/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/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:33:56,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:33:56,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:33:56,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 02:33:56,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:33:56,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:33:56,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:33:56,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:33:56,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:33:56,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:33:56,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:33:56,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:33:56,888 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:33:56,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:33:56,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:33:56,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:33:56,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:33:56,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 02:33:56,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:33:56,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:33:56,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:33:56,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:33:56,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:33:56,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:33:56,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:33:56,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:33:56,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:33:56,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:33:56,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:33:56,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:33:56,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:33:56,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:33:56,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:33:56,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:33:56,909 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:33:56,909 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:33:57,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:33:57,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:33:57,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:33:57,125 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:33:57,126 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:33:57,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-05 02:33:57,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8981b96/463b178401634bc195b15c33a528f33c/FLAG5beb839e3 [2022-04-05 02:33:57,563 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:33:57,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-05 02:33:57,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8981b96/463b178401634bc195b15c33a528f33c/FLAG5beb839e3 [2022-04-05 02:33:57,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8981b96/463b178401634bc195b15c33a528f33c [2022-04-05 02:33:57,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:33:57,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:33:57,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:33:57,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:33:57,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:33:57,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3b5c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57, skipping insertion in model container [2022-04-05 02:33:57,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:33:57,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:33:57,733 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/egcd3-ll_valuebound50.c[490,503] [2022-04-05 02:33:57,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:33:57,763 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:33:57,770 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/egcd3-ll_valuebound50.c[490,503] [2022-04-05 02:33:57,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:33:57,783 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:33:57,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57 WrapperNode [2022-04-05 02:33:57,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:33:57,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:33:57,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:33:57,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:33:57,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:33:57,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:33:57,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:33:57,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:33:57,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (1/1) ... [2022-04-05 02:33:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:33:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:57,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 02:33:57,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 02:33:57,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:33:57,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:33:57,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:33:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:33:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:33:57,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:33:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:33:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:33:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:33:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:33:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 02:33:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:33:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:33:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:33:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:33:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:33:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:33:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:33:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:33:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:33:57,917 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:33:57,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:33:58,049 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:33:58,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:33:58,060 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 02:33:58,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:58 BoogieIcfgContainer [2022-04-05 02:33:58,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:33:58,062 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:33:58,062 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:33:58,068 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:33:58,070 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:58" (1/1) ... [2022-04-05 02:33:58,072 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:33:58,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:33:58 BasicIcfg [2022-04-05 02:33:58,082 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:33:58,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:33:58,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:33:58,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:33:58,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:33:57" (1/4) ... [2022-04-05 02:33:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053a479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:33:58, skipping insertion in model container [2022-04-05 02:33:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:57" (2/4) ... [2022-04-05 02:33:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053a479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:33:58, skipping insertion in model container [2022-04-05 02:33:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:58" (3/4) ... [2022-04-05 02:33:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053a479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:33:58, skipping insertion in model container [2022-04-05 02:33:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:33:58" (4/4) ... [2022-04-05 02:33:58,096 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cJordan [2022-04-05 02:33:58,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:33:58,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:33:58,168 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:33:58,174 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:33:58,174 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:33:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 02:33:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 02:33:58,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:58,204 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:58,204 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-05 02:33:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:58,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429657764] [2022-04-05 02:33:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:33:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:33:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 02:33:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 02:33:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 02:33:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:58,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:58,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429657764] [2022-04-05 02:33:58,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429657764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:58,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:58,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:33:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917613713] [2022-04-05 02:33:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:58,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:33:58,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:33:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:33:58,461 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:58,521 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-04-05 