/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/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:59:32,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:59:32,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:59:32,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 19:59:32,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:59:32,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:59:32,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:59:32,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:59:32,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:59:32,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:59:32,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:59:32,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:59:32,112 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:59:32,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:59:32,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:59:32,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:59:32,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:59:32,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:59:32,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:59:32,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:59:32,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:59:32,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:59:32,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:59:32,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:59:32,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:59:32,137 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:59:32,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:59:32,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:59:32,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:59:32,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:59:32,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:59:32,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:59:32,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:59:32,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:59:32,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:59:32,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:59:32,147 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:59:32,147 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:59:32,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:59:32,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:59:32,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:59:32,440 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:59:32,443 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:59:32,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-18 19:59:32,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc40353f/8607f2b40bd44dbdbf7d5897e84c4586/FLAG0570eabc3 [2022-03-18 19:59:32,913 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:59:32,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-03-18 19:59:32,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc40353f/8607f2b40bd44dbdbf7d5897e84c4586/FLAG0570eabc3 [2022-03-18 19:59:32,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc40353f/8607f2b40bd44dbdbf7d5897e84c4586 [2022-03-18 19:59:32,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:59:32,953 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:59:32,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:59:32,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:59:32,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:59:32,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:59:32" (1/1) ... [2022-03-18 19:59:32,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8bb2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:32, skipping insertion in model container [2022-03-18 19:59:32,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:59:32" (1/1) ... [2022-03-18 19:59:32,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:59:32,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:59:33,126 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/hard2_valuebound50.c[526,539] [2022-03-18 19:59:33,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:59:33,159 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:59:33,173 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/hard2_valuebound50.c[526,539] [2022-03-18 19:59:33,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:59:33,203 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:59:33,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33 WrapperNode [2022-03-18 19:59:33,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:59:33,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:59:33,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:59:33,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:59:33,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:59:33,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:59:33,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:59:33,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:59:33,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:59:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:33,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 19:59:33,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 19:59:33,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:59:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:59:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:59:33,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:59:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:59:33,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:59:33,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:59:33,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:59:33,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:59:33,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:59:33,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 19:59:33,339 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:59:33,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:59:33,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:59:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:59:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:59:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:59:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:59:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:59:33,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:59:33,402 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:59:33,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:59:33,560 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:59:33,565 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:59:33,566 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:59:33,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:59:33 BoogieIcfgContainer [2022-03-18 19:59:33,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:59:33,577 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:59:33,577 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:59:33,584 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:59:33,587 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:59:33" (1/1) ... [2022-03-18 19:59:33,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:59:33 BasicIcfg [2022-03-18 19:59:33,629 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:59:33,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:59:33,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:59:33,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:59:33,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:59:32" (1/4) ... [2022-03-18 19:59:33,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178f4264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:59:33, skipping insertion in model container [2022-03-18 19:59:33,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:59:33" (2/4) ... [2022-03-18 19:59:33,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178f4264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:59:33, skipping insertion in model container [2022-03-18 19:59:33,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:59:33" (3/4) ... [2022-03-18 19:59:33,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178f4264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:59:33, skipping insertion in model container [2022-03-18 19:59:33,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:59:33" (4/4) ... [2022-03-18 19:59:33,649 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.cJordan [2022-03-18 19:59:33,654 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:59:33,654 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:59:33,705 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:59:33,712 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 19:59:33,712 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:59:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:59:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 19:59:33,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:33,741 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:33,742 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:33,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-18 19:59:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416840924] [2022-03-18 19:59:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:59:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:33,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:59:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:59:33,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:33,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416840924] [2022-03-18 19:59:33,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416840924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:33,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:33,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:59:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564753321] [2022-03-18 19:59:33,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:33,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:59:33,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:59:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:59:34,031 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:59:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:34,128 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-18 19:59:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:59:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 19:59:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:34,140 INFO L225 Difference]: With dead ends: 35 [2022-03-18 19:59:34,141 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 19:59:34,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:59:34,147 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:34,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:59:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 19:59:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 19:59:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:59:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-18 19:59:34,196 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-18 19:59:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:34,197 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-18 19:59:34,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:59:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-18 19:59:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 19:59:34,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:34,200 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:34,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:59:34,201 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-18 19:59:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:34,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319416613] [2022-03-18 