/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/sqrt1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:51:58,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:51:58,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:51:58,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 19:51:58,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 19:51:58,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 19:51:58,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 19:51:58,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 19:51:58,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 19:51:58,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 19:51:58,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 19:51:58,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 19:51:58,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 19:51:58,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 19:51:58,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 19:51:58,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 19:51:58,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 19:51:58,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 19:51:58,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 19:51:58,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 19:51:58,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:51:58,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:51:58,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:51:58,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:51:58,744 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:51:58,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:51:58,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:51:58,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:51:58,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:51:58,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:51:58,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:51:58,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:51:58,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:51:58,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:51:58,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:51:58,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:51:58,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:51:58,747 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:51:58,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:51:58,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:51:59,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:51:59,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:51:59,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:51:59,018 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:51:59,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-02-23 19:51:59,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673022ccf/edbb1e30a26544278d675dbdf25fcbad/FLAGecdc77b99 [2022-02-23 19:51:59,480 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:51:59,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-02-23 19:51:59,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673022ccf/edbb1e30a26544278d675dbdf25fcbad/FLAGecdc77b99 [2022-02-23 19:51:59,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673022ccf/edbb1e30a26544278d675dbdf25fcbad [2022-02-23 19:51:59,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:51:59,877 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:51:59,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:51:59,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:51:59,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:51:59,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:51:59" (1/1) ... [2022-02-23 19:51:59,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db15996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:51:59, skipping insertion in model container [2022-02-23 19:51:59,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:51:59" (1/1) ... [2022-02-23 19:51:59,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:51:59,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:52:00,056 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/sqrt1-ll_unwindbound20.c[520,533] [2022-02-23 19:52:00,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:52:00,088 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:52:00,102 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/sqrt1-ll_unwindbound20.c[520,533] [2022-02-23 19:52:00,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:52:00,130 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:52:00,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00 WrapperNode [2022-02-23 19:52:00,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:52:00,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:52:00,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:52:00,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:52:00,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:52:00,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:52:00,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:52:00,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:52:00,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:52:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:00,196 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) [2022-02-23 19:52:00,223 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 [2022-02-23 19:52:00,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:52:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:52:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:52:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 19:52:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 19:52:00,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 19:52:00,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 19:52:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:52:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:52:00,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:52:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:52:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:52:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:52:00,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:52:00,303 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:52:00,305 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:52:00,456 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:52:00,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:52:00,461 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:52:00,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:52:00 BoogieIcfgContainer [2022-02-23 19:52:00,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:52:00,469 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:52:00,470 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:52:00,475 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:52:00,477 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:52:00" (1/1) ... [2022-02-23 19:52:00,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:52:00 BasicIcfg [2022-02-23 19:52:00,509 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:52:00,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:52:00,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:52:00,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:52:00,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:51:59" (1/4) ... [2022-02-23 19:52:00,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b05c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:52:00, skipping insertion in model container [2022-02-23 19:52:00,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:52:00" (2/4) ... [2022-02-23 19:52:00,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b05c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:52:00, skipping insertion in model container [2022-02-23 19:52:00,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:52:00" (3/4) ... [2022-02-23 19:52:00,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b05c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:52:00, skipping insertion in model container [2022-02-23 19:52:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:52:00" (4/4) ... [2022-02-23 19:52:00,515 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.cJordan [2022-02-23 19:52:00,519 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:52:00,520 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:52:00,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:52:00,578 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:52:00,579 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:52:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 19:52:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 19:52:00,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:00,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:00,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2022-02-23 19:52:00,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:00,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48852826] [2022-02-23 19:52:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:52:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:52:00,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:00,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48852826] [2022-02-23 19:52:00,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48852826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:52:00,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:52:00,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 19:52:00,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72534237] [2022-02-23 19:52:00,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 19:52:00,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 19:52:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:52:00,831 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:00,896 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-02-23 19:52:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 19:52:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 19:52:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:00,906 INFO L225 Difference]: With dead ends: 27 [2022-02-23 19:52:00,906 INFO L226 Difference]: Without dead ends: 22 [2022-02-23 19:52:00,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 19:52:00,910 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:00,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:52:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-23 19:52:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-23 19:52:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:52:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-02-23 19:52:00,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-02-23 19:52:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:00,940 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-02-23 19:52:00,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-02-23 19:52:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 19:52:00,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:00,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:00,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:52:00,942 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2022-02-23 19:52:00,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:00,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203759651] [2022-02-23 19:52:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:52:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:52:01,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:01,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203759651] [2022-02-23 19:52:01,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203759651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:52:01,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:52:01,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:52:01,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354141564] [2022-02-23 19:52:01,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:01,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:52:01,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:52:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:52:01,016 