02:33:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:33:58,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-05 02:33:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:58,531 INFO L225 Difference]: With dead ends: 40 [2022-04-05 02:33:58,531 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 02:33:58,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:33:58,535 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:58,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 02:33:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 02:33:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:33:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 02:33:58,562 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-05 02:33:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:58,562 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 02:33:58,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 02:33:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 02:33:58,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:58,563 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:58,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:33:58,564 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-05 02:33:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:58,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973265174] [2022-04-05 02:33:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:58,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954509427] [2022-04-05 02:33:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:58,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:58,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:33:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:33:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:33:58,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:58,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973265174] [2022-04-05 02:33:58,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:58,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954509427] [2022-04-05 02:33:58,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954509427] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:58,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:58,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:33:58,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404921349] [2022-04-05 02:33:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:58,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:33:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:33:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:33:58,804 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:58,883 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 02:33:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:33:58,883 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 02:33:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:58,884 INFO L225 Difference]: With dead ends: 47 [2022-04-05 02:33:58,884 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 02:33:58,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:33:58,885 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:58,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 02:33:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-05 02:33:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:33:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-05 02:33:58,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-05 02:33:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:58,895 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-05 02:33:58,895 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-05 02:33:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 02:33:58,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:58,896 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:58,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:59,112 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 [2022-04-05 02:33:59,113 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-05 02:33:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:59,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318586969] [2022-04-05 02:33:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:59,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:59,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711882487] [2022-04-05 02:33:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:59,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:59,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:59,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:33:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 02:33:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:33:59,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:59,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:59,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318586969] [2022-04-05 02:33:59,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:59,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711882487] [2022-04-05 02:33:59,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711882487] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:33:59,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:33:59,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 02:33:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782781723] [2022-04-05 02:33:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:59,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:33:59,533 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:59,564 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-04-05 02:33:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:33:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-05 02:33:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:59,566 INFO L225 Difference]: With dead ends: 51 [2022-04-05 02:33:59,566 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 02:33:59,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:33:59,567 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:59,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 02:33:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 02:33:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 02:33:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 02:33:59,572 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-05 02:33:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:59,572 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 02:33:59,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 02:33:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 02:33:59,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:59,573 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2022-04-05 02:33:59,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:59,790 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 [2022-04-05 02:33:59,790 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-05 02:33:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:59,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552000475] [2022-04-05 02:33:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:59,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144321990] [2022-04-05 02:33:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:59,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:59,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:33:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:33:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:33:59,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:34:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552000475] [2022-04-05 02:34:00,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144321990] [2022-04-05 02:34:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144321990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:00,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 02:34:00,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861504882] [2022-04-05 02:34:00,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:00,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:34:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:34:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 02:34:00,003 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:34:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:00,121 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-04-05 02:34:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:34:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 02:34:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:00,122 INFO L225 Difference]: With dead ends: 96 [2022-04-05 02:34:00,122 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 02:34:00,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:34:00,123 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:00,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:34:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 02:34:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-05 02:34:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:34:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-05 02:34:00,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-05 02:34:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:00,131 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-05 02:34:00,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:34:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-05 02:34:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:34:00,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:00,132 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2022-04-05 02:34:00,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:00,339 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 [2022-04-05 02:34:00,340 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-05 02:34:00,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:00,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135253593] [2022-04-05 02:34:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:00,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:00,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956617011] [2022-04-05 