19:59:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:34,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:59:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:59:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:59:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:34,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319416613] [2022-03-18 19:59:34,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319416613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:34,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:34,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:59:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303379948] [2022-03-18 19:59:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:34,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:59:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:59:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:59:34,326 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:59:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:34,488 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-18 19:59:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:59:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 19:59:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:34,490 INFO L225 Difference]: With dead ends: 41 [2022-03-18 19:59:34,490 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 19:59:34,490 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:59:34,491 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:34,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:59:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 19:59:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-18 19:59:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:59:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-18 19:59:34,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-18 19:59:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:34,501 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-18 19:59:34,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:59:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-18 19:59:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 19:59:34,502 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:34,502 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:34,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 19:59:34,503 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-18 19:59:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:34,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810860660] [2022-03-18 19:59:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:59:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:59:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 19:59:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:59:34,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810860660] [2022-03-18 19:59:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810860660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:34,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:34,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:59:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829884838] [2022-03-18 19:59:34,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:34,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:59:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:59:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:59:34,600 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:59:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:34,774 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-18 19:59:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:59:34,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 19:59:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:34,776 INFO L225 Difference]: With dead ends: 45 [2022-03-18 19:59:34,776 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 19:59:34,776 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:59:34,777 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:34,778 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:59:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 19:59:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-18 19:59:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:59:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-18 19:59:34,785 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-18 19:59:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:34,786 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-18 19:59:34,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:59:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-18 19:59:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 19:59:34,787 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:34,787 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:34,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 19:59:34,788 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-18 19:59:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:34,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127789838] [2022-03-18 19:59:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:34,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:34,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25035304] [2022-03-18 19:59:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:34,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:34,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:34,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:34,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 19:59:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:34,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:59:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:59:35,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:59:35,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:35,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127789838] [2022-03-18 19:59:35,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:35,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25035304] [2022-03-18 19:59:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25035304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:35,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:35,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:59:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108374700] [2022-03-18 19:59:35,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:35,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:59:35,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:59:35,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:59:35,075 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:59:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:35,121 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-03-18 19:59:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:59:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 19:59:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:35,122 INFO L225 Difference]: With dead ends: 53 [2022-03-18 19:59:35,122 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 19:59:35,123 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:59:35,124 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:35,124 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:59:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 19:59:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-18 19:59:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 19:59:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-18 19:59:35,132 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-18 19:59:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:35,132 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-18 19:59:35,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:59:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-18 19:59:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 19:59:35,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:35,134 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:35,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 19:59:35,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:35,348 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-18 19:59:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626862568] [2022-03-18 19:59:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:35,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:35,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718010986] [2022-03-18 19:59:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:35,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:35,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 19:59:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:59:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:59:35,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:59:35,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626862568] [2022-03-18 19:59:35,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718010986] [2022-03-18 19:59:35,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718010986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:35,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:35,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:59:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465512074] [2022-03-18 19:59:35,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:35,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:59:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:59:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:59:35,545 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:59:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:35,588 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-18 19:59:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:59:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 19:59:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:35,590 INFO L225 Difference]: With dead ends: 63 [2022-03-18 19:59:35,590 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 19:59:35,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:59:35,591 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:35,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:59:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 19:59:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-18 19:59:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 19:59:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-18 19:59:35,598 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-18 19:59:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:35,598 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-18 19:59:35,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:59:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-18 19:59:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 19:59:35,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:35,612 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:35,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 19:59:35,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:35,813 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:35,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-18 19:59:35,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587256172] [2022-03-18 19:59:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:35,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:35,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:35,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297713875] [2022-03-18 19:59:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:35,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:35,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:35,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 19:59:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:59:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 19:59:36,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:59:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 