/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/nla-digbench-scaling/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:32:01,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:32:01,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:32:01,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 20:32:01,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 20:32:01,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 20:32:01,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 20:32:01,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 20:32:01,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 20:32:01,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 20:32:01,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 20:32:01,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 20:32:01,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:32:01,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:32:01,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:32:01,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:32:01,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:32:01,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:32:01,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:32:01,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:32:01,567 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:32:01,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:32:01,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:32:01,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:32:01,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:32:01,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:32:01,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:32:01,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:32:01,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:32:01,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:32:01,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:32:01,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:32:01,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:32:01,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:32:01,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:32:01,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:32:01,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:32:01,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:32:01,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:32:01,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:32:01,593 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:32:01,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:32:01,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:32:01,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:32:01,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:32:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:32:01,770 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:32:01,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-03-18 20:32:01,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47160127/ce5d6732dc03435f92879d8a48ef7df5/FLAGad8c8f198 [2022-03-18 20:32:02,099 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:32:02,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-03-18 20:32:02,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47160127/ce5d6732dc03435f92879d8a48ef7df5/FLAGad8c8f198 [2022-03-18 20:32:02,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e47160127/ce5d6732dc03435f92879d8a48ef7df5 [2022-03-18 20:32:02,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:32:02,546 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:32:02,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:32:02,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:32:02,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:32:02,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef90cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02, skipping insertion in model container [2022-03-18 20:32:02,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:32:02,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:32:02,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2022-03-18 20:32:02,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:32:02,692 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:32:02,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2022-03-18 20:32:02,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:32:02,722 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:32:02,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02 WrapperNode [2022-03-18 20:32:02,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:32:02,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:32:02,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:32:02,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:32:02,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:32:02,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:32:02,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:32:02,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:32:02,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:32:02,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:02,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 20:32:02,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 20:32:02,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:32:02,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:32:02,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:32:02,809 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:32:02,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:32:02,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:32:02,809 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:32:02,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:32:02,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:32:02,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:32:02,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 20:32:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:32:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:32:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:32:02,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:32:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:32:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:32:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:32:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:32:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:32:02,854 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:32:02,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:32:02,949 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:32:02,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:32:02,954 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:32:02,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:32:02 BoogieIcfgContainer [2022-03-18 20:32:02,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:32:02,956 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:32:02,957 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:32:02,957 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:32:02,959 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:32:02" (1/1) ... [2022-03-18 20:32:02,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:32:02 BasicIcfg [2022-03-18 20:32:02,993 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:32:02,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:32:02,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:32:02,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:32:03,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:32:02" (1/4) ... [2022-03-18 20:32:03,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4743e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:32:03, skipping insertion in model container [2022-03-18 20:32:03,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:32:02" (2/4) ... [2022-03-18 20:32:03,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4743e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:32:03, skipping insertion in model container [2022-03-18 20:32:03,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:32:02" (3/4) ... [2022-03-18 20:32:03,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4743e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:32:03, skipping insertion in model container [2022-03-18 20:32:03,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:32:02" (4/4) ... [2022-03-18 20:32:03,002 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.cJordan [2022-03-18 20:32:03,006 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:32:03,007 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:32:03,047 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:32:03,057 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 [2022-03-18 20:32:03,058 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:32:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:32:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 20:32:03,083 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:03,084 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:03,085 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-03-18 20:32:03,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:03,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593843291] [2022-03-18 20:32:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:32:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 20:32:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593843291] [2022-03-18 20:32:03,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593843291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:32:03,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:32:03,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:32:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934259233] [2022-03-18 20:32:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:32:03,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:32:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:32:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:32:03,316 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 20:32:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:03,368 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-03-18 20:32:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:32:03,370 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 20:32:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:03,376 INFO L225 Difference]: With dead ends: 31 [2022-03-18 20:32:03,376 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 20:32:03,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:32:03,380 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:03,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:32:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 20:32:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-18 20:32:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 20:32:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 20:32:03,408 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-18 20:32:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:03,408 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 20:32:03,409 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 20:32:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 20:32:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 20:32:03,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:03,410 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:03,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:32:03,411 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-03-18 20:32:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770808150] [2022-03-18 20:32:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:03,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147817404] [2022-03-18 20:32:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:03,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:03,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:03,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 20:32:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 20:32:03,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:03,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:32:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770808150] [2022-03-18 20:32:03,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147817404] [2022-03-18 20:32:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147817404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:32:03,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:32:03,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 20:32:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351005414] [2022-03-18 20:32:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:32:03,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 20:32:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 20:32:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 20:32:03,609 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:32:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:03,620 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-03-18 