/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:33:22,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:33:22,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:33:22,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 02:33:22,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:33:22,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:33:22,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:33:22,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:33:22,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:33:22,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:33:22,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:33:22,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:33:22,977 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:33:22,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:33:22,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:33:22,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:33:22,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:33:22,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 02:33:22,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:33:22,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:33:23,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:33:23,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:33:23,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:33:23,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:33:23,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:33:23,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:33:23,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:33:23,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:33:23,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:33:23,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:33:23,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:33:23,017 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:33:23,017 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:33:23,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:33:23,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:33:23,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:33:23,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:33:23,177 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:33:23,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-04-05 02:33:23,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55424beb3/0a6ad9935b8744058ece51aaffab5c81/FLAG8a9c1beac [2022-04-05 02:33:23,619 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:33:23,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2022-04-05 02:33:23,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55424beb3/0a6ad9935b8744058ece51aaffab5c81/FLAG8a9c1beac [2022-04-05 02:33:23,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55424beb3/0a6ad9935b8744058ece51aaffab5c81 [2022-04-05 02:33:23,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:33:23,642 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:33:23,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:33:23,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:33:23,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:33:23,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9b91be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23, skipping insertion in model container [2022-04-05 02:33:23,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:33:23,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:33:23,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-04-05 02:33:23,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:33:23,829 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:33:23,837 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2022-04-05 02:33:23,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:33:23,863 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:33:23,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23 WrapperNode [2022-04-05 02:33:23,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:33:23,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:33:23,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:33:23,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:33:23,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:33:23,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:33:23,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:33:23,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:33:23,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (1/1) ... [2022-04-05 02:33:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:33:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:23,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 02:33:23,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 02:33:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:33:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:33:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:33:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:33:23,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:33:23,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:33:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:33:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:33:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:33:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:33:23,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 02:33:23,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:33:23,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:33:23,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:33:23,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:33:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:33:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:33:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:33:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:33:23,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:33:24,006 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:33:24,008 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:33:24,139 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:33:24,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:33:24,143 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 02:33:24,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:24 BoogieIcfgContainer [2022-04-05 02:33:24,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:33:24,145 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:33:24,145 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:33:24,160 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:33:24,168 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:24" (1/1) ... [2022-04-05 02:33:24,170 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:33:24,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:33:24 BasicIcfg [2022-04-05 02:33:24,191 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:33:24,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:33:24,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:33:24,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:33:24,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:33:23" (1/4) ... [2022-04-05 02:33:24,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23833f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:33:24, skipping insertion in model container [2022-04-05 02:33:24,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:33:23" (2/4) ... [2022-04-05 02:33:24,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23833f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:33:24, skipping insertion in model container [2022-04-05 02:33:24,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:33:24" (3/4) ... [2022-04-05 02:33:24,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23833f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:33:24, skipping insertion in model container [2022-04-05 02:33:24,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:33:24" (4/4) ... [2022-04-05 02:33:24,200 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.cJordan [2022-04-05 02:33:24,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:33:24,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:33:24,237 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:33:24,243 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:33:24,244 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:33:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 02:33:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 02:33:24,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:24,258 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:24,259 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-05 02:33:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376827146] [2022-04-05 02:33:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:33:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:33:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 02:33:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 02:33:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 02:33:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:24,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376827146] [2022-04-05 02:33:24,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376827146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:24,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:24,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:33:24,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186549762] [2022-04-05 02:33:24,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:24,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:33:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:33:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:33:24,492 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:24,593 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-04-05 02:33:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:33:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-05 02:33:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:24,600 INFO L225 Difference]: With dead ends: 40 [2022-04-05 02:33:24,600 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 02:33:24,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:33:24,603 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:24,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 02:33:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 02:33:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:33:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 02:33:24,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-05 02:33:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:24,636 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 02:33:24,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 02:33:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 02:33:24,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:24,639 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:24,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:33:24,639 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-05 