/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/divbin_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:53:52,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:53:52,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:53:52,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 17:53:52,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:53:52,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:53:52,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:53:52,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:53:52,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:53:52,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:53:52,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:53:52,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:53:52,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:53:52,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:53:52,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:53:52,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:53:52,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 17:53:52,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:53:52,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:53:52,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:53:52,182 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:53:52,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:53:52,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:53:52,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:53:52,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:53:52,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:53:52,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:53:52,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:53:52,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:53:52,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:53:52,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:53:52,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:53:52,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:53:52,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:53:52,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:53:52,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:53:52,194 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:53:52,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:53:52,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:53:52,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:53:52,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:53:52,382 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:53:52,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2022-02-23 17:53:52,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b2170f8/661b9984b4e54d9692c5fbf6f7edc1fe/FLAGc0a3a0eaa [2022-02-23 17:53:52,766 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:53:52,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2022-02-23 17:53:52,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b2170f8/661b9984b4e54d9692c5fbf6f7edc1fe/FLAGc0a3a0eaa [2022-02-23 17:53:52,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b2170f8/661b9984b4e54d9692c5fbf6f7edc1fe [2022-02-23 17:53:52,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:53:52,783 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:53:52,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:53:52,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:53:52,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:53:52,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:52" (1/1) ... [2022-02-23 17:53:52,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118d4dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:52, skipping insertion in model container [2022-02-23 17:53:52,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:52" (1/1) ... [2022-02-23 17:53:52,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:53:52,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:53:52,932 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/divbin_unwindbound50.i[950,963] [2022-02-23 17:53:52,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:53:52,976 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:53:52,987 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/divbin_unwindbound50.i[950,963] [2022-02-23 17:53:53,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:53:53,013 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:53:53,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53 WrapperNode [2022-02-23 17:53:53,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:53:53,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:53:53,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:53:53,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:53:53,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:53:53,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:53:53,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:53:53,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:53:53,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:53:53,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:53,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 17:53:53,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 17:53:53,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:53:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:53:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:53:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:53:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:53:53,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 17:53:53,117 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:53:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:53:53,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:53:53,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:53:53,183 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:53:53,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:53:53,274 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:53:53,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:53:53,279 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 17:53:53,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:53 BoogieIcfgContainer [2022-02-23 17:53:53,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:53:53,281 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:53:53,281 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:53:53,282 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:53:53,286 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:53" (1/1) ... [2022-02-23 17:53:53,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:53:53 BasicIcfg [2022-02-23 17:53:53,310 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:53:53,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:53:53,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:53:53,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:53:53,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:53:52" (1/4) ... [2022-02-23 17:53:53,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112e639e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:53, skipping insertion in model container [2022-02-23 17:53:53,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:53" (2/4) ... [2022-02-23 17:53:53,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112e639e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:53, skipping insertion in model container [2022-02-23 17:53:53,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:53" (3/4) ... [2022-02-23 17:53:53,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112e639e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:53:53, skipping insertion in model container [2022-02-23 17:53:53,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:53:53" (4/4) ... [2022-02-23 17:53:53,332 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.iJordan [2022-02-23 17:53:53,336 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:53:53,336 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:53:53,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:53:53,382 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 17:53:53,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:53:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 17:53:53,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:53:53,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:53,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:53,403 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2022-02-23 17:53:53,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:53,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121119686] [2022-02-23 17:53:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:53,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:53:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:53,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:53:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 17:53:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:53,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:53,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121119686] [2022-02-23 17:53:53,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121119686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:53:53,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:53:53,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:53:53,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130856590] [2022-02-23 17:53:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:53:53,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:53:53,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:53:53,647 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:53,719 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-02-23 17:53:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:53:53,722 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 17:53:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:53,735 INFO L225 Difference]: With dead ends: 34 [2022-02-23 17:53:53,735 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 17:53:53,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:53:53,740 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:53,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 17:53:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-23 17:53:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 17:53:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-02-23 17:53:53,764 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-02-23 17:53:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:53,764 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-02-23 17:53:53,764 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-02-23 17:53:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 17:53:53,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:53,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:53,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:53:53,766 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2022-02-23 17:53:53,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:53,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657780646] [2022-02-23 17:53:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:53,780 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:53,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635261626] [2022-02-23 17:53:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:53,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:53:53,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 17:53:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 17:53:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:53,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:53:53,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:53,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657780646] [2022-02-23 17:53:53,950 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:53,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635261626] [2022-02-23 17:53:53,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635261626] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:53:53,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:53:53,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 17:53:53,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156897006] [2022-02-23 17:53:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:53,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 17:53:53,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 17:53:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 17:53:53,956 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:53,972 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-02-23 