20:32:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 20:32:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-18 20:32:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:03,623 INFO L225 Difference]: With dead ends: 27 [2022-03-18 20:32:03,624 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 20:32:03,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 20:32:03,627 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:03,630 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:32:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 20:32:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 20:32:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 20:32:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 20:32:03,633 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-18 20:32:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:03,634 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 20:32:03,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 20:32:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 20:32:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 20:32:03,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:03,635 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:03,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:03,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:03,848 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-03-18 20:32:03,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:03,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269757562] [2022-03-18 20:32:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:03,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267667916] [2022-03-18 20:32:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:03,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:03,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:03,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:03,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 20:32:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 20:32:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:03,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:32:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:03,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269757562] [2022-03-18 20:32:03,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:03,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267667916] [2022-03-18 20:32:03,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267667916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:32:03,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:32:03,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 20:32:03,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930881336] [2022-03-18 20:32:03,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:32:03,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:32:03,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:03,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:32:03,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 20:32:03,999 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 20:32:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:04,028 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-18 20:32:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:32:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 20:32:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:04,029 INFO L225 Difference]: With dead ends: 36 [2022-03-18 20:32:04,029 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 20:32:04,029 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:32:04,030 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:04,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:32:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 20:32:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-18 20:32:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:32:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-18 20:32:04,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-18 20:32:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:04,035 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-18 20:32:04,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 20:32:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-18 20:32:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 20:32:04,036 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:04,036 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:04,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:04,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 20:32:04,256 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-03-18 20:32:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:04,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283362127] [2022-03-18 20:32:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:04,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:04,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166577941] [2022-03-18 20:32:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:04,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:04,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:04,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 20:32:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:32:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:04,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:32:04,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283362127] [2022-03-18 20:32:04,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166577941] [2022-03-18 20:32:04,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166577941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:32:04,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:32:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 20:32:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419844645] [2022-03-18 20:32:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:32:04,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 20:32:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 20:32:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:32:04,396 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:32:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:04,451 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-18 20:32:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 20:32:04,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-18 20:32:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:04,453 INFO L225 Difference]: With dead ends: 35 [2022-03-18 20:32:04,453 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 20:32:04,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:32:04,454 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:04,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:32:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 20:32:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-18 20:32:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:32:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-18 20:32:04,457 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-18 20:32:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:04,457 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-18 20:32:04,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:32:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-18 20:32:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 20:32:04,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:04,458 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:04,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:04,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:04,669 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-03-18 20:32:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:04,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793352403] [2022-03-18 20:32:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:04,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:04,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452163466] [2022-03-18 20:32:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:04,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:04,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:04,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:04,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 20:32:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:32:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:04,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:32:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793352403] [2022-03-18 20:32:04,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452163466] [2022-03-18 20:32:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452163466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:32:04,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:32:04,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 20:32:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581531275] [2022-03-18 20:32:04,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:32:04,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:32:04,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:04,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:32:04,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:32:04,851 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:32:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:04,894 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-18 20:32:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 20:32:04,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-03-18 20:32:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:04,895 INFO L225 Difference]: With dead ends: 63 [2022-03-18 20:32:04,896 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 20:32:04,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 20:32:04,896 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:04,897 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 99 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:32:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 20:32:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-18 20:32:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:32:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-18 20:32:04,902 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-03-18 20:32:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:04,902 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-18 20:32:04,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:32:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-18 20:32:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 20:32:04,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:04,903 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:04,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:05,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:05,119 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-03-18 20:32:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948726121] [2022-03-18 20:32:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:05,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:05,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430777093] [2022-03-18 20:32:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:05,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:05,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:05,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 20:32:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 20:32:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:32:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948726121] [2022-03-18 20:32:12,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430777093] [2022-03-18 20:32:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430777093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:32:12,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:32:12,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-18 20:32:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032934615] [2022-03-18 20:32:12,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:32:12,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 20:32:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 20:32:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:32:12,630 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:32:15,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:32:19,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:32:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:19,771 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-03-18 20:32:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 20:32:19,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 20:32:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:19,773 INFO L225 Difference]: With dead ends: 92 [2022-03-18 20:32:19,773 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 20:32:19,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-18 20:32:19,774 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:19,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 164 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-03-18 