19:59:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587256172] [2022-03-18 19:59:36,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297713875] [2022-03-18 19:59:36,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297713875] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:59:36,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:59:36,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 19:59:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34828549] [2022-03-18 19:59:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:36,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:59:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:59:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 19:59:36,235 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:59:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:36,290 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-03-18 19:59:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:59:36,290 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-18 19:59:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:36,292 INFO L225 Difference]: With dead ends: 67 [2022-03-18 19:59:36,292 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 19:59:36,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:59:36,294 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:36,294 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:59:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 19:59:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-18 19:59:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 19:59:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-18 19:59:36,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-18 19:59:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:36,310 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-18 19:59:36,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:59:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-18 19:59:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 19:59:36,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:36,312 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:36,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 19:59:36,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:36,513 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-03-18 19:59:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061256215] [2022-03-18 19:59:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:36,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:36,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362556545] [2022-03-18 19:59:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:36,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:36,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 19:59:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 19:59:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 19:59:36,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:59:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 19:59:38,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061256215] [2022-03-18 19:59:38,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362556545] [2022-03-18 19:59:38,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362556545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:59:38,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:59:38,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 19:59:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571289704] [2022-03-18 19:59:38,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:59:38,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:59:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:59:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:59:38,048 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 19:59:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:40,173 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2022-03-18 19:59:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:59:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 64 [2022-03-18 19:59:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:40,176 INFO L225 Difference]: With dead ends: 131 [2022-03-18 19:59:40,176 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 19:59:40,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:59:40,178 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:40,178 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 299 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 19:59:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 19:59:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-03-18 19:59:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 19:59:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-03-18 19:59:40,195 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 64 [2022-03-18 19:59:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:40,196 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-03-18 19:59:40,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-18 19:59:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-03-18 19:59:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 19:59:40,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:40,198 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:40,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 19:59:40,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:40,404 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-03-18 19:59:40,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:40,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262386152] [2022-03-18 19:59:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:40,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:40,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204323] [2022-03-18 19:59:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:40,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:40,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:40,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 19:59:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 19:59:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 19:59:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:59:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-18 19:59:41,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:41,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262386152] [2022-03-18 19:59:41,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:41,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204323] [2022-03-18 19:59:41,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:59:41,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:59:41,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 19:59:41,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670367760] [2022-03-18 19:59:41,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:59:41,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 19:59:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 19:59:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 19:59:41,238 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 19:59:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:41,537 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2022-03-18 19:59:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 19:59:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 75 [2022-03-18 19:59:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:41,540 INFO L225 Difference]: With dead ends: 134 [2022-03-18 19:59:41,540 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 19:59:41,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-18 19:59:41,541 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:41,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 181 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 19:59:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 19:59:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-03-18 19:59:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:59:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-03-18 19:59:41,550 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 75 [2022-03-18 19:59:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:41,550 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-03-18 19:59:41,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 19:59:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-03-18 19:59:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 19:59:41,552 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:41,552 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:41,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:59:41,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:41,772 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1480109990, now seen corresponding path program 1 times [2022-03-18 19:59:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:41,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704230407] [2022-03-18 19:59:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:41,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:41,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970768683] [2022-03-18 19:59:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:41,785 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:41,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 19:59:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:59:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 19:59:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-18 19:59:42,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:59:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:59:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704230407] [2022-03-18 19:59:42,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:59:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970768683] [2022-03-18 19:59:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970768683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:59:42,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:59:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:59:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42511529] [2022-03-18 19:59:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:59:42,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:59:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:59:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:59:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:59:42,043 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:59:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:59:42,084 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2022-03-18 19:59:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:59:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2022-03-18 19:59:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:59:42,086 INFO L225 Difference]: With dead ends: 103 [2022-03-18 19:59:42,086 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 19:59:42,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:59:42,087 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:59:42,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:59:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 19:59:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 19:59:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:59:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-03-18 19:59:42,094 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 84 [2022-03-18 19:59:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:59:42,094 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-03-18 19:59:42,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:59:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-03-18 19:59:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 19:59:42,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:59:42,096 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:59:42,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 