17:53:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 17:53:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-02-23 17:53:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:53,978 INFO L225 Difference]: With dead ends: 30 [2022-02-23 17:53:53,979 INFO L226 Difference]: Without dead ends: 30 [2022-02-23 17:53:53,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 17:53:53,980 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:53,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-23 17:53:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-23 17:53:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 17:53:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-02-23 17:53:53,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-02-23 17:53:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-02-23 17:53:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-02-23 17:53:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 17:53:53,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:53,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:54,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:54,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:54,187 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2022-02-23 17:53:54,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:54,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186486608] [2022-02-23 17:53:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:54,227 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:54,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449470458] [2022-02-23 17:53:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:54,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:54,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:53:54,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 17:53:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:53:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:54,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:53:54,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:54,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186486608] [2022-02-23 17:53:54,357 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:54,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449470458] [2022-02-23 17:53:54,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449470458] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:53:54,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:53:54,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:53:54,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821157728] [2022-02-23 17:53:54,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:54,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:53:54,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:53:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:53:54,359 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:54,385 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-02-23 17:53:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:53:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-02-23 17:53:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:54,387 INFO L225 Difference]: With dead ends: 34 [2022-02-23 17:53:54,387 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 17:53:54,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:53:54,388 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:54,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 17:53:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-23 17:53:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 17:53:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-23 17:53:54,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-02-23 17:53:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:54,392 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-23 17:53:54,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:53:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-23 17:53:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 17:53:54,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:54,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:54,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:54,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 17:53:54,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2022-02-23 17:53:54,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:54,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651925187] [2022-02-23 17:53:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:54,607 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:54,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804094383] [2022-02-23 17:53:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:54,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:54,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:54,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:53:54,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 17:53:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:54,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 17:53:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 17:53:54,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:53:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:55,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:55,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651925187] [2022-02-23 17:53:55,214 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:55,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804094383] [2022-02-23 17:53:55,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804094383] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 17:53:55,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:53:55,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 17:53:55,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112801162] [2022-02-23 17:53:55,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:55,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:53:55,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:53:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:53:55,216 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:53:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:55,379 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-02-23 17:53:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:53:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-02-23 17:53:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:55,380 INFO L225 Difference]: With dead ends: 40 [2022-02-23 17:53:55,380 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 17:53:55,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-23 17:53:55,381 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:55,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:53:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 17:53:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-23 17:53:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 17:53:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-02-23 17:53:55,385 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-02-23 17:53:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-02-23 17:53:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:53:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-02-23 17:53:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 17:53:55,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:55,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:55,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:55,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:55,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2022-02-23 17:53:55,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:55,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649743563] [2022-02-23 17:53:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:55,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:55,614 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:55,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291822764] [2022-02-23 17:53:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:55,624 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:53:55,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 17:53:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:53:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:55,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:53:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:55,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649743563] [2022-02-23 17:53:55,799 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291822764] [2022-02-23 17:53:55,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291822764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:53:55,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:53:55,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 17:53:55,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310900135] [2022-02-23 17:53:55,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:53:55,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:53:55,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:53:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:53:55,801 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:53:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:55,863 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-02-23 17:53:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 17:53:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-02-23 17:53:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:55,864 INFO L225 Difference]: With dead ends: 61 [2022-02-23 17:53:55,864 INFO L226 Difference]: Without dead ends: 61 [2022-02-23 17:53:55,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:53:55,865 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:55,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-23 17:53:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-02-23 17:53:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 17:53:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-02-23 17:53:55,869 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-02-23 17:53:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:55,869 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-02-23 17:53:55,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:53:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-02-23 17:53:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 17:53:55,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:55,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:55,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:56,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:56,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2022-02-23 17:53:56,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:56,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171507674] [2022-02-23 17:53:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:56,094 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:56,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493369802] [2022-02-23 17:53:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:56,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:56,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:53:56,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 17:53:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:53:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:56,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:53:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:56,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171507674] [2022-02-23 17:53:56,263 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:56,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493369802] [2022-02-23 17:53:56,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493369802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:53:56,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:53:56,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 17:53:56,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094127085] [2022-02-23 17:53:56,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:53:56,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 17:53:56,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 17:53:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:53:56,264 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:53:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:56,347 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-02-23 17:53:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 17:53:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-02-23 