/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:08:16,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:08:16,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:08:16,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:08:16,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:08:16,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:08:16,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:08:16,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:08:16,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:08:16,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:08:16,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:08:16,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:08:16,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:08:16,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:08:16,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:08:16,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:08:16,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:08:16,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:08:16,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:08:16,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:08:16,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:08:16,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:08:16,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:08:16,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:08:16,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 23:08:16,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:08:16,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:08:16,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:08:16,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:08:16,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:08:16,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:08:16,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:08:16,400 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:08:16,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:08:16,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:08:16,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:08:16,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:08:16,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:08:16,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:08:16,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:08:16,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:08:16,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:08:16,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:08:16,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:08:16,403 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:08:16,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:08:16,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:08:16,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:08:16,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:08:16,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:08:16,615 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:08:16,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-02-14 23:08:16,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7384d56db/6850c237c7b8433ca90a0536892839a0/FLAG0b9f6bbac [2022-02-14 23:08:16,959 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:08:16,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-02-14 23:08:16,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7384d56db/6850c237c7b8433ca90a0536892839a0/FLAG0b9f6bbac [2022-02-14 23:08:17,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7384d56db/6850c237c7b8433ca90a0536892839a0 [2022-02-14 23:08:17,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:08:17,390 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:08:17,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:08:17,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:08:17,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:08:17,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5caa7b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17, skipping insertion in model container [2022-02-14 23:08:17,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:08:17,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:08:17,556 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/hard-ll_valuebound100.c[538,551] [2022-02-14 23:08:17,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:08:17,576 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:08:17,603 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/hard-ll_valuebound100.c[538,551] [2022-02-14 23:08:17,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:08:17,640 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:08:17,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17 WrapperNode [2022-02-14 23:08:17,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:08:17,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:08:17,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:08:17,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:08:17,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:08:17,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:08:17,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:08:17,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:08:17,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:08:17,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:17,712 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) [2022-02-14 23:08:17,733 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 [2022-02-14 23:08:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:08:17,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:08:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:08:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:08:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:08:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 23:08:17,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:08:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:08:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:08:17,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:08:17,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:08:17,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:08:17,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:08:17,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:08:17,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:08:17,809 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:08:17,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:08:17,924 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:08:17,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:08:17,929 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:08:17,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:08:17 BoogieIcfgContainer [2022-02-14 23:08:17,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:08:17,931 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:08:17,931 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:08:17,932 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:08:17,934 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:08:17" (1/1) ... [2022-02-14 23:08:17,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:08:17 BasicIcfg [2022-02-14 23:08:17,950 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:08:17,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:08:17,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:08:17,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:08:17,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:08:17" (1/4) ... [2022-02-14 23:08:17,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b845a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:08:17, skipping insertion in model container [2022-02-14 23:08:17,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:08:17" (2/4) ... [2022-02-14 23:08:17,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b845a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:08:17, skipping insertion in model container [2022-02-14 23:08:17,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:08:17" (3/4) ... [2022-02-14 23:08:17,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b845a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:08:17, skipping insertion in model container [2022-02-14 23:08:17,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:08:17" (4/4) ... [2022-02-14 23:08:17,965 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.cJordan [2022-02-14 23:08:17,969 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:08:17,969 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:08:18,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:08:18,040 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 [2022-02-14 23:08:18,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:08:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 23:08:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:08:18,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:18,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:18,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-02-14 23:08:18,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:18,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706223486] [2022-02-14 23:08:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:08:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:08:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:08:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:08:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:08:18,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:18,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706223486] [2022-02-14 23:08:18,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706223486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:08:18,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:08:18,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:08:18,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519910784] [2022-02-14 23:08:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:08:18,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:08:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:08:18,358 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:08:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:18,426 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-14 23:08:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:08:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 23:08:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:18,434 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:08:18,434 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 23:08:18,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:08:18,438 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:18,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:08:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 23:08:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 23:08:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:08:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-14 23:08:18,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-14 23:08:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:18,469 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-14 23:08:18,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:08:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-14 23:08:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:08:18,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:18,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:18,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:08:18,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-02-14 23:08:18,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:18,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91258567] [2022-02-14 23:08:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:08:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:08:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:08:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:08:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:08:18,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91258567] [2022-02-14 