02:33:24,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:24,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396611691] [2022-04-05 02:33:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:24,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346467473] [2022-04-05 02:33:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:24,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:24,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:24,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:33:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:33:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:33:24,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396611691] [2022-04-05 02:33:24,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:24,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346467473] [2022-04-05 02:33:24,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346467473] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:24,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:24,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:33:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904850235] [2022-04-05 02:33:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:24,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:33:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:33:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:33:24,948 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:25,062 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 02:33:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:33:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 02:33:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:25,069 INFO L225 Difference]: With dead ends: 47 [2022-04-05 02:33:25,069 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 02:33:25,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:33:25,070 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:25,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 02:33:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-05 02:33:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:33:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-05 02:33:25,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-05 02:33:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:25,077 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-05 02:33:25,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-05 02:33:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 02:33:25,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:25,078 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:25,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:25,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:25,295 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:25,296 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-05 02:33:25,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:25,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471690675] [2022-04-05 02:33:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:25,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:25,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106320447] [2022-04-05 02:33:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:25,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:25,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:33:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 02:33:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:33:25,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:25,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471690675] [2022-04-05 02:33:25,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106320447] [2022-04-05 02:33:25,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106320447] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:33:25,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:33:25,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 02:33:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796679894] [2022-04-05 02:33:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:25,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:33:25,718 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:25,759 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-04-05 02:33:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:33:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-05 02:33:25,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:25,760 INFO L225 Difference]: With dead ends: 51 [2022-04-05 02:33:25,760 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 02:33:25,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:33:25,761 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:25,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 02:33:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 02:33:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 02:33:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 02:33:25,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-05 02:33:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:25,768 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 02:33:25,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 02:33:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 02:33:25,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:25,769 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:25,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:25,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 02:33:25,979 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-05 02:33:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497973855] [2022-04-05 02:33:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:25,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:25,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103664113] [2022-04-05 02:33:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:25,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:25,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:25,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:25,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:33:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:33:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:33:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:33:26,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497973855] [2022-04-05 02:33:26,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103664113] [2022-04-05 02:33:26,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103664113] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:26,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 02:33:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570951950] [2022-04-05 02:33:26,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:26,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:33:26,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:33:26,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 02:33:26,194 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:26,371 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-04-05 02:33:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:33:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 02:33:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:26,374 INFO L225 Difference]: With dead ends: 96 [2022-04-05 02:33:26,374 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 02:33:26,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:33:26,375 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:26,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 02:33:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-05 02:33:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:33:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-05 02:33:26,382 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-05 02:33:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:26,383 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-05 02:33:26,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:33:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-05 02:33:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:33:26,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:26,384 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:26,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:26,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:26,600 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-05 02:33:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459840292] [2022-04-05 02:33:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:26,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990011365] [2022-04-05 02:33:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:26,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:26,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:26,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:26,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:33:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 02:33:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:33:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459840292] [2022-04-05 02:33:27,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:27,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990011365] [2022-04-05 02:33:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990011365] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:33:27,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:33:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-05 02:33:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697073855] [2022-04-05 02:33:27,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:27,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 02:33:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 02:33:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:33:27,133 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 02:33:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:27,205 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-04-05 02:33:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 02:33:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-04-05 02:33:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:27,209 INFO L225 Difference]: With dead ends: 77 [2022-04-05 02:33:27,209 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 02:33:27,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:33:27,211 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:27,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 197 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 02:33:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-05 02:33:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:33:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-05 02:33:27,230 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-05 02:33:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:27,230 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-05 02:33:27,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-05 02:33:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-05 