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:01,078 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-02-23 19:52:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 19:52:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 19:52:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:01,080 INFO L225 Difference]: With dead ends: 23 [2022-02-23 19:52:01,080 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 19:52:01,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:52:01,081 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:01,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:52:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 19:52:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-23 19:52:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 19:52:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-02-23 19:52:01,088 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-02-23 19:52:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:01,088 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-02-23 19:52:01,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-02-23 19:52:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 19:52:01,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:01,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:01,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 19:52:01,090 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2022-02-23 19:52:01,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:01,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617629597] [2022-02-23 19:52:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:52:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:52:01,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:01,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617629597] [2022-02-23 19:52:01,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617629597] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:52:01,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:52:01,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 19:52:01,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902368631] [2022-02-23 19:52:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 19:52:01,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 19:52:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:52:01,219 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:01,360 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-02-23 19:52:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 19:52:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 19:52:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:01,361 INFO L225 Difference]: With dead ends: 34 [2022-02-23 19:52:01,361 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 19:52:01,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 19:52:01,363 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:01,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:52:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 19:52:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-02-23 19:52:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 19:52:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-23 19:52:01,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-02-23 19:52:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:01,372 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-23 19:52:01,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 19:52:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-23 19:52:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 19:52:01,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:01,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:01,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 19:52:01,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2022-02-23 19:52:01,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:01,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084119069] [2022-02-23 19:52:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:01,387 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:52:01,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424401346] [2022-02-23 19:52:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:01,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:01,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:01,390 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) [2022-02-23 19:52:01,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 19:52:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:52:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:52:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:52:01,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:52:01,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:01,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084119069] [2022-02-23 19:52:01,598 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:52:01,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424401346] [2022-02-23 19:52:01,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424401346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:52:01,599 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:52:01,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:52:01,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10692721] [2022-02-23 19:52:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:01,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:52:01,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:52:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:52:01,603 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:52:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:01,666 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-23 19:52:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:52:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-23 19:52:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:01,670 INFO L225 Difference]: With dead ends: 38 [2022-02-23 19:52:01,670 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 19:52:01,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:52:01,672 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:01,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:52:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 19:52:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-23 19:52:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 19:52:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-02-23 19:52:01,680 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-02-23 19:52:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:01,680 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-02-23 19:52:01,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 19:52:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-02-23 19:52:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 19:52:01,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:01,681 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:01,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 19:52:01,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:01,884 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:01,884 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2022-02-23 19:52:01,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:01,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20421058] [2022-02-23 19:52:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:01,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:01,898 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:52:01,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268610584] [2022-02-23 19:52:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:01,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:01,901 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) [2022-02-23 19:52:01,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 19:52:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:52:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:52:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 19:52:02,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 19:52:02,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:02,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20421058] [2022-02-23 19:52:02,093 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:52:02,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268610584] [2022-02-23 19:52:02,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268610584] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:52:02,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:52:02,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 19:52:02,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355647195] [2022-02-23 19:52:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:52:02,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:52:02,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 19:52:02,099 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:52:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:02,142 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-23 19:52:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:52:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 19:52:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:02,146 INFO L225 Difference]: With dead ends: 42 [2022-02-23 19:52:02,146 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 19:52:02,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 19:52:02,150 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:02,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:52:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 19:52:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-23 19:52:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 19:52:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-02-23 19:52:02,159 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-02-23 19:52:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:02,160 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-02-23 19:52:02,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 19:52:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-02-23 19:52:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:52:02,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:02,161 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:02,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 19:52:02,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:02,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2022-02-23 19:52:02,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:02,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42650817] [2022-02-23 19:52:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:02,374 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:52:02,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000743642] [2022-02-23 19:52:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:02,376 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) [2022-02-23 19:52:02,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 19:52:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 19:52:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:52:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 19:52:02,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:52:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 19:52:02,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:02,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42650817] [2022-02-23 19:52:02,616 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:52:02,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000743642] [2022-02-23 19:52:02,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000743642] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:52:02,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:52:02,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 19:52:02,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883247716] [2022-02-23 19:52:02,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:52:02,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:52:02,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:52:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:52:02,619 