23:08:18,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91258567] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:08:18,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:08:18,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:08:18,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750183582] [2022-02-14 23:08:18,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:08:18,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:08:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:08:18,570 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:08:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:18,742 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-14 23:08:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:08:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-14 23:08:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:18,743 INFO L225 Difference]: With dead ends: 44 [2022-02-14 23:08:18,743 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 23:08:18,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:08:18,745 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:18,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:08:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 23:08:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-14 23:08:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:08:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 23:08:18,756 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-14 23:08:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:18,756 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 23:08:18,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-14 23:08:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 23:08:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 23:08:18,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:18,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:08:18,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-02-14 23:08:18,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:18,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985238435] [2022-02-14 23:08:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:08:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:08:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 23:08:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 23:08:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-14 23:08:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:08:18,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:18,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985238435] [2022-02-14 23:08:18,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985238435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:08:18,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:08:18,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:08:18,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777507053] [2022-02-14 23:08:18,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:18,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:08:18,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:08:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:08:18,867 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:08:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:19,051 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-02-14 23:08:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:08:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-14 23:08:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:19,055 INFO L225 Difference]: With dead ends: 48 [2022-02-14 23:08:19,055 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 23:08:19,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:08:19,061 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:19,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:08:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 23:08:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-14 23:08:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:08:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-14 23:08:19,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-14 23:08:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-14 23:08:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:08:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-14 23:08:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 23:08:19,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:19,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 23:08:19,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-02-14 23:08:19,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:19,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604083245] [2022-02-14 23:08:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:19,089 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:19,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586144614] [2022-02-14 23:08:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:19,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:19,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:19,091 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) [2022-02-14 23:08:19,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 23:08:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 23:08:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-14 23:08:19,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:08:19,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:19,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604083245] [2022-02-14 23:08:19,401 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:19,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586144614] [2022-02-14 23:08:19,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586144614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:08:19,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:08:19,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 23:08:19,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64383307] [2022-02-14 23:08:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:19,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:08:19,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:08:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:08:19,403 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 23:08:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:19,516 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-02-14 23:08:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:08:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-02-14 23:08:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:19,518 INFO L225 Difference]: With dead ends: 56 [2022-02-14 23:08:19,518 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 23:08:19,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:08:19,519 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:19,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:08:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 23:08:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-14 23:08:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 23:08:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-14 23:08:19,527 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-02-14 23:08:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:19,527 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-14 23:08:19,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-14 23:08:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-14 23:08:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 23:08:19,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:19,529 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:19,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:19,751 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 [2022-02-14 23:08:19,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-02-14 23:08:19,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:19,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029998785] [2022-02-14 23:08:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:19,771 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:19,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251552307] [2022-02-14 23:08:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:19,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:19,788 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) [2022-02-14 23:08:19,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 23:08:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 23:08:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-14 23:08:20,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 23:08:20,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:20,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029998785] [2022-02-14 23:08:20,359 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:20,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251552307] [2022-02-14 23:08:20,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251552307] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:08:20,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:08:20,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 23:08:20,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849556616] [2022-02-14 23:08:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:20,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:08:20,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:08:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:08:20,363 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:08:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:20,408 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-02-14 23:08:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:08:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-02-14 23:08:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:20,410 INFO L225 Difference]: With dead ends: 66 [2022-02-14 23:08:20,410 INFO L226 Difference]: Without dead ends: 66 [2022-02-14 23:08:20,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:08:20,411 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:20,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:08:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-14 23:08:20,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-02-14 23:08:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 23:08:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-02-14 23:08:20,418 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-02-14 23:08:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:20,418 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-02-14 23:08:20,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:08:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-02-14 23:08:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 23:08:20,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:20,420 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:20,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:20,642 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 [2022-02-14 23:08:20,642 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-02-14 23:08:20,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:20,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599995881] [2022-02-14 23:08:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:20,654 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:20,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608675362] [2022-02-14 23:08:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:20,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:20,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:20,655 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) [2022-02-14 23:08:20,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 23:08:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 23:08:20,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-14 23:08:20,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:08:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-02-14 23:08:21,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:21,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599995881] [2022-02-14 23:08:21,063 