02:33:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:33:27,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:27,232 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:27,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:27,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:27,432 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-05 02:33:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344723351] [2022-04-05 02:33:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:27,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:27,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442829509] [2022-04-05 02:33:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:27,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:27,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:27,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:33:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 02:33:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:33:27,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:27,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344723351] [2022-04-05 02:33:27,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:27,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442829509] [2022-04-05 02:33:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442829509] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:27,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:27,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-05 02:33:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161557871] [2022-04-05 02:33:27,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:27,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:33:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:33:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:33:27,895 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:33:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:28,470 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-04-05 02:33:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 02:33:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-04-05 02:33:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:28,471 INFO L225 Difference]: With dead ends: 116 [2022-04-05 02:33:28,472 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 02:33:28,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-04-05 02:33:28,473 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:28,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 265 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:33:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 02:33:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-04-05 02:33:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 02:33:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-04-05 02:33:28,479 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-04-05 02:33:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:28,480 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-04-05 02:33:28,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:33:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-04-05 02:33:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:33:28,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:28,481 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:28,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:28,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:28,699 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-05 02:33:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:28,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148380713] [2022-04-05 02:33:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:28,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:28,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761022526] [2022-04-05 02:33:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:28,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:28,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:33:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:28,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:33:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:33:28,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:28,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:28,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148380713] [2022-04-05 02:33:28,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761022526] [2022-04-05 02:33:28,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761022526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:28,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:28,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:33:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337247901] [2022-04-05 02:33:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:28,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:33:28,829 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:33:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:28,858 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-04-05 02:33:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:33:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-05 02:33:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:28,861 INFO L225 Difference]: With dead ends: 149 [2022-04-05 02:33:28,861 INFO L226 Difference]: Without dead ends: 149 [2022-04-05 02:33:28,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:33:28,863 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:28,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-05 02:33:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-04-05 02:33:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-05 02:33:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-04-05 02:33:28,883 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-04-05 02:33:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:28,883 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-04-05 02:33:28,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:33:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-04-05 02:33:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:33:28,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:28,884 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:28,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:29,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:29,099 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-04-05 02:33:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993415031] [2022-04-05 02:33:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:29,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:29,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:29,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937903107] [2022-04-05 02:33:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:29,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:29,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:29,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:29,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:33:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 02:33:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:33:29,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993415031] [2022-04-05 02:33:29,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937903107] [2022-04-05 02:33:29,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937903107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:29,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:29,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2022-04-05 02:33:29,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665989665] [2022-04-05 02:33:29,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:29,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:33:29,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:33:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:33:29,619 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 02:33:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:30,831 INFO L93 Difference]: Finished difference Result 191 states and 266 transitions. [2022-04-05 02:33:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 02:33:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-04-05 02:33:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:30,834 INFO L225 Difference]: With dead ends: 191 [2022-04-05 02:33:30,835 INFO L226 Difference]: Without dead ends: 191 [2022-04-05 02:33:30,835 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-04-05 02:33:30,835 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:30,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 266 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 550 Invalid, 0 Unknown, 81 Unchecked, 0.7s Time] [2022-04-05 02:33:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-05 02:33:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2022-04-05 02:33:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 112 states have (on average 1.25) internal successors, (140), 118 states have internal predecessors, (140), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-05 02:33:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 248 transitions. [2022-04-05 02:33:30,843 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 248 transitions. Word has length 47 [2022-04-05 02:33:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:30,843 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 248 transitions. [2022-04-05 02:33:30,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-05 02:33:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 248 transitions. [2022-04-05 02:33:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:33:30,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:30,844 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:30,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:31,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:31,060 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-04-05 02:33:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:31,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610985251] [2022-04-05 02:33:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:31,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:31,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88912521] [2022-04-05 02:33:31,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:33:31,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:31,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:31,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:33:31,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:33:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:33:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:33:31,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:31,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610985251] [2022-04-05 02:33:31,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:31,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88912521] [2022-04-05 