17:53:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:56,352 INFO L225 Difference]: With dead ends: 91 [2022-02-23 17:53:56,352 INFO L226 Difference]: Without dead ends: 91 [2022-02-23 17:53:56,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:53:56,353 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 185 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-23 17:53:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-02-23 17:53:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 17:53:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-02-23 17:53:56,369 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2022-02-23 17:53:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:56,369 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-02-23 17:53:56,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:53:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-02-23 17:53:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 17:53:56,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:56,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:56,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:56,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:56,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2022-02-23 17:53:56,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:56,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501418166] [2022-02-23 17:53:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:56,586 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:56,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380088165] [2022-02-23 17:53:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:56,592 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) [2022-02-23 17:53:56,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 17:53:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 17:53:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 17:53:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:53:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:56,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:56,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501418166] [2022-02-23 17:53:56,977 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:56,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380088165] [2022-02-23 17:53:56,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380088165] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 17:53:56,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:53:56,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 17:53:56,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705874513] [2022-02-23 17:53:56,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:56,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:53:56,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:53:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:53:56,979 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:53:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:56,998 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2022-02-23 17:53:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:53:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-02-23 17:53:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:57,006 INFO L225 Difference]: With dead ends: 115 [2022-02-23 17:53:57,006 INFO L226 Difference]: Without dead ends: 115 [2022-02-23 17:53:57,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-23 17:53:57,007 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:57,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-02-23 17:53:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-23 17:53:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-02-23 17:53:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 17:53:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-02-23 17:53:57,013 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 29 [2022-02-23 17:53:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-02-23 17:53:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:53:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-02-23 17:53:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 17:53:57,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:57,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:53:57,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 17:53:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:57,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -665062919, now seen corresponding path program 1 times [2022-02-23 17:53:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444448099] [2022-02-23 17:53:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:57,236 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:57,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213489015] [2022-02-23 17:53:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:57,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:57,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:57,238 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) [2022-02-23 17:53:57,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 17:53:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 17:53:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:53:57,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:53:57,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:57,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444448099] [2022-02-23 17:53:57,314 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:57,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213489015] [2022-02-23 17:53:57,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213489015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:53:57,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:53:57,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:53:57,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017752966] [2022-02-23 17:53:57,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:53:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:53:57,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:53:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:53:57,315 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 17:53:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:53:57,325 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-02-23 17:53:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:53:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-02-23 17:53:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:53:57,326 INFO L225 Difference]: With dead ends: 110 [2022-02-23 17:53:57,326 INFO L226 Difference]: Without dead ends: 100 [2022-02-23 17:53:57,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:53:57,327 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:53:57,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:53:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-23 17:53:57,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-23 17:53:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 17:53:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-02-23 17:53:57,347 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 35 [2022-02-23 17:53:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:53:57,348 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-02-23 17:53:57,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 17:53:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-02-23 17:53:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 17:53:57,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:53:57,349 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 17:53:57,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 17:53:57,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:57,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:53:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:53:57,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1800746756, now seen corresponding path program 1 times [2022-02-23 17:53:57,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:53:57,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289921497] [2022-02-23 17:53:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:57,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:53:57,566 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:53:57,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361897220] [2022-02-23 17:53:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:53:57,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:53:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:53:57,568 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) [2022-02-23 17:53:57,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 17:53:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:53:57,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 17:53:57,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:53:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 17:53:57,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:53:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 17:53:57,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:53:57,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289921497] [2022-02-23 17:53:57,766 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:53:57,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361897220] [2022-02-23 17:53:57,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361897220] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:53:57,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:53:57,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-02-23 17:53:57,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298567149] [2022-02-23 17:53:57,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:53:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 17:53:57,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:53:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 17:53:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:53:57,773 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 17:53:59,836 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 [] [2022-02-23 17:54:01,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:54:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:54:02,140 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2022-02-23 17:54:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:54:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-02-23 17:54:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:54:02,141 INFO L225 Difference]: With dead ends: 113 [2022-02-23 17:54:02,141 INFO L226 Difference]: Without dead ends: 95 [2022-02-23 17:54:02,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:54:02,142 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-23 17:54:02,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-02-23 17:54:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-23 17:54:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-23 17:54:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 17:54:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-02-23 17:54:02,146 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2022-02-23 17:54:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:54:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-02-23 17:54:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 17:54:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-02-23 17:54:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 17:54:02,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:54:02,147 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 17:54:02,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 17:54:02,348 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,SelfDestructingSolverStorable8 [2022-02-23 17:54:02,348 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:54:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:54:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2022-02-23 17:54:02,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:54:02,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747598863] [2022-02-23 17:54:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:54:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:54:02,358 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:54:02,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227509417] [2022-02-23 17:54:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:54:02,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:54:02,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:54:02,361 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) [2022-02-23 17:54:02,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process