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:21,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608675362] [2022-02-14 23:08:21,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608675362] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:08:21,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:08:21,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-14 23:08:21,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57369684] [2022-02-14 23:08:21,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:21,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:08:21,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:08:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:08:21,065 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:08:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:21,121 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-02-14 23:08:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:08:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-02-14 23:08:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:21,122 INFO L225 Difference]: With dead ends: 74 [2022-02-14 23:08:21,123 INFO L226 Difference]: Without dead ends: 74 [2022-02-14 23:08:21,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:08:21,124 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:21,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:08:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-14 23:08:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-02-14 23:08:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 23:08:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-14 23:08:21,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-02-14 23:08:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:21,131 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-14 23:08:21,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 23:08:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-14 23:08:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-14 23:08:21,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:21,132 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:21,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 23:08:21,335 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 [2022-02-14 23:08:21,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-02-14 23:08:21,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:21,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040150385] [2022-02-14 23:08:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:21,348 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:21,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207521144] [2022-02-14 23:08:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:21,350 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) [2022-02-14 23:08:21,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 23:08:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:08:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 23:08:21,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:08:21,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:08:21,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040150385] [2022-02-14 23:08:21,525 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:08:21,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207521144] [2022-02-14 23:08:21,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207521144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:08:21,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:08:21,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:08:21,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910302347] [2022-02-14 23:08:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:08:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:08:21,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:08:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:08:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:08:21,527 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 23:08:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:08:21,571 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-02-14 23:08:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:08:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-02-14 23:08:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:08:21,573 INFO L225 Difference]: With dead ends: 77 [2022-02-14 23:08:21,573 INFO L226 Difference]: Without dead ends: 72 [2022-02-14 23:08:21,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:08:21,574 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:08:21,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:08:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-14 23:08:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-02-14 23:08:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 23:08:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-02-14 23:08:21,581 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-02-14 23:08:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:08:21,581 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-02-14 23:08:21,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-14 23:08:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-02-14 23:08:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-14 23:08:21,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:08:21,583 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:08:21,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 23:08:21,803 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 [2022-02-14 23:08:21,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:08:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:08:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-02-14 23:08:21,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:08:21,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680396501] [2022-02-14 23:08:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:08:21,815 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:08:21,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92963405] [2022-02-14 23:08:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:08:21,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:08:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:08:21,818 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) [2022-02-14 23:08:21,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 23:08:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:08:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 23:08:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:08:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-14 23:08:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:09:01,190 WARN L228 SmtUtils]: Spent 23.20s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:10:16,203 WARN L228 SmtUtils]: Spent 19.68s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:11:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-14 23:11:22,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:11:22,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680396501] [2022-02-14 23:11:22,468 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:11:22,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92963405] [2022-02-14 23:11:22,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92963405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:11:22,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:11:22,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-02-14 23:11:22,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233808483] [2022-02-14 23:11:22,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:11:22,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 23:11:22,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:11:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 23:11:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-02-14 23:11:22,470 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-14 23:11:24,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:11:30,675 WARN L228 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:11:37,629 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-02-14 23:11:39,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:11:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:11:41,385 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2022-02-14 23:11:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 23:11:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-02-14 23:11:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:11:41,387 INFO L225 Difference]: With dead ends: 117 [2022-02-14 23:11:41,387 INFO L226 Difference]: Without dead ends: 117 [2022-02-14 23:11:41,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=4, NotChecked=42, Total=552 [2022-02-14 23:11:41,388 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 131 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-14 23:11:41,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 284 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 342 Invalid, 2 Unknown, 6 Unchecked, 6.7s Time] [2022-02-14 23:11:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-14 23:11:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-02-14 23:11:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:11:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-02-14 23:11:41,397 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-02-14 23:11:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:11:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-02-14 23:11:41,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-14 23:11:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-02-14 23:11:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-14 23:11:41,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:11:41,399 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:11:41,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 23:11:41,615 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 [2022-02-14 23:11:41,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:11:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:11:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-02-14 23:11:41,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:11:41,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142549815] [2022-02-14 23:11:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:11:41,626 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:11:41,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128211901] [2022-02-14 23:11:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:11:41,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:11:41,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 23:11:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:11:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:11:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:11:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-14 23:11:41,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:11:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-14 23:11:42,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:11:42,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142549815] [2022-02-14 23:11:42,139 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:11:42,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128211901] [2022-02-14 23:11:42,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128211901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:11:42,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:11:42,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-02-14 23:11:42,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158525890] [2022-02-14 23:11:42,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:11:42,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:11:42,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:11:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:11:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:11:42,141 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 23:11:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:11:42,275 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-02-14 23:11:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:11:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-02-14 