02:33:31,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88912521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:31,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:31,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:33:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657682353] [2022-04-05 02:33:31,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:31,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:33:31,166 INFO L87 Difference]: Start difference. First operand 178 states and 248 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:31,273 INFO L93 Difference]: Finished difference Result 148 states and 197 transitions. [2022-04-05 02:33:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:33:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-05 02:33:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:31,275 INFO L225 Difference]: With dead ends: 148 [2022-04-05 02:33:31,276 INFO L226 Difference]: Without dead ends: 148 [2022-04-05 02:33:31,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:33:31,277 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:31,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:33:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-05 02:33:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2022-04-05 02:33:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 89 states have internal predecessors, (100), 45 states have call successors, (45), 11 states have call predecessors, (45), 10 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-05 02:33:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 188 transitions. [2022-04-05 02:33:31,284 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 188 transitions. Word has length 47 [2022-04-05 02:33:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:31,284 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 188 transitions. [2022-04-05 02:33:31,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:33:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 188 transitions. [2022-04-05 02:33:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 02:33:31,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:31,285 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:31,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:31,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 02:33:31,496 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-05 02:33:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:31,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532528815] [2022-04-05 02:33:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:31,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:31,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970220514] [2022-04-05 02:33:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:31,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:31,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:31,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 02:33:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:33:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 02:33:31,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:31,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532528815] [2022-04-05 02:33:31,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970220514] [2022-04-05 02:33:31,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970220514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:31,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:31,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:33:31,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619481526] [2022-04-05 02:33:31,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:31,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:31,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:33:31,639 INFO L87 Difference]: Start difference. First operand 140 states and 188 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:33:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:31,678 INFO L93 Difference]: Finished difference Result 196 states and 281 transitions. [2022-04-05 02:33:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:33:31,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-05 02:33:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:31,682 INFO L225 Difference]: With dead ends: 196 [2022-04-05 02:33:31,682 INFO L226 Difference]: Without dead ends: 196 [2022-04-05 02:33:31,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:33:31,682 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:31,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-05 02:33:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2022-04-05 02:33:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 100 states have internal predecessors, (107), 71 states have call successors, (71), 12 states have call predecessors, (71), 11 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-05 02:33:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 247 transitions. [2022-04-05 02:33:31,690 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 247 transitions. Word has length 52 [2022-04-05 02:33:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:31,691 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 247 transitions. [2022-04-05 02:33:31,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:33:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 247 transitions. [2022-04-05 02:33:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 02:33:31,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:31,695 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:31,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:31,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 02:33:31,907 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-05 02:33:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447582504] [2022-04-05 02:33:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:31,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:31,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168344927] [2022-04-05 02:33:31,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:31,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:31,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:31,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:31,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 02:33:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-05 02:33:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-05 02:33:32,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-05 02:33:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447582504] [2022-04-05 02:33:32,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168344927] [2022-04-05 02:33:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168344927] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:32,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:32,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-04-05 02:33:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876556216] [2022-04-05 02:33:32,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:32,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 02:33:32,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:32,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 02:33:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:33:32,780 INFO L87 Difference]: Start difference. First operand 174 states and 247 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-05 02:33:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:36,388 INFO L93 Difference]: Finished difference Result 335 states and 494 transitions. [2022-04-05 02:33:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-05 02:33:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-04-05 02:33:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:36,390 INFO L225 Difference]: With dead ends: 335 [2022-04-05 02:33:36,390 INFO L226 Difference]: Without dead ends: 333 [2022-04-05 02:33:36,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-04-05 02:33:36,391 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:36,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 236 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-05 02:33:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-04-05 02:33:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 273. [2022-04-05 02:33:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 158 states have (on average 1.2025316455696202) internal successors, (190), 166 states have internal predecessors, (190), 99 states have call successors, (99), 16 states have call predecessors, (99), 15 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-05 02:33:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 386 transitions. [2022-04-05 02:33:36,401 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 386 transitions. Word has length 64 [2022-04-05 02:33:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:36,401 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 386 transitions. [2022-04-05 02:33:36,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-05 02:33:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 386 transitions. [2022-04-05 02:33:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-05 02:33:36,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:36,402 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:36,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:36,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 02:33:36,603 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-04-05 02:33:36,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:36,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976355035] [2022-04-05 02:33:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:36,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:36,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:36,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500862063] [2022-04-05 02:33:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:36,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:36,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:36,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:36,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 02:33:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 02:33:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-05 02:33:37,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-05 02:33:37,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976355035] [2022-04-05 02:33:37,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500862063] [2022-04-05 02:33:37,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500862063] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:33:37,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:33:37,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-04-05 02:33:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673190785] [2022-04-05 02:33:37,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:37,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:33:37,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:37,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:33:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:33:37,198 INFO L87 