02:34:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:00,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:00,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:00,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:34:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 02:34:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:34:00,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:34:00,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135253593] [2022-04-05 02:34:00,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:00,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956617011] [2022-04-05 02:34:00,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956617011] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:34:00,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:34:00,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-05 02:34:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90427155] [2022-04-05 02:34:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:00,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 02:34:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 02:34:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:34:00,857 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 02:34:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:00,919 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-04-05 02:34:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 02:34:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-05 02:34:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:00,921 INFO L225 Difference]: With dead ends: 77 [2022-04-05 02:34:00,921 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 02:34:00,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:34:00,921 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:00,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 197 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:34:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 02:34:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-05 02:34:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:34:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-05 02:34:00,926 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-05 02:34:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:00,927 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-05 02:34:00,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 02:34:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-05 02:34:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:34:00,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:00,928 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:00,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:01,146 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 [2022-04-05 02:34:01,147 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-05 02:34:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:01,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262796474] [2022-04-05 02:34:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:01,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337700021] [2022-04-05 02:34:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:01,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:01,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:01,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:01,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:34:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:01,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 02:34:01,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:34:01,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:34:01,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262796474] [2022-04-05 02:34:01,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337700021] [2022-04-05 02:34:01,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337700021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:01,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-05 02:34:01,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611633173] [2022-04-05 02:34:01,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:01,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:34:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:34:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:34:01,651 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:34:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:02,012 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-04-05 02:34:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 02:34:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-04-05 02:34:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:02,014 INFO L225 Difference]: With dead ends: 116 [2022-04-05 02:34:02,014 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 02:34:02,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-04-05 02:34:02,015 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:02,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 265 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:34:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 02:34:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-04-05 02:34:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 02:34:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-04-05 02:34:02,022 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-04-05 02:34:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:02,023 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-04-05 02:34:02,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:34:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-04-05 02:34:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:34:02,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:02,024 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1] [2022-04-05 02:34:02,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:02,224 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 [2022-04-05 02:34:02,224 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-05 02:34:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:02,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152104995] [2022-04-05 02:34:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:02,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467688497] [2022-04-05 02:34:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:02,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:34:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:34:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:34:02,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:34:02,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152104995] [2022-04-05 02:34:02,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:02,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467688497] [2022-04-05 02:34:02,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467688497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:34:02,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:34:02,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:34:02,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635650793] [2022-04-05 02:34:02,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:02,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:34:02,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:02,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:34:02,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:34:02,347 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:34:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:02,381 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-04-05 02:34:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:34:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-05 02:34:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:02,396 INFO L225 Difference]: With dead ends: 149 [2022-04-05 02:34:02,396 INFO L226 Difference]: Without dead ends: 149 [2022-04-05 02:34:02,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:34:02,398 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:02,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:34:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-05 02:34:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-04-05 02:34:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-05 02:34:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-04-05 02:34:02,406 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-04-05 02:34:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:02,407 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-04-05 02:34:02,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:34:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-04-05 02:34:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:34:02,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:02,408 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:02,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:02,626 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 [2022-04-05 02:34:02,626 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-04-05 02:34:02,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:02,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872956350] [2022-04-05 02:34:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:02,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:02,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443052261] [2022-04-05 02:34:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:02,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:02,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:34:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 02:34:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:34:02,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:34:03,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872956350] [2022-04-05 02:34:03,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443052261] [2022-04-05 02:34:03,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443052261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:03,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:03,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-04-05 02:34:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310509533] [2022-04-05 