23:11:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:11:42,276 INFO L225 Difference]: With dead ends: 114 [2022-02-14 23:11:42,276 INFO L226 Difference]: Without dead ends: 114 [2022-02-14 23:11:42,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:11:42,277 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:11:42,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 258 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:11:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-14 23:11:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-02-14 23:11:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 23:11:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-02-14 23:11:42,285 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-02-14 23:11:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:11:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-02-14 23:11:42,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 23:11:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-02-14 23:11:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-14 23:11:42,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:11:42,286 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:11:42,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 23:11:42,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:42,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:11:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:11:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-02-14 23:11:42,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:11:42,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168688554] [2022-02-14 23:11:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:11:42,508 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:11:42,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164940802] [2022-02-14 23:11:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:11:42,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:11:42,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:11:42,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 23:11:42,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:11:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:11:42,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:11:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:11:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-14 23:11:42,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:11:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-14 23:11:42,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:11:42,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168688554] [2022-02-14 23:11:42,856 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:11:42,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164940802] [2022-02-14 23:11:42,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164940802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:11:42,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:11:42,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-02-14 23:11:42,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357294850] [2022-02-14 23:11:42,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:11:42,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:11:42,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:11:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:11:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:11:42,858 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 23:11:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:11:42,952 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-02-14 23:11:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 23:11:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-02-14 23:11:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:11:42,954 INFO L225 Difference]: With dead ends: 111 [2022-02-14 23:11:42,954 INFO L226 Difference]: Without dead ends: 111 [2022-02-14 23:11:42,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:11:42,955 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:11:42,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:11:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-14 23:11:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-14 23:11:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 23:11:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-02-14 23:11:42,962 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-02-14 23:11:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:11:42,963 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-02-14 23:11:42,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-14 23:11:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-02-14 23:11:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 23:11:42,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:11:42,964 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:11:42,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 23:11:43,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:43,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:11:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:11:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-02-14 23:11:43,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:11:43,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49717250] [2022-02-14 23:11:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:11:43,193 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:11:43,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145982662] [2022-02-14 23:11:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:43,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:43,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:11:43,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:11:43,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 23:11:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:11:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 23:11:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:11:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:11:43,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:11:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-14 23:11:43,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:11:43,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49717250] [2022-02-14 23:11:43,842 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:11:43,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145982662] [2022-02-14 23:11:43,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145982662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:11:43,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:11:43,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-02-14 23:11:43,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607472166] [2022-02-14 23:11:43,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:11:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 23:11:43,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:11:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 23:11:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:11:43,844 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:11:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:11:44,099 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-02-14 23:11:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 23:11:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-02-14 23:11:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:11:44,101 INFO L225 Difference]: With dead ends: 117 [2022-02-14 23:11:44,101 INFO L226 Difference]: Without dead ends: 102 [2022-02-14 23:11:44,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:11:44,102 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:11:44,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 408 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:11:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-14 23:11:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-14 23:11:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:11:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-02-14 23:11:44,108 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-02-14 23:11:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:11:44,119 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-02-14 23:11:44,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:11:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-02-14 23:11:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-14 23:11:44,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:11:44,120 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:11:44,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 23:11:44,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 23:11:44,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:11:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:11:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-02-14 23:11:44,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:11:44,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355672843] [2022-02-14 23:11:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:44,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:11:44,343 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:11:44,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770462147] [2022-02-14 23:11:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:44,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:44,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:11:44,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:11:44,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 23:11:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:11:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 23:11:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:11:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-02-14 23:11:44,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:11:44,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:11:44,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355672843] [2022-02-14 23:11:44,567 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:11:44,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770462147] [2022-02-14 23:11:44,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770462147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:11:44,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:11:44,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:11:44,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288861396] [2022-02-14 23:11:44,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:11:44,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:11:44,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:11:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:11:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:11:44,568 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 23:11:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:11:44,603 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-02-14 23:11:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:11:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-02-14 23:11:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:11:44,604 INFO L225 Difference]: With dead ends: 104 [2022-02-14 23:11:44,604 INFO L226 Difference]: Without dead ends: 104 [2022-02-14 23:11:44,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:11:44,605 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:11:44,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:11:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-14 23:11:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-14 23:11:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:11:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-02-14 23:11:44,611 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-02-14 23:11:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:11:44,612 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-02-14 23:11:44,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 23:11:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-02-14 23:11:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-14 