Difference]: Start difference. First operand 273 states and 386 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-05 02:33:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:37,248 INFO L93 Difference]: Finished difference Result 277 states and 389 transitions. [2022-04-05 02:33:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:33:37,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-04-05 02:33:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:37,250 INFO L225 Difference]: With dead ends: 277 [2022-04-05 02:33:37,250 INFO L226 Difference]: Without dead ends: 277 [2022-04-05 02:33:37,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:33:37,251 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:37,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-05 02:33:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-04-05 02:33:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 169 states have internal predecessors, (193), 99 states have call successors, (99), 17 states have call predecessors, (99), 16 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-05 02:33:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 389 transitions. [2022-04-05 02:33:37,269 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 389 transitions. Word has length 74 [2022-04-05 02:33:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:37,269 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 389 transitions. [2022-04-05 02:33:37,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-05 02:33:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 389 transitions. [2022-04-05 02:33:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 02:33:37,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:37,270 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:37,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:37,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 02:33:37,483 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-04-05 02:33:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667983444] [2022-04-05 02:33:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:37,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998005609] [2022-04-05 02:33:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:37,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:37,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 02:33:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:33:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 02:33:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-05 02:33:37,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-05 02:33:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667983444] [2022-04-05 02:33:37,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998005609] [2022-04-05 02:33:37,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998005609] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:37,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:37,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-05 02:33:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212418923] [2022-04-05 02:33:37,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:37,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 02:33:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 02:33:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-05 02:33:37,924 INFO L87 Difference]: Start difference. First operand 277 states and 389 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:33:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:38,202 INFO L93 Difference]: Finished difference Result 317 states and 448 transitions. [2022-04-05 02:33:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 02:33:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-04-05 02:33:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:38,203 INFO L225 Difference]: With dead ends: 317 [2022-04-05 02:33:38,203 INFO L226 Difference]: Without dead ends: 317 [2022-04-05 02:33:38,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:33:38,204 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 74 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:38,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:33:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-05 02:33:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 281. [2022-04-05 02:33:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 164 states have (on average 1.1951219512195121) internal successors, (196), 172 states have internal predecessors, (196), 99 states have call successors, (99), 18 states have call predecessors, (99), 17 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-04-05 02:33:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 392 transitions. [2022-04-05 02:33:38,217 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 392 transitions. Word has length 72 [2022-04-05 02:33:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:38,217 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 392 transitions. [2022-04-05 02:33:38,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:33:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 392 transitions. [2022-04-05 02:33:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 02:33:38,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:38,220 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:38,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:38,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 02:33:38,437 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-04-05 02:33:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:38,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006133948] [2022-04-05 02:33:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:38,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754496521] [2022-04-05 02:33:38,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:33:38,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:38,446 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:38,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 02:33:38,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:33:38,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 02:33:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 02:33:38,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:33:38,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:38,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006133948] [2022-04-05 02:33:38,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:38,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754496521] [2022-04-05 02:33:38,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754496521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:33:38,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:33:38,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:33:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479322528] [2022-04-05 02:33:38,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:33:38,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:33:38,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:33:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:33:38,586 INFO L87 Difference]: Start difference. First operand 281 states and 392 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 02:33:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:33:38,625 INFO L93 Difference]: Finished difference Result 294 states and 397 transitions. [2022-04-05 02:33:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:33:38,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-05 02:33:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:33:38,626 INFO L225 Difference]: With dead ends: 294 [2022-04-05 02:33:38,626 INFO L226 Difference]: Without dead ends: 294 [2022-04-05 02:33:38,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:33:38,627 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:33:38,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 139 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:33:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-05 02:33:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 279. [2022-04-05 02:33:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 170 states have (on average 1.188235294117647) internal successors, (202), 171 states have internal predecessors, (202), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-04-05 02:33:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 382 transitions. [2022-04-05 02:33:38,665 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 382 transitions. Word has length 77 [2022-04-05 02:33:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:33:38,665 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 382 transitions. [2022-04-05 02:33:38,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 02:33:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 382 transitions. [2022-04-05 02:33:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 02:33:38,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:33:38,666 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:33:38,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 02:33:38,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 02:33:38,867 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:33:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:33:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-04-05 02:33:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:33:38,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267588013] [2022-04-05 02:33:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:33:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:33:38,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:33:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543531625] [2022-04-05 02:33:38,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:33:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:33:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:33:38,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:33:38,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 02:33:38,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 02:33:38,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:33:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 02:33:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:33:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 02:33:39,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:33:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 02:33:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:33:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267588013] [2022-04-05 02:33:40,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:33:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543531625] [2022-04-05 02:33:40,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543531625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:33:40,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:33:40,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-05 02:33:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206763369] [2022-04-05 