19:59:42,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:42,322 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:59:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:59:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-03-18 19:59:42,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:59:42,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994886557] [2022-03-18 19:59:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:59:42,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:59:42,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:59:42,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75160927] [2022-03-18 19:59:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:59:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:59:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:59:42,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:59:42,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 19:59:42,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:59:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:59:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 19:59:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:59:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:59:42,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:00:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 20:00:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:00:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994886557] [2022-03-18 20:00:08,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:00:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75160927] [2022-03-18 20:00:08,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75160927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:00:08,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:00:08,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 20:00:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828520096] [2022-03-18 20:00:08,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:00:08,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 20:00:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:00:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 20:00:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=178, Unknown=2, NotChecked=0, Total=240 [2022-03-18 20:00:08,766 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-18 20:00:16,762 WARN L232 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 20:00:24,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 20:00:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:00:24,024 INFO L93 Difference]: Finished difference Result 193 states and 258 transitions. [2022-03-18 20:00:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 20:00:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-03-18 20:00:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:00:24,027 INFO L225 Difference]: With dead ends: 193 [2022-03-18 20:00:24,027 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 20:00:24,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=114, Invalid=304, Unknown=2, NotChecked=0, Total=420 [2022-03-18 20:00:24,029 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 90 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:00:24,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 599 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-18 20:00:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 20:00:24,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 166. [2022-03-18 20:00:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-18 20:00:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2022-03-18 20:00:24,049 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 94 [2022-03-18 20:00:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:00:24,051 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2022-03-18 20:00:24,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-18 20:00:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2022-03-18 20:00:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 20:00:24,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:00:24,060 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:00:24,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 20:00:24,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:24,287 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:00:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:00:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 411415430, now seen corresponding path program 1 times [2022-03-18 20:00:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:00:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019383322] [2022-03-18 20:00:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:00:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:00:24,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:00:24,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055370626] [2022-03-18 20:00:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:00:24,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:00:24,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:00:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 20:00:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:00:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 20:00:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:00:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 20:00:24,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:00:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 20:00:25,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:00:25,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019383322] [2022-03-18 20:00:25,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:00:25,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055370626] [2022-03-18 20:00:25,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055370626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:00:25,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:00:25,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 20:00:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145659550] [2022-03-18 20:00:25,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:00:25,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:00:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:00:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:00:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:00:25,559 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-18 20:00:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:00:25,797 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2022-03-18 20:00:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 20:00:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 110 [2022-03-18 20:00:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:00:25,799 INFO L225 Difference]: With dead ends: 180 [2022-03-18 20:00:25,799 INFO L226 Difference]: Without dead ends: 174 [2022-03-18 20:00:25,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-18 20:00:25,800 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:00:25,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 391 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 20:00:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-18 20:00:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-18 20:00:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 108 states have internal predecessors, (125), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 20:00:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-03-18 20:00:25,810 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 110 [2022-03-18 20:00:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:00:25,810 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-03-18 20:00:25,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-18 20:00:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-03-18 20:00:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 20:00:25,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:00:25,813 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:00:25,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 20:00:26,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 20:00:26,028 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:00:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:00:26,028 INFO L85 PathProgramCache]: Analyzing trace with hash 564418017, now seen corresponding path program 2 times [2022-03-18 20:00:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:00:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666090277] [2022-03-18 20:00:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:00:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:00:26,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:00:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519901791] [2022-03-18 20:00:26,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:00:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:00:26,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:00:26,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 20:00:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:00:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:00:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:00:26,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:00:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-18 20:00:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:00:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-18 20:00:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:00:26,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666090277] [2022-03-18 20:00:26,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:00:26,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519901791] [2022-03-18 20:00:26,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519901791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:00:26,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:00:26,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 20:00:26,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931871260] [2022-03-18 20:00:26,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:00:26,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 20:00:26,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:00:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 20:00:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 20:00:26,802 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-18 20:00:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:00:26,879 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2022-03-18 20:00:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:00:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 123 [2022-03-18 20:00:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:00:26,882 INFO L225 Difference]: With dead ends: 159 [2022-03-18 20:00:26,882 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 20:00:26,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 20:00:26,883 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:00:26,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 204 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:00:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 20:00:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-18 20:00:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 20:00:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 167 transitions. [2022-03-18 20:00:26,905 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 167 transitions. Word has length 123 [2022-03-18 20:00:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:00:26,906 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 167 transitions. [2022-03-18 20:00:26,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-18 20:00:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 167 transitions. [2022-03-18 20:00:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 20:00:26,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:00:26,909 