02:34:03,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:03,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 02:34:03,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 02:34:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-05 02:34:03,171 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 02:34:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:04,571 INFO L93 Difference]: Finished difference Result 217 states and 308 transitions. [2022-04-05 02:34:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 02:34:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-04-05 02:34:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:04,574 INFO L225 Difference]: With dead ends: 217 [2022-04-05 02:34:04,574 INFO L226 Difference]: Without dead ends: 217 [2022-04-05 02:34:04,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-04-05 02:34:04,575 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:04,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 290 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 622 Invalid, 0 Unknown, 115 Unchecked, 0.6s Time] [2022-04-05 02:34:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-05 02:34:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2022-04-05 02:34:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 111 states have internal predecessors, (135), 53 states have call successors, (53), 10 states have call predecessors, (53), 9 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 02:34:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 239 transitions. [2022-04-05 02:34:04,592 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 239 transitions. Word has length 47 [2022-04-05 02:34:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:04,592 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 239 transitions. [2022-04-05 02:34:04,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 02:34:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 239 transitions. [2022-04-05 02:34:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:34:04,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:04,593 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:04,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:04,793 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 [2022-04-05 02:34:04,794 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-04-05 02:34:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:04,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116446730] [2022-04-05 02:34:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:04,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133930076] [2022-04-05 02:34:04,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:34:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:04,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:04,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:34:04,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:34:04,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:34:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:34:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:34:04,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:34:04,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116446730] [2022-04-05 02:34:04,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133930076] [2022-04-05 02:34:04,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133930076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:34:04,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:34:04,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:34:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741127051] [2022-04-05 02:34:04,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:04,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:34:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:34:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:34:04,904 INFO L87 Difference]: Start difference. First operand 170 states and 239 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:34:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:04,966 INFO L93 Difference]: Finished difference Result 140 states and 188 transitions. [2022-04-05 02:34:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:34:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-05 02:34:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:04,967 INFO L225 Difference]: With dead ends: 140 [2022-04-05 02:34:04,967 INFO L226 Difference]: Without dead ends: 140 [2022-04-05 02:34:04,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:34:04,968 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:04,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:34:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-05 02:34:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2022-04-05 02:34:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-05 02:34:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2022-04-05 02:34:04,973 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 47 [2022-04-05 02:34:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:04,973 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2022-04-05 02:34:04,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:34:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2022-04-05 02:34:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 02:34:04,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:04,974 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:04,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-05 02:34:05,189 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 [2022-04-05 02:34:05,190 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-05 02:34:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:05,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443683183] [2022-04-05 02:34:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:05,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:05,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689031766] [2022-04-05 02:34:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:05,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:05,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:05,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:05,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 02:34:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:34:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 02:34:05,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:34:05,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443683183] [2022-04-05 02:34:05,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689031766] [2022-04-05 02:34:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689031766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:34:05,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:34:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:34:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782959931] [2022-04-05 02:34:05,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:05,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:34:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:34:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:34:05,318 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:34:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:05,358 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-04-05 02:34:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:34:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-05 02:34:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:05,360 INFO L225 Difference]: With dead ends: 165 [2022-04-05 02:34:05,360 INFO L226 Difference]: Without dead ends: 165 [2022-04-05 02:34:05,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:34:05,360 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:05,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:34:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-05 02:34:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-04-05 02:34:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 02:34:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-04-05 02:34:05,366 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-04-05 02:34:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:05,366 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-04-05 02:34:05,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:34:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-04-05 02:34:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 02:34:05,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:05,367 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:05,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:05,575 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 [2022-04-05 02:34:05,575 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-05 02:34:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:05,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56034624] [2022-04-05 02:34:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:05,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:05,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160850486] [2022-04-05 02:34:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:05,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:05,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:05,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 02:34:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 02:34:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 02:34:06,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 02:34:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56034624] [2022-04-05 02:34:06,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160850486] [2022-04-05 02:34:06,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160850486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:06,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:06,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 02:34:06,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059698084] [2022-04-05 02:34:06,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:06,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:34:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:34:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:34:06,344 