02:33:40,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:33:40,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 02:33:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:33:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 02:33:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-04-05 02:33:40,998 INFO L87 Difference]: Start difference. First operand 279 states and 382 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 02:33:43,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:33:55,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:34:09,568 INFO L93 Difference]: Finished difference Result 419 states and 572 transitions. [2022-04-05 02:34:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 02:34:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-04-05 02:34:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:34:09,571 INFO L225 Difference]: With dead ends: 419 [2022-04-05 02:34:09,571 INFO L226 Difference]: Without dead ends: 419 [2022-04-05 02:34:09,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=692, Invalid=2387, Unknown=1, NotChecked=0, Total=3080 [2022-04-05 02:34:09,572 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 279 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 449 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-04-05 02:34:09,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 503 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1222 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2022-04-05 02:34:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-04-05 02:34:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 357. [2022-04-05 02:34:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 219 states have (on average 1.187214611872146) internal successors, (260), 220 states have internal predecessors, (260), 115 states have call successors, (115), 23 states have call predecessors, (115), 22 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-04-05 02:34:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 488 transitions. [2022-04-05 02:34:09,582 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 488 transitions. Word has length 77 [2022-04-05 02:34:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:34:09,582 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 488 transitions. [2022-04-05 02:34:09,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 02:34:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 488 transitions. [2022-04-05 02:34:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 02:34:09,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:34:09,583 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:34:09,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 02:34:09,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:09,784 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:34:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:34:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-04-05 02:34:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:34:09,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39575812] [2022-04-05 02:34:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:34:09,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:34:09,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249555166] [2022-04-05 02:34:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:34:09,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:34:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:34:09,800 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:34:09,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 02:34:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:34:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-05 02:34:09,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:34:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 02:34:10,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:34:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-05 02:34:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:34:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39575812] [2022-04-05 02:34:12,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:34:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249555166] [2022-04-05 02:34:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249555166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:34:12,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:34:12,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-04-05 02:34:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280934654] [2022-04-05 02:34:12,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:34:12,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 02:34:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:34:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 02:34:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-04-05 02:34:12,122 INFO L87 Difference]: Start difference. First operand 357 states and 488 transitions. Second operand has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-05 02:34:21,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:24,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:31,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:34,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:36,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:41,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:43,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:45,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:48,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:51,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:34:55,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:01,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:10,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:12,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:15,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:27,215 INFO L93 Difference]: Finished difference Result 576 states and 817 transitions. [2022-04-05 02:35:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-05 02:35:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 91 [2022-04-05 02:35:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:27,218 INFO L225 Difference]: With dead ends: 576 [2022-04-05 02:35:27,218 INFO L226 Difference]: Without dead ends: 574 [2022-04-05 02:35:27,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1086, Invalid=5556, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 02:35:27,219 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 184 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 448 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:27,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 626 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2556 Invalid, 14 Unknown, 0 Unchecked, 59.1s Time] [2022-04-05 02:35:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-04-05 02:35:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 457. [2022-04-05 02:35:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 274 states have (on average 1.2007299270072993) internal successors, (329), 275 states have internal predecessors, (329), 155 states have call successors, (155), 28 states have call predecessors, (155), 27 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-05 02:35:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 637 transitions. [2022-04-05 02:35:27,234 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 637 transitions. Word has length 91 [2022-04-05 02:35:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:27,234 INFO L478 AbstractCegarLoop]: Abstraction has 457 states and 637 transitions. [2022-04-05 02:35:27,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-05 02:35:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 637 transitions. [2022-04-05 02:35:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 02:35:27,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:27,235 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:27,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-05 02:35:27,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 02:35:27,447 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-04-05 02:35:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604090721] [2022-04-05 02:35:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:27,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:27,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72098110] [2022-04-05 02:35:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:27,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:27,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 02:35:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 02:35:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-05 02:35:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 02:35:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:28,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604090721] [2022-04-05 02:35:28,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:28,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72098110] [2022-04-05 02:35:28,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72098110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:28,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:28,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2022-04-05 02:35:28,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197173837] [2022-04-05 02:35:28,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:28,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 02:35:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 02:35:28,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:35:28,419 INFO L87 Difference]: Start difference. First operand 457 states and 637 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-04-05 02:35:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:31,159 INFO L93 Difference]: Finished difference Result 748 states and 1120 transitions. [2022-04-05 02:35:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 02:35:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-04-05 02:35:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:31,162 INFO L225 Difference]: With dead ends: 748 [2022-04-05 02:35:31,162 INFO L226 Difference]: Without dead ends: 748 [2022-04-05 02:35:31,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-04-05 02:35:31,164 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 160 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:31,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 675 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 850 Invalid, 0 Unknown, 179 Unchecked, 1.5s Time] [2022-04-05 02:35:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-04-05 02:35:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 711. [2022-04-05 02:35:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 378 states have (on average 1.2645502645502646) internal successors, (478), 379 states have internal predecessors, (478), 303 states have call successors, (303), 30 states have call predecessors, (303), 29 states have return successors, (301), 301 states have call predecessors, (301), 