23:11:44,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:11:44,613 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:11:44,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 23:11:44,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:44,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:11:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:11:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-02-14 23:11:44,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:11:44,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088944005] [2022-02-14 23:11:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:11:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:11:44,843 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:11:44,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131668747] [2022-02-14 23:11:44,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:11:44,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:11:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:11:44,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:11:44,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 23:11:44,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 23:11:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:11:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-14 23:11:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:11:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-02-14 23:11:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:12:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-02-14 23:12:32,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:12:32,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088944005] [2022-02-14 23:12:32,988 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:12:32,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131668747] [2022-02-14 23:12:32,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131668747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:12:32,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:12:32,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-02-14 23:12:32,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453149106] [2022-02-14 23:12:32,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:12:32,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 23:12:32,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:12:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 23:12:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=419, Unknown=2, NotChecked=0, Total=506 [2022-02-14 23:12:32,990 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:13:50,890 WARN L228 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:13:52,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:54,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:56,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:59,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:14:01,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:14:02,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:14:04,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:16:16,952 WARN L228 SmtUtils]: Spent 2.16m on a formula simplification. DAG size of input: 172 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:16:48,583 WARN L228 SmtUtils]: Spent 31.14s on a formula simplification. DAG size of input: 195 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:16:50,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:16:57,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:13,522 WARN L228 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 181 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:18:31,218 WARN L228 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 85 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:18:38,124 WARN L228 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 84 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:18:42,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:50,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:52,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:54,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:18:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:18:54,653 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-02-14 23:18:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-14 23:18:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-02-14 23:18:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:18:54,655 INFO L225 Difference]: With dead ends: 201 [2022-02-14 23:18:54,655 INFO L226 Difference]: Without dead ends: 185 [2022-02-14 23:18:54,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 184 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 360.3s TimeCoverageRelationStatistics Valid=282, Invalid=1355, Unknown=3, NotChecked=0, Total=1640 [2022-02-14 23:18:54,656 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 114 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 323 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:18:54,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 574 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 985 Invalid, 10 Unknown, 0 Unchecked, 35.2s Time] [2022-02-14 23:18:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-14 23:18:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2022-02-14 23:18:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 105 states have internal predecessors, (109), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 40 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-14 23:18:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 205 transitions. [2022-02-14 23:18:54,663 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 205 transitions. Word has length 105 [2022-02-14 23:18:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:18:54,664 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 205 transitions. [2022-02-14 23:18:54,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-14 23:18:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 205 transitions. [2022-02-14 23:18:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-14 23:18:54,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:18:54,665 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:18:54,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 23:18:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 23:18:54,875 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:18:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:18:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-02-14 23:18:54,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:18:54,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192152488] [2022-02-14 23:18:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:18:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:18:54,892 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:18:54,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118180935] [2022-02-14 23:18:54,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:18:54,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:18:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:18:54,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:18:54,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 23:18:55,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:18:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:18:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-14 23:18:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:18:55,917 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:18:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-02-14 23:18:56,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:18:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-02-14 23:18:57,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:18:57,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192152488] [2022-02-14 23:18:57,102 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:18:57,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118180935] [2022-02-14 23:18:57,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118180935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:18:57,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:18:57,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-02-14 23:18:57,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514507815] [2022-02-14 23:18:57,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:18:57,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 23:18:57,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:18:57,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 23:18:57,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-14 23:18:57,104 INFO L87 Difference]: Start difference. First operand 165 states and 205 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:18:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:18:58,076 INFO L93 Difference]: Finished difference Result 191 states and 229 transitions. [2022-02-14 23:18:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 23:18:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-02-14 23:18:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:18:58,077 INFO L225 Difference]: With dead ends: 191 [2022-02-14 23:18:58,077 INFO L226 Difference]: Without dead ends: 163 [2022-02-14 23:18:58,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-14 23:18:58,078 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-14 23:18:58,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 197 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-14 23:18:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-14 23:18:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 146. [2022-02-14 23:18:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 94 states have internal predecessors, (97), 38 states have call successors, (38), 20 states have call predecessors, (38), 19 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-14 23:18:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2022-02-14 23:18:58,085 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 116 [2022-02-14 23:18:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:18:58,085 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2022-02-14 23:18:58,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-14 23:18:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2022-02-14 23:18:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-14 23:18:58,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:18:58,087 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:18:58,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 23:18:58,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 23:18:58,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:18:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:18:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash -715358301, now seen corresponding path program 4 times [2022-02-14 23:18:58,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:18:58,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293316732] [2022-02-14 23:18:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:18:58,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:18:58,309 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:18:58,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193863652] [2022-02-14 23:18:58,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:18:58,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:18:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:18:58,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:18:58,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 23:18:58,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:18:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:18:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2022-02-14 23:18:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:18:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-02-14 23:18:59,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:19:20,737 WARN L228 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:19:55,967 WARN L228 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:21:09,840 WARN L228 SmtUtils]: Spent 28.99s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)