20:32:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 20:32:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-18 20:32:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:32:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-03-18 20:32:19,785 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-03-18 20:32:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:19,785 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-03-18 20:32:19,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:32:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-03-18 20:32:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 20:32:19,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:19,786 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:19,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:19,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:19,988 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-03-18 20:32:19,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117874298] [2022-03-18 20:32:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:20,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729826716] [2022-03-18 20:32:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:20,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:20,007 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:20,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 20:32:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 20:32:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:21,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:32:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:32:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:21,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117874298] [2022-03-18 20:32:21,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:21,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729826716] [2022-03-18 20:32:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729826716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:32:21,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:32:21,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-18 20:32:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330416344] [2022-03-18 20:32:21,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:32:21,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 20:32:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 20:32:21,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-18 20:32:21,672 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 20:32:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:22,421 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-03-18 20:32:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 20:32:22,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-18 20:32:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:22,422 INFO L225 Difference]: With dead ends: 116 [2022-03-18 20:32:22,422 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 20:32:22,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-18 20:32:22,423 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:22,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 157 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 20:32:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 20:32:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-03-18 20:32:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:32:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-03-18 20:32:22,431 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-03-18 20:32:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:22,431 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-03-18 20:32:22,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 20:32:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-03-18 20:32:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 20:32:22,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:22,432 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:22,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:22,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:22,633 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-03-18 20:32:22,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732248980] [2022-03-18 20:32:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:22,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:22,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854502423] [2022-03-18 20:32:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:22,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:22,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:22,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 20:32:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 20:32:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:32:22,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:32:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:32:22,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:32:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732248980] [2022-03-18 20:32:22,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:32:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854502423] [2022-03-18 20:32:22,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854502423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:32:22,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:32:22,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 20:32:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056718286] [2022-03-18 20:32:22,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:32:22,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:32:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:32:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:32:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:32:22,857 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 20:32:24,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:32:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:32:24,902 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-03-18 20:32:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 20:32:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-18 20:32:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:32:24,903 INFO L225 Difference]: With dead ends: 98 [2022-03-18 20:32:24,903 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 20:32:24,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:32:24,904 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:32:24,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 97 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 20:32:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 20:32:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-18 20:32:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:32:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-03-18 20:32:24,909 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-03-18 20:32:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:32:24,909 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-03-18 20:32:24,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 20:32:24,909 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-03-18 20:32:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 20:32:24,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:32:24,910 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:32:24,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 20:32:25,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:25,111 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:32:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:32:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-03-18 20:32:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:32:25,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114089864] [2022-03-18 20:32:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:32:25,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:32:25,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925650023] [2022-03-18 20:32:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:32:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:32:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:32:25,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:32:25,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 20:32:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:32:25,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 20:32:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:32:27,234 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:32:45,515 WARN L232 SmtUtils]: Spent 8.84s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 20:32:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 20:32:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:32:58,964 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:33:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 20:33:06,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:33:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114089864] [2022-03-18 20:33:06,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:33:06,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925650023] [2022-03-18 20:33:06,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925650023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:33:06,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:33:06,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-18 20:33:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361489912] [2022-03-18 20:33:06,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:33:06,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 20:33:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:33:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 20:33:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=455, Unknown=3, NotChecked=0, Total=552 [2022-03-18 20:33:06,609 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:33:09,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:33:14,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:34:14,429 WARN L232 SmtUtils]: Spent 57.32s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 20:34:16,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:34:22,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:34:40,076 WARN L232 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 20:34:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:34:42,862 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2022-03-18 20:34:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 20:34:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-03-18 20:34:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:34:42,863 INFO L225 Difference]: With dead ends: 127 [2022-03-18 20:34:42,863 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 20:34:42,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=186, Invalid=931, Unknown=5, NotChecked=0, Total=1122 [2022-03-18 20:34:42,864 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:34:42,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 385 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 321 Invalid, 2 Unknown, 25 Unchecked, 13.2s Time] [2022-03-18 20:34:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 20:34:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-03-18 20:34:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 89 states have internal predecessors, (99), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 20:34:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-03-18 20:34:42,871 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 48 [2022-03-18 20:34:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:34:42,871 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-03-18 20:34:42,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:34:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-03-18 20:34:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 20:34:42,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:34:42,874 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:34:42,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 20:34:43,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 20:34:43,084 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:34:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:34:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-03-18 20:34:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:34:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535964254] [2022-03-18 20:34:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:34:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:34:43,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:34:43,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346057730] [2022-03-18 20:34:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:34:43,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:34:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:34:43,101 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:34:43,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 20:34:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:34:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:34:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 