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:34:10,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:11,933 INFO L93 Difference]: Finished difference Result 327 states and 482 transitions. [2022-04-05 02:34:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 02:34:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-04-05 02:34:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:11,935 INFO L225 Difference]: With dead ends: 327 [2022-04-05 02:34:11,935 INFO L226 Difference]: Without dead ends: 324 [2022-04-05 02:34:11,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 02:34:11,936 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 140 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 278 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:11,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 431 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1062 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-04-05 02:34:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-05 02:34:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 247. [2022-04-05 02:34:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 150 states have internal predecessors, (172), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 02:34:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 348 transitions. [2022-04-05 02:34:11,947 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 348 transitions. Word has length 64 [2022-04-05 02:34:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:11,947 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 348 transitions. [2022-04-05 02:34:11,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:34:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 348 transitions. [2022-04-05 02:34:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-05 02:34:11,948 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:11,949 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1] [2022-04-05 02:34:11,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:12,167 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 [2022-04-05 02:34:12,167 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-04-05 02:34:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:12,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063112500] [2022-04-05 02:34:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:12,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135639832] [2022-04-05 02:34:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:12,177 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) [2022-04-05 02:34:12,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 02:34:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 02:34:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-05 02:34:12,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-05 02:34:12,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063112500] [2022-04-05 02:34:12,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:12,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135639832] [2022-04-05 02:34:12,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135639832] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:34:12,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:34:12,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 02:34:12,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892283455] [2022-04-05 02:34:12,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:12,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:34:12,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:34:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:34:12,475 INFO L87 Difference]: Start difference. First operand 247 states and 348 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 02:34:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:12,508 INFO L93 Difference]: Finished difference Result 251 states and 351 transitions. [2022-04-05 02:34:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:34:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-05 02:34:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:12,510 INFO L225 Difference]: With dead ends: 251 [2022-04-05 02:34:12,510 INFO L226 Difference]: Without dead ends: 251 [2022-04-05 02:34:12,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:34:12,510 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:12,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:34:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-04-05 02:34:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-04-05 02:34:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 02:34:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 351 transitions. [2022-04-05 02:34:12,518 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 351 transitions. Word has length 74 [2022-04-05 02:34:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:12,518 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 351 transitions. [2022-04-05 02:34:12,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 02:34:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 351 transitions. [2022-04-05 02:34:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 02:34:12,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:12,519 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:12,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:12,734 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 [2022-04-05 02:34:12,735 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-04-05 02:34:12,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:12,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026453534] [2022-04-05 02:34:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:12,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393005491] [2022-04-05 02:34:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:12,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:12,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:12,744 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) [2022-04-05 02:34:12,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 02:34:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 02:34:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-05 02:34:13,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-05 02:34:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:13,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026453534] [2022-04-05 02:34:13,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:13,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393005491] [2022-04-05 02:34:13,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393005491] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:13,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:13,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-05 02:34:13,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452060132] [2022-04-05 02:34:13,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:13,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 02:34:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 02:34:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-05 02:34:13,271 INFO L87 Difference]: Start difference. First operand 251 states and 351 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:34:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:13,650 INFO L93 Difference]: Finished difference Result 318 states and 456 transitions. [2022-04-05 02:34:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 02:34:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-04-05 02:34:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:13,652 INFO L225 Difference]: With dead ends: 318 [2022-04-05 02:34:13,652 INFO L226 Difference]: Without dead ends: 318 [2022-04-05 02:34:13,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:34:13,652 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:13,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 02:34:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-05 02:34:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 255. [2022-04-05 02:34:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 02:34:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 354 transitions. [2022-04-05 02:34:13,664 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 354 transitions. Word has length 72 [2022-04-05 02:34:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:13,666 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 354 transitions. [2022-04-05 02:34:13,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:34:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 354 transitions. [2022-04-05 02:34:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 02:34:13,670 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:13,670 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:13,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-05 02:34:13,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 02:34:13,887 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-04-05 02:34:13,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557522866] [2022-04-05 02:34:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:13,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821035937] [2022-04-05 02:34:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:34:13,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:13,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:13,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:13,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 02:34:13,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:34:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:34:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 02:34:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 02:34:14,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:34:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557522866] [2022-04-05 02:34:14,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821035937] [2022-04-05 02:34:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821035937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:34:14,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:34:14,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:34:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838355213] [2022-04-05 