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:00:26,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 20:00:27,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:27,138 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:00:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:00:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1567600662, now seen corresponding path program 3 times [2022-03-18 20:00:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:00:27,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224149824] [2022-03-18 20:00:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:00:27,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:00:27,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:00:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979381309] [2022-03-18 20:00:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:00:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:00:27,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:00:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 20:00:27,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:00:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:00:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 20:00:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:00:27,526 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:00:27,600 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:00:27,713 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 20:00:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-18 20:00:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:00:39,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:00:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224149824] [2022-03-18 20:00:39,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:00:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979381309] [2022-03-18 20:00:39,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979381309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:00:39,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:00:39,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 20:00:39,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532166518] [2022-03-18 20:00:39,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:00:39,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 20:00:39,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:00:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 20:00:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:00:39,810 INFO L87 Difference]: Start difference. First operand 136 states and 167 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 20:00:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:00:39,906 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2022-03-18 20:00:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 20:00:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2022-03-18 20:00:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:00:39,908 INFO L225 Difference]: With dead ends: 140 [2022-03-18 20:00:39,908 INFO L226 Difference]: Without dead ends: 138 [2022-03-18 20:00:39,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:00:39,909 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:00:39,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 120 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:00:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-18 20:00:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-03-18 20:00:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 20:00:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2022-03-18 20:00:39,919 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 124 [2022-03-18 20:00:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:00:39,919 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2022-03-18 20:00:39,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 20:00:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2022-03-18 20:00:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 20:00:39,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:00:39,922 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:00:39,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 20:00:40,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 20:00:40,144 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:00:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:00:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1333998901, now seen corresponding path program 3 times [2022-03-18 20:00:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:00:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539412930] [2022-03-18 20:00:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:00:40,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:00:40,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:00:40,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774066524] [2022-03-18 20:00:40,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:00:40,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:00:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:00:40,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:00:40,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 20:00:40,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:00:40,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:00:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:00:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:00:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-18 20:00:40,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:00:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-18 20:00:40,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:00:40,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539412930] [2022-03-18 20:00:40,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:00:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774066524] [2022-03-18 20:00:40,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774066524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 20:00:40,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 20:00:40,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 20:00:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516714981] [2022-03-18 20:00:40,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 20:00:40,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 20:00:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:00:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 20:00:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:00:40,666 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-18 20:00:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:00:40,776 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2022-03-18 20:00:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 20:00:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 127 [2022-03-18 20:00:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:00:40,779 INFO L225 Difference]: With dead ends: 124 [2022-03-18 20:00:40,779 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 20:00:40,779 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:00:40,780 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:00:40,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:00:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 20:00:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 20:00:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 20:00:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 20:00:40,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2022-03-18 20:00:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:00:40,820 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 20:00:40,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-18 20:00:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 20:00:40,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 20:00:40,823 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 20:00:40,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 20:00:41,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 20:00:41,034 INFO L718 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:00:41,035 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 20:00:41,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:00:41 BasicIcfg [2022-03-18 20:00:41,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 20:00:41,038 INFO L158 Benchmark]: Toolchain (without parser) took 68085.10ms. Allocated memory was 191.9MB in the beginning and 343.9MB in the end (delta: 152.0MB). Free memory was 165.0MB in the beginning and 311.6MB in the end (delta: -146.6MB). Peak memory consumption was 5.6MB. Max. memory is 8.0GB. [2022-03-18 20:00:41,038 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 191.9MB. Free memory is still 149.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:00:41,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.08ms. Allocated memory was 191.9MB in the beginning and 286.3MB in the end (delta: 94.4MB). Free memory was 165.0MB in the beginning and 257.0MB in the end (delta: -92.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-18 20:00:41,039 INFO L158 Benchmark]: Boogie Preprocessor took 43.37ms. Allocated memory is still 286.3MB. Free memory was 257.0MB in the beginning and 255.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:00:41,040 INFO L158 Benchmark]: RCFGBuilder took 324.62ms. Allocated memory is still 286.3MB. Free memory was 255.5MB in the beginning and 244.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 20:00:41,040 INFO L158 Benchmark]: IcfgTransformer took 52.85ms. Allocated memory is still 286.3MB. Free memory was 244.5MB in the beginning and 243.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 20:00:41,040 INFO L158 Benchmark]: TraceAbstraction took 67406.68ms. Allocated memory was 286.3MB in the beginning and 343.9MB in the end (delta: 57.7MB). Free memory was 242.9MB in the beginning and 311.6MB in the end (delta: -68.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 20:00:41,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 191.9MB. Free memory is still 149.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 248.08ms. Allocated memory was 191.9MB in the beginning and 286.3MB in the end (delta: 94.4MB). Free memory was 165.0MB in the beginning and 257.0MB in the end (delta: -92.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.37ms. Allocated memory is still 286.3MB. Free memory was 257.0MB in the beginning and 255.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 324.62ms. Allocated memory is still 286.3MB. Free memory was 255.5MB in the beginning and 244.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 52.85ms. Allocated memory is still 286.3MB. Free memory was 244.5MB in the beginning and 243.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 67406.68ms. Allocated memory was 286.3MB in the beginning and 343.9MB in the end (delta: 57.7MB). Free memory was 242.9MB in the beginning and 311.6MB in the end (delta: -68.7MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 67.3s, OverallIterations: 14, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 410 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 2533 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1965 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1809 IncrementalHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 568 mSDtfsCounter, 1809 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1452 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 19.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 44.5s InterpolantComputationTime, 962 NumberOfCodeBlocks, 840 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1578 ConstructedInterpolants, 0 QuantifiedInterpolants, 16044 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1954 ConjunctsInSsa, 198 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 6338/6540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 20:00:41,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...