301 states have call successors, (301) [2022-04-05 02:35:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1082 transitions. [2022-04-05 02:35:31,178 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1082 transitions. Word has length 94 [2022-04-05 02:35:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:31,178 INFO L478 AbstractCegarLoop]: Abstraction has 711 states and 1082 transitions. [2022-04-05 02:35:31,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-04-05 02:35:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1082 transitions. [2022-04-05 02:35:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 02:35:31,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:31,180 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:31,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:31,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 02:35:31,395 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-04-05 02:35:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803423997] [2022-04-05 02:35:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:31,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:31,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:31,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213980079] [2022-04-05 02:35:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:31,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:31,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 02:35:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-05 02:35:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-05 02:35:32,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 43 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 02:35:35,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803423997] [2022-04-05 02:35:35,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:35,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213980079] [2022-04-05 02:35:35,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213980079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:35,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:35,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-04-05 02:35:35,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634479805] [2022-04-05 02:35:35,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:35,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 02:35:35,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 02:35:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-04-05 02:35:35,936 INFO L87 Difference]: Start difference. First operand 711 states and 1082 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-05 02:35:41,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:44,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:51,676 INFO L93 Difference]: Finished difference Result 857 states and 1305 transitions. [2022-04-05 02:35:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 02:35:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) Word has length 94 [2022-04-05 02:35:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:51,683 INFO L225 Difference]: With dead ends: 857 [2022-04-05 02:35:51,683 INFO L226 Difference]: Without dead ends: 857 [2022-04-05 02:35:51,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=783, Invalid=2757, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 02:35:51,684 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 369 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:51,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 372 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1496 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-04-05 02:35:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-04-05 02:35:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 850. [2022-04-05 02:35:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 459 states have (on average 1.2657952069716776) internal successors, (581), 460 states have internal predecessors, (581), 359 states have call successors, (359), 32 states have call predecessors, (359), 31 states have return successors, (357), 357 states have call predecessors, (357), 357 states have call successors, (357) [2022-04-05 02:35:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1297 transitions. [2022-04-05 02:35:51,711 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1297 transitions. Word has length 94 [2022-04-05 02:35:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:51,712 INFO L478 AbstractCegarLoop]: Abstraction has 850 states and 1297 transitions. [2022-04-05 02:35:51,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 10 states have call successors, (27) [2022-04-05 02:35:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1297 transitions. [2022-04-05 02:35:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-05 02:35:51,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:51,713 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:51,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-05 02:35:51,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 02:35:51,930 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-04-05 02:35:51,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243024567] [2022-04-05 02:35:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:51,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:51,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992163756] [2022-04-05 02:35:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:51,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:51,956 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:51,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 02:35:52,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:52,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 02:35:52,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-05 02:35:52,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-05 02:35:52,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243024567] [2022-04-05 02:35:52,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992163756] [2022-04-05 02:35:52,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992163756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:52,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:52,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-04-05 02:35:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579071173] [2022-04-05 02:35:52,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:52,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 02:35:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 02:35:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:35:52,319 INFO L87 Difference]: Start difference. First operand 850 states and 1297 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:35:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:52,888 INFO L93 Difference]: Finished difference Result 966 states and 1471 transitions. [2022-04-05 02:35:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 02:35:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-04-05 02:35:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:52,892 INFO L225 Difference]: With dead ends: 966 [2022-04-05 02:35:52,892 INFO L226 Difference]: Without dead ends: 966 [2022-04-05 02:35:52,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-04-05 02:35:52,893 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 61 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:52,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 436 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 02:35:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-04-05 02:35:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 805. [2022-04-05 02:35:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 426 states have (on average 1.2746478873239437) internal successors, (543), 427 states have internal predecessors, (543), 347 states have call successors, (347), 32 states have call predecessors, (347), 31 states have return successors, (345), 345 states have call predecessors, (345), 345 states have call successors, (345) [2022-04-05 02:35:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1235 transitions. [2022-04-05 02:35:52,912 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1235 transitions. Word has length 99 [2022-04-05 02:35:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:52,912 INFO L478 AbstractCegarLoop]: Abstraction has 805 states and 1235 transitions. [2022-04-05 02:35:52,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:35:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1235 transitions. [2022-04-05 02:35:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-05 02:35:52,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:52,913 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:52,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-05 02:35:53,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:53,130 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:53,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1112008279, now seen corresponding path program 2 times [2022-04-05 02:35:53,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402204251] [2022-04-05 02:35:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:53,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:53,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883307997] [2022-04-05 02:35:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:53,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 02:35:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:53,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-05 02:35:53,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-05 02:35:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:54,868 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:35:55,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:55,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402204251] [2022-04-05 02:35:55,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:55,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883307997] [2022-04-05 02:35:55,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883307997] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 02:35:55,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:35:55,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-05 02:35:55,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92263718] [2022-04-05 02:35:55,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:55,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 02:35:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:55,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 02:35:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-04-05 02:35:55,292 INFO L87 Difference]: Start difference. First operand 805 states and 1235 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-05 02:35:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:56,647 INFO L93 Difference]: Finished difference Result 903 states and 1376 transitions. [2022-04-05 02:35:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 02:35:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-04-05 