02:34:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:34:14,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:34:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:34:14,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:34:14,064 INFO L87 Difference]: Start difference. First operand 255 states and 354 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 02:34:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:14,098 INFO L93 Difference]: Finished difference Result 263 states and 353 transitions. [2022-04-05 02:34:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:34:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-05 02:34:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:14,099 INFO L225 Difference]: With dead ends: 263 [2022-04-05 02:34:14,099 INFO L226 Difference]: Without dead ends: 263 [2022-04-05 02:34:14,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:34:14,099 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:14,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:34:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-04-05 02:34:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 251. [2022-04-05 02:34:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 155 states have internal predecessors, (181), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 02:34:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 341 transitions. [2022-04-05 02:34:14,108 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 341 transitions. Word has length 77 [2022-04-05 02:34:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:14,108 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 341 transitions. [2022-04-05 02:34:14,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 02:34:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 341 transitions. [2022-04-05 02:34:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 02:34:14,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:14,109 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:14,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:14,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 02:34:14,319 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-04-05 02:34:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:14,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242442778] [2022-04-05 02:34:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:14,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:14,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732034967] [2022-04-05 02:34:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:34:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:14,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:14,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 02:34:14,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 02:34:14,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:34:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 02:34:14,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 02:34:15,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 02:34:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242442778] [2022-04-05 02:34:16,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732034967] [2022-04-05 02:34:16,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732034967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:16,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:16,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-05 02:34:16,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788328621] [2022-04-05 02:34:16,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:16,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 02:34:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 02:34:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-04-05 02:34:16,143 INFO L87 Difference]: Start difference. First operand 251 states and 341 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 02:34:28,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:37,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:41,072 INFO L93 Difference]: Finished difference Result 408 states and 562 transitions. [2022-04-05 02:34:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 02:34:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-04-05 02:34:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:41,074 INFO L225 Difference]: With dead ends: 408 [2022-04-05 02:34:41,074 INFO L226 Difference]: Without dead ends: 408 [2022-04-05 02:34:41,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 02:34:41,076 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 218 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 383 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:41,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 535 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 1246 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2022-04-05 02:34:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-04-05 02:34:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 345. [2022-04-05 02:34:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 208 states have (on average 1.1971153846153846) internal successors, (249), 209 states have internal predecessors, (249), 115 states have call successors, (115), 22 states have call predecessors, (115), 21 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-04-05 02:34:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 477 transitions. [2022-04-05 02:34:41,084 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 477 transitions. Word has length 77 [2022-04-05 02:34:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:41,084 INFO L478 AbstractCegarLoop]: Abstraction has 345 states and 477 transitions. [2022-04-05 02:34:41,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 02:34:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 477 transitions. [2022-04-05 02:34:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 02:34:41,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:41,085 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-04-05 02:34:41,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:41,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:41,286 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-04-05 02:34:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:41,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787388813] [2022-04-05 02:34:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:41,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:41,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:41,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508869565] [2022-04-05 02:34:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:41,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:41,312 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 02:34:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-05 02:34:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-05 02:34:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-05 02:34:52,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787388813] [2022-04-05 02:34:52,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508869565] [2022-04-05 02:34:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508869565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:52,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:52,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-05 02:34:52,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210811797] [2022-04-05 02:34:52,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:52,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:34:52,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:34:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:34:52,613 INFO L87 Difference]: Start difference. First operand 345 states and 477 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-05 02:35:00,780 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 [] [2022-04-05 02:35:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:01,400 INFO L93 Difference]: Finished difference Result 452 states and 618 transitions. [2022-04-05 02:35:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 02:35:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-04-05 02:35:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:01,402 INFO L225 Difference]: With dead ends: 452 [2022-04-05 02:35:01,402 INFO L226 Difference]: Without dead ends: 450 [2022-04-05 02:35:01,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 02:35:01,403 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 345 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:01,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 322 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1065 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-04-05 02:35:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-05 02:35:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 370. [2022-04-05 02:35:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-05 02:35:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-04-05 02:35:01,412 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-04-05 02:35:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:01,412 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-04-05 02:35:01,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-05 02:35:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-04-05 02:35:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 02:35:01,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:01,413 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:01,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:01,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 02:35:01,630 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-04-05 02:35:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663015764] [2022-04-05 02:35:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:01,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:01,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005057598] [2022-04-05 02:35:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:01,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:01,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:01,643 