20:34:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:34:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:34:43,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:34:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 20:34:43,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:34:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535964254] [2022-03-18 20:34:43,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:34:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346057730] [2022-03-18 20:34:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346057730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:34:43,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:34:43,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 20:34:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26578996] [2022-03-18 20:34:43,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:34:43,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 20:34:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:34:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 20:34:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:34:43,619 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 20:34:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:34:43,912 INFO L93 Difference]: Finished difference Result 308 states and 340 transitions. [2022-03-18 20:34:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 20:34:43,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-03-18 20:34:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:34:43,918 INFO L225 Difference]: With dead ends: 308 [2022-03-18 20:34:43,918 INFO L226 Difference]: Without dead ends: 308 [2022-03-18 20:34:43,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-18 20:34:43,919 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:34:43,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 203 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:34:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-18 20:34:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2022-03-18 20:34:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.128755364806867) internal successors, (263), 247 states have internal predecessors, (263), 37 states have call successors, (37), 28 states have call predecessors, (37), 27 states have return successors, (35), 22 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 20:34:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2022-03-18 20:34:43,947 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 58 [2022-03-18 20:34:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:34:43,947 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2022-03-18 20:34:43,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 20:34:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2022-03-18 20:34:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 20:34:43,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:34:43,948 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:34:43,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 20:34:44,149 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,SelfDestructingSolverStorable9 [2022-03-18 20:34:44,149 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:34:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:34:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-03-18 20:34:44,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:34:44,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462516250] [2022-03-18 20:34:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:34:44,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:34:44,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:34:44,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133370653] [2022-03-18 20:34:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:34:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:34:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:34:44,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:34:44,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 20:34:44,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:34:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:34:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 20:34:44,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:34:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 20:34:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:34:50,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:34:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462516250] [2022-03-18 20:34:50,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:34:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133370653] [2022-03-18 20:34:50,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133370653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:34:50,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:34:50,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 20:34:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903980950] [2022-03-18 20:34:50,891 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:34:50,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 20:34:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:34:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 20:34:50,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-18 20:34:50,892 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:34:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:34:51,968 INFO L93 Difference]: Finished difference Result 425 states and 499 transitions. [2022-03-18 20:34:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 20:34:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-03-18 20:34:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:34:51,970 INFO L225 Difference]: With dead ends: 425 [2022-03-18 20:34:51,970 INFO L226 Difference]: Without dead ends: 425 [2022-03-18 20:34:51,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 20:34:51,970 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 20:34:51,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 361 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 373 Invalid, 0 Unknown, 59 Unchecked, 0.7s Time] [2022-03-18 20:34:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-18 20:34:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 318. [2022-03-18 20:34:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 249 states have (on average 1.1285140562248996) internal successors, (281), 264 states have internal predecessors, (281), 40 states have call successors, (40), 29 states have call predecessors, (40), 28 states have return successors, (38), 24 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 20:34:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 359 transitions. [2022-03-18 20:34:51,982 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 359 transitions. Word has length 58 [2022-03-18 20:34:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:34:51,982 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 359 transitions. [2022-03-18 20:34:51,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:34:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 359 transitions. [2022-03-18 20:34:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 20:34:51,983 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:34:51,983 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:34:52,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 20:34:52,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 20:34:52,196 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:34:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:34:52,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-03-18 20:34:52,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:34:52,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206408042] [2022-03-18 20:34:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:34:52,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:34:52,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:34:52,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674521491] [2022-03-18 20:34:52,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:34:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:34:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:34:52,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:34:52,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 20:34:52,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:34:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:34:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 20:34:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:34:56,344 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:34:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-18 20:34:59,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:35:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 20:35:03,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:35:03,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206408042] [2022-03-18 20:35:03,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:35:03,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674521491] [2022-03-18 20:35:03,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674521491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:35:03,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:35:03,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 20:35:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559050172] [2022-03-18 20:35:03,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:35:03,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 20:35:03,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:35:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 20:35:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=268, Unknown=3, NotChecked=0, Total=342 [2022-03-18 20:35:03,431 INFO L87 Difference]: Start difference. First operand 318 states and 359 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 20:35:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:35:04,669 INFO L93 Difference]: Finished difference Result 406 states and 455 transitions. [2022-03-18 20:35:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 20:35:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2022-03-18 20:35:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:35:04,671 INFO L225 Difference]: With dead ends: 406 [2022-03-18 20:35:04,671 INFO L226 Difference]: Without dead ends: 406 [2022-03-18 20:35:04,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=131, Invalid=466, Unknown=3, NotChecked=0, Total=600 [2022-03-18 20:35:04,671 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 20:35:04,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 289 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 0 Unknown, 1 Unchecked, 0.7s Time] [2022-03-18 20:35:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-18 20:35:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 210. [2022-03-18 20:35:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 166 states have internal predecessors, (191), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 20:35:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 235 transitions. [2022-03-18 20:35:04,678 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 235 transitions. Word has length 58 [2022-03-18 20:35:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:35:04,678 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 235 transitions. [2022-03-18 20:35:04,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 20:35:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 235 transitions. [2022-03-18 20:35:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 20:35:04,679 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:35:04,679 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:35:04,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 20:35:04,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 20:35:04,887 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:35:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:35:04,888 INFO L85 PathProgramCache]: Analyzing trace with hash 680514773, now seen corresponding path program 2 times [2022-03-18 20:35:04,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:35:04,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341274143] [2022-03-18 20:35:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:35:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:35:04,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:35:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233545568] [2022-03-18 20:35:04,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:35:04,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:35:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:35:04,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:35:04,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 20:35:04,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:35:04,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:35:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 20:35:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates...