2022-04-06 04:31:33,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:31:33,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 04:31:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 04:31:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-04-06 04:31:33,146 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:33,396 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2022-04-06 04:31:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 04:31:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 04:31:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:33,397 INFO L225 Difference]: With dead ends: 126 [2022-04-06 04:31:33,397 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 04:31:33,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-04-06 04:31:33,398 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:33,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 75 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 04:31:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 04:31:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2022-04-06 04:31:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 78 states have internal predecessors, (103), 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) [2022-04-06 04:31:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-04-06 04:31:33,405 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 31 [2022-04-06 04:31:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:33,405 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-04-06 04:31:33,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:31:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-04-06 04:31:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 04:31:33,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:33,406 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:33,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 04:31:33,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:33,611 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1093737958, now seen corresponding path program 2 times [2022-04-06 04:31:33,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:33,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286338734] [2022-04-06 04:31:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:33,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 04:31:33,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:33,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286338734] [2022-04-06 04:31:33,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286338734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:31:33,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:31:33,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 04:31:33,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850458733] [2022-04-06 04:31:33,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:31:33,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 04:31:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 04:31:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 04:31:33,656 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-04-06 04:31:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:33,690 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-04-06 04:31:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 04:31:33,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 31 [2022-04-06 04:31:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:33,692 INFO L225 Difference]: With dead ends: 72 [2022-04-06 04:31:33,692 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 04:31:33,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 04:31:33,693 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:33,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 04:31:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 04:31:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-04-06 04:31:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 57 states have internal predecessors, (68), 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) [2022-04-06 04:31:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-04-06 04:31:33,710 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 31 [2022-04-06 04:31:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:33,711 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-04-06 04:31:33,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-04-06 04:31:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-04-06 04:31:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 04:31:33,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:33,715 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:33,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 04:31:33,715 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash 567979469, now seen corresponding path program 1 times [2022-04-06 04:31:33,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:33,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677023472] [2022-04-06 04:31:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:33,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 04:31:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:31:33,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677023472] [2022-04-06 04:31:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677023472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437281356] [2022-04-06 04:31:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:33,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:33,864 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) [2022-04-06 04:31:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 04:31:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 04:31:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:31:34,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:31:34,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437281356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:31:34,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:31:34,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 04:31:34,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231165608] [2022-04-06 04:31:34,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:31:34,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 04:31:34,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 04:31:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-04-06 04:31:34,206 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:31:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:34,490 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-04-06 04:31:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 04:31:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 04:31:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:34,492 INFO L225 Difference]: With dead ends: 88 [2022-04-06 04:31:34,492 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 04:31:34,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-04-06 04:31:34,493 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:34,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 64 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 04:31:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 04:31:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-04-06 04:31:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-04-06 04:31:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-04-06 04:31:34,496 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 33 [2022-04-06 04:31:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:34,496 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-04-06 04:31:34,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:31:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-04-06 04:31:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 04:31:34,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:34,497 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:34,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 04:31:34,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:34,707 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1701261365, now seen corresponding path program 4 times [2022-04-06 04:31:34,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:34,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962723335] [2022-04-06 04:31:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:34,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:35,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:31:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962723335] [2022-04-06 04:31:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962723335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670715112] [2022-04-06 04:31:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 04:31:35,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:35,062 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) [2022-04-06 04:31:35,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 04:31:35,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 04:31:35,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:31:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 04:31:35,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:31:35,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-04-06 04:31:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:31:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:31:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:31:35,416 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:31:35,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-04-06 04:31:35,453 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:31:35,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 04:31:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 04:31:35,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:35,851 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 57 treesize of output 51 [2022-04-06 04:31:35,872 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-04-06 