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:01,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 02:35:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 02:35:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 02:35:01,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 02:35:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:02,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663015764] [2022-04-05 02:35:02,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005057598] [2022-04-05 02:35:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005057598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:02,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 02:35:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368304051] [2022-04-05 02:35:02,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:02,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:35:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:35:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:35:02,592 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 02:35:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:03,873 INFO L93 Difference]: Finished difference Result 895 states and 1390 transitions. [2022-04-05 02:35:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 02:35:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-04-05 02:35:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:03,876 INFO L225 Difference]: With dead ends: 895 [2022-04-05 02:35:03,876 INFO L226 Difference]: Without dead ends: 895 [2022-04-05 02:35:03,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-04-05 02:35:03,877 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 108 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:03,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 364 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 02:35:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-04-05 02:35:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-04-05 02:35:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-04-05 02:35:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-04-05 02:35:03,898 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-04-05 02:35:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:03,898 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-04-05 02:35:03,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 02:35:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-04-05 02:35:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 02:35:03,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:03,899 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-04-05 02:35:03,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:04,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 02:35:04,115 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-04-05 02:35:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508008546] [2022-04-05 02:35:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:04,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:04,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:04,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698630040] [2022-04-05 02:35:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:04,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:04,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:04,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:04,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 02:35:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 02:35:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-05 02:35:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 02:35:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508008546] [2022-04-05 02:35:05,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698630040] [2022-04-05 02:35:05,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698630040] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:05,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:05,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-05 02:35:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84923090] [2022-04-05 02:35:05,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:05,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 02:35:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 02:35:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:35:05,208 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 02:35:11,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:13,770 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 [] [2022-04-05 02:35:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:17,679 INFO L93 Difference]: Finished difference Result 927 states and 1488 transitions. [2022-04-05 02:35:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 02:35:17,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-04-05 02:35:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:17,683 INFO L225 Difference]: With dead ends: 927 [2022-04-05 02:35:17,683 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 02:35:17,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 02:35:17,684 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 82 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 222 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:17,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 248 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 603 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-04-05 02:35:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 02:35:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 02:35:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 02:35:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 02:35:17,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-04-05 02:35:17,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:17,684 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 02:35:17,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 02:35:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 02:35:17,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 02:35:17,687 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 02:35:17,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-05 02:35:17,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 02:35:17,890 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:17,891 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 02:35:17,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:35:17 BasicIcfg [2022-04-05 02:35:17,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 02:35:17,893 INFO L158 Benchmark]: Toolchain (without parser) took 80315.27ms. Allocated memory was 207.6MB in the beginning and 299.9MB in the end (delta: 92.3MB). Free memory was 154.9MB in the beginning and 143.0MB in the end (delta: 11.9MB). Peak memory consumption was 104.9MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,893 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 171.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:35:17,893 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.95ms. Allocated memory is still 207.6MB. Free memory was 154.7MB in the beginning and 180.1MB in the end (delta: -25.4MB). Peak memory consumption was 8.3MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,893 INFO L158 Benchmark]: Boogie Preprocessor took 21.42ms. Allocated memory is still 207.6MB. Free memory was 180.1MB in the beginning and 178.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,893 INFO L158 Benchmark]: RCFGBuilder took 255.75ms. Allocated memory is still 207.6MB. Free memory was 178.5MB in the beginning and 166.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,893 INFO L158 Benchmark]: IcfgTransformer took 20.59ms. Allocated memory is still 207.6MB. Free memory was 166.9MB in the beginning and 165.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,894 INFO L158 Benchmark]: TraceAbstraction took 79800.19ms. Allocated memory was 207.6MB in the beginning and 299.9MB in the end (delta: 92.3MB). Free memory was 165.2MB in the beginning and 143.0MB in the end (delta: 22.2MB). Peak memory consumption was 114.4MB. Max. memory is 8.0GB. [2022-04-05 02:35:17,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory is still 171.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.95ms. Allocated memory is still 207.6MB. Free memory was 154.7MB in the beginning and 180.1MB in the end (delta: -25.4MB). Peak memory consumption was 8.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.42ms. Allocated memory is still 207.6MB. Free memory was 180.1MB in the beginning and 178.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 255.75ms. Allocated memory is still 207.6MB. Free memory was 178.5MB in the beginning and 166.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.59ms. Allocated memory is still 207.6MB. Free memory was 166.9MB in the beginning and 165.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 79800.19ms. Allocated memory was 207.6MB in the beginning and 299.9MB in the end (delta: 92.3MB). Free memory was 165.2MB in the beginning and 143.0MB in the end (delta: 22.2MB). Peak memory consumption was 114.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 79.7s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 55.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 1186 SdHoareTripleChecker+Valid, 31.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1123 mSDsluCounter, 4147 SdHoareTripleChecker+Invalid, 30.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 115 IncrementalHoareTripleChecker+Unchecked, 3231 mSDsCounter, 1690 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6440 IncrementalHoareTripleChecker+Invalid, 8250 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1690 mSolverCounterUnsat, 916 mSDtfsCounter, 6440 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1974 GetRequests, 1626 SyntacticMatches, 18 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 27.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 509 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 18.8s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9373 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 02:35:17,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...