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 19:52:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:02,732 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2022-02-23 19:52:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 19:52:02,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-02-23 19:52:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:02,734 INFO L225 Difference]: With dead ends: 71 [2022-02-23 19:52:02,734 INFO L226 Difference]: Without dead ends: 71 [2022-02-23 19:52:02,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:52:02,735 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:02,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 116 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:52:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-23 19:52:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-02-23 19:52:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 19:52:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-02-23 19:52:02,744 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-02-23 19:52:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:02,745 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-02-23 19:52:02,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 19:52:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-02-23 19:52:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:52:02,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:02,746 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:02,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 19:52:02,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:02,970 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:02,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2022-02-23 19:52:02,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:02,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094036511] [2022-02-23 19:52:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:02,980 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:52:02,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865971881] [2022-02-23 19:52:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:02,984 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) [2022-02-23 19:52:02,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 19:52:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:52:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 19:52:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:52:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 19:52:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:52:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 19:52:03,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:03,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094036511] [2022-02-23 19:52:03,238 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:52:03,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865971881] [2022-02-23 19:52:03,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865971881] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 19:52:03,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 19:52:03,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 19:52:03,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299828249] [2022-02-23 19:52:03,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:52:03,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 19:52:03,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:03,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 19:52:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 19:52:03,241 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:52:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:03,283 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-02-23 19:52:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 19:52:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-23 19:52:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:03,285 INFO L225 Difference]: With dead ends: 79 [2022-02-23 19:52:03,285 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 19:52:03,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:52:03,286 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:03,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:52:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 19:52:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-23 19:52:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 19:52:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-02-23 19:52:03,294 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-02-23 19:52:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:03,295 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-02-23 19:52:03,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 19:52:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-02-23 19:52:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 19:52:03,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:52:03,296 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:03,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 19:52:03,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:03,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:52:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:52:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2022-02-23 19:52:03,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:52:03,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938900502] [2022-02-23 19:52:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:52:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:52:03,514 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 19:52:03,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739896353] [2022-02-23 19:52:03,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 19:52:03,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:52:03,516 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) [2022-02-23 19:52:03,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 19:52:03,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 19:52:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 19:52:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 19:52:03,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 19:52:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 19:52:03,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 19:52:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 19:52:03,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:52:03,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938900502] [2022-02-23 19:52:03,771 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 19:52:03,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739896353] [2022-02-23 19:52:03,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739896353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 19:52:03,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 19:52:03,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 19:52:03,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408348913] [2022-02-23 19:52:03,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 19:52:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 19:52:03,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:52:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 19:52:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 19:52:03,773 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 19:52:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:52:03,896 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-02-23 19:52:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 19:52:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-02-23 19:52:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:52:03,896 INFO L225 Difference]: With dead ends: 77 [2022-02-23 19:52:03,897 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 19:52:03,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-23 19:52:03,897 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:52:03,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:52:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 19:52:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 19:52:03,898 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) [2022-02-23 19:52:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 19:52:03,899 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-02-23 19:52:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:52:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 19:52:03,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 19:52:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 19:52:03,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 19:52:03,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 19:52:03,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 19:52:04,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 19:52:04,122 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-02-23 19:52:04,123 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 19:52:04,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:52:04 BasicIcfg [2022-02-23 19:52:04,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 19:52:04,126 INFO L158 Benchmark]: Toolchain (without parser) took 4248.75ms. Allocated memory was 176.2MB in the beginning and 239.1MB in the end (delta: 62.9MB). Free memory was 120.1MB in the beginning and 117.8MB in the end (delta: 2.2MB). Peak memory consumption was 66.3MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,126 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:52:04,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.39ms. Allocated memory is still 176.2MB. Free memory was 119.8MB in the beginning and 145.9MB in the end (delta: -26.1MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,127 INFO L158 Benchmark]: Boogie Preprocessor took 37.01ms. Allocated memory is still 176.2MB. Free memory was 145.9MB in the beginning and 144.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,127 INFO L158 Benchmark]: RCFGBuilder took 299.44ms. Allocated memory is still 176.2MB. Free memory was 144.4MB in the beginning and 134.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,127 INFO L158 Benchmark]: IcfgTransformer took 39.22ms. Allocated memory is still 176.2MB. Free memory was 134.4MB in the beginning and 133.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,128 INFO L158 Benchmark]: TraceAbstraction took 3615.76ms. Allocated memory was 176.2MB in the beginning and 239.1MB in the end (delta: 62.9MB). Free memory was 132.8MB in the beginning and 117.8MB in the end (delta: 15.0MB). Peak memory consumption was 79.0MB. Max. memory is 8.0GB. [2022-02-23 19:52:04,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 176.2MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 251.39ms. Allocated memory is still 176.2MB. Free memory was 119.8MB in the beginning and 145.9MB in the end (delta: -26.1MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.01ms. Allocated memory is still 176.2MB. Free memory was 145.9MB in the beginning and 144.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 299.44ms. Allocated memory is still 176.2MB. Free memory was 144.4MB in the beginning and 134.4MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 39.22ms. Allocated memory is still 176.2MB. Free memory was 134.4MB in the beginning and 133.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3615.76ms. Allocated memory was 176.2MB in the beginning and 239.1MB in the end (delta: 62.9MB). Free memory was 132.8MB in the beginning and 117.8MB in the end (delta: 15.0MB). Peak memory consumption was 79.0MB. 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: 14]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 108 mSDsluCounter, 651 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 427 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 343 IncrementalHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 224 mSDtfsCounter, 343 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 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! [2022-02-23 19:52:04,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...