04:31:35,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 707 treesize of output 673 [2022-04-06 04:31:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 04:31:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670715112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:31:37,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:31:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 36 [2022-04-06 04:31:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117937703] [2022-04-06 04:31:37,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:31:37,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 04:31:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 04:31:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 04:31:37,139 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 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) [2022-04-06 04:31:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:37,985 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2022-04-06 04:31:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 04:31:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 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 33 [2022-04-06 04:31:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:37,986 INFO L225 Difference]: With dead ends: 88 [2022-04-06 04:31:37,987 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 04:31:37,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=456, Invalid=2966, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 04:31:37,988 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:37,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 103 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 511 Invalid, 0 Unknown, 317 Unchecked, 0.3s Time] [2022-04-06 04:31:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 04:31:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2022-04-06 04:31:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 56 states have internal predecessors, (65), 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) [2022-04-06 04:31:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-04-06 04:31:37,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 33 [2022-04-06 04:31:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:37,992 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-04-06 04:31:37,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 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) [2022-04-06 04:31:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-04-06 04:31:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 04:31:37,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:37,993 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:38,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 04:31:38,203 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,SelfDestructingSolverStorable11 [2022-04-06 04:31:38,203 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash -954574653, now seen corresponding path program 1 times [2022-04-06 04:31:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851534708] [2022-04-06 04:31:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 04:31:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851534708] [2022-04-06 04:31:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851534708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698918604] [2022-04-06 04:31:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:38,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:38,496 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) [2022-04-06 04:31:38,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 04:31:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 04:31:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:31:38,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 04:31:38,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:31:38,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 04:31:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 04:31:38,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:40,979 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 41 treesize of output 35 [2022-04-06 04:31:40,996 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-06 04:31:40,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-04-06 04:31:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 04:31:41,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698918604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:31:41,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:31:41,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-04-06 04:31:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133154356] [2022-04-06 04:31:41,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:31:41,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 04:31:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:31:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 04:31:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-04-06 04:31:41,124 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-04-06 04:31:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:31:42,377 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2022-04-06 04:31:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 04:31:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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 36 [2022-04-06 04:31:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:31:42,378 INFO L225 Difference]: With dead ends: 133 [2022-04-06 04:31:42,378 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 04:31:42,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=829, Invalid=4141, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 04:31:42,380 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 226 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 04:31:42,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 98 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 854 Invalid, 0 Unknown, 157 Unchecked, 0.5s Time] [2022-04-06 04:31:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 04:31:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 71. [2022-04-06 04:31:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 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) [2022-04-06 04:31:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-04-06 04:31:42,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 36 [2022-04-06 04:31:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:31:42,385 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-04-06 04:31:42,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-04-06 04:31:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-04-06 04:31:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 04:31:42,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:31:42,386 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:31:42,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 04:31:42,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 04:31:42,608 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:31:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:31:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash -392015670, now seen corresponding path program 3 times [2022-04-06 04:31:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:31:42,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779399653] [2022-04-06 04:31:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:31:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:31:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:31:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:31:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:31:43,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:31:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779399653] [2022-04-06 04:31:43,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779399653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:31:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358795959] [2022-04-06 04:31:43,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 04:31:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:31:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:31:43,038 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) [2022-04-06 04:31:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 04:31:43,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 04:31:43,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:31:43,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 04:31:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:31:43,241 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 04:31:43,241 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 40 treesize of output 30 [2022-04-06 04:31:43,373 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-04-06 04:31:43,373 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 49 treesize of output 30 [2022-04-06 04:31:43,531 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-04-06 04:31:43,531 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 35 treesize of output 37 [2022-04-06 04:31:43,628 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-04-06 04:31:43,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-04-06 04:31:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 04:31:43,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:31:47,902 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_28 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_28 1))) (forall ((v_ArrVal_231 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* v_main_~i~0_28 4) |c_main_~#v~0.offset| 4) v_ArrVal_231))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-04-06 04:31:55,981 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 85 treesize of output 77 [2022-04-06 04:31:56,013 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-04-06 04:31:56,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85467 treesize of output 82393