02:35:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:56,651 INFO L225 Difference]: With dead ends: 903 [2022-04-05 02:35:56,651 INFO L226 Difference]: Without dead ends: 898 [2022-04-05 02:35:56,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-04-05 02:35:56,652 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:56,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 364 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 02:35:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-04-05 02:35:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 886. [2022-04-05 02:35:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 467 states have (on average 1.2740899357601714) internal successors, (595), 468 states have internal predecessors, (595), 383 states have call successors, (383), 36 states have call predecessors, (383), 35 states have return successors, (381), 381 states have call predecessors, (381), 381 states have call successors, (381) [2022-04-05 02:35:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1359 transitions. [2022-04-05 02:35:56,675 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1359 transitions. Word has length 111 [2022-04-05 02:35:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:56,676 INFO L478 AbstractCegarLoop]: Abstraction has 886 states and 1359 transitions. [2022-04-05 02:35:56,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-05 02:35:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1359 transitions. [2022-04-05 02:35:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-05 02:35:56,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:56,677 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:56,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:56,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:56,891 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 2 times [2022-04-05 02:35:56,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:56,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180200384] [2022-04-05 02:35:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:56,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:56,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930837722] [2022-04-05 02:35:56,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:56,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:56,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:56,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:56,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 02:35:56,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 02:35:56,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-04-05 02:35:57,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-04-05 02:35:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180200384] [2022-04-05 02:35:58,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930837722] [2022-04-05 02:35:58,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930837722] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:58,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:58,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-04-05 02:35:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780156375] [2022-04-05 02:35:58,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:58,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 02:35:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 02:35:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-04-05 02:35:58,338 INFO L87 Difference]: Start difference. First operand 886 states and 1359 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-04-05 02:36:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:36:05,276 INFO L93 Difference]: Finished difference Result 1592 states and 2547 transitions. [2022-04-05 02:36:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 02:36:05,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 121 [2022-04-05 02:36:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:36:05,282 INFO L225 Difference]: With dead ends: 1592 [2022-04-05 02:36:05,282 INFO L226 Difference]: Without dead ends: 1592 [2022-04-05 02:36:05,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=686, Invalid=2506, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 02:36:05,283 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 154 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-05 02:36:05,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 755 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1275 Invalid, 0 Unknown, 120 Unchecked, 3.8s Time] [2022-04-05 02:36:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-04-05 02:36:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1502. [2022-04-05 02:36:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 711 states have (on average 1.3319268635724333) internal successors, (947), 712 states have internal predecessors, (947), 751 states have call successors, (751), 40 states have call predecessors, (751), 39 states have return successors, (749), 749 states have call predecessors, (749), 749 states have call successors, (749) [2022-04-05 02:36:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2447 transitions. [2022-04-05 02:36:05,315 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2447 transitions. Word has length 121 [2022-04-05 02:36:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:36:05,315 INFO L478 AbstractCegarLoop]: Abstraction has 1502 states and 2447 transitions. [2022-04-05 02:36:05,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 22 states have internal predecessors, (52), 11 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-04-05 02:36:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2447 transitions. [2022-04-05 02:36:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-05 02:36:05,316 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:36:05,317 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:36:05,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 02:36:05,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-05 02:36:05,533 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:36:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:36:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -455563815, now seen corresponding path program 3 times [2022-04-05 02:36:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:36:05,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415682612] [2022-04-05 02:36:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:36:05,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:36:05,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:36:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260000908] [2022-04-05 02:36:05,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:36:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:36:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:36:05,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:36:05,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 02:36:05,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 02:36:05,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:36:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-05 02:36:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:36:06,132 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:36:32,606 WARN L232 SmtUtils]: Spent 18.51s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:36:50,378 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:36:50,382 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:36:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 102 proven. 28 refuted. 2 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-05 02:36:56,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:37:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 90 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-05 02:37:11,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:37:11,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415682612] [2022-04-05 02:37:11,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:37:11,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260000908] [2022-04-05 02:37:11,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260000908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:37:11,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:37:11,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-04-05 02:37:11,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345101193] [2022-04-05 02:37:11,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:37:11,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 02:37:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:37:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 02:37:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=424, Unknown=7, NotChecked=0, Total=506 [2022-04-05 02:37:11,423 INFO L87 Difference]: Start difference. First operand 1502 states and 2447 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-05 02:37:15,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:37:18,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:37:32,672 WARN L232 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 57 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:37:51,972 WARN L232 SmtUtils]: Spent 17.94s on a formula simplification. DAG size of input: 83 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:38:01,567 WARN L232 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 98 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:38:03,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:05,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:07,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:22,210 WARN L232 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 74 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:38:27,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:31,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:34,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:38:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:38:34,907 INFO L93 Difference]: Finished difference Result 1712 states and 2788 transitions. [2022-04-05 02:38:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 02:38:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2022-04-05 02:38:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:38:34,917 INFO L225 Difference]: With dead ends: 1712 [2022-04-05 02:38:34,917 INFO L226 Difference]: Without dead ends: 1710 [2022-04-05 02:38:34,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 97.6s TimeCoverageRelationStatistics Valid=333, Invalid=1381, Unknown=8, NotChecked=0, Total=1722 [2022-04-05 02:38:34,918 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 126 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 248 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:38:34,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 303 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 720 Invalid, 6 Unknown, 0 Unchecked, 25.2s Time] [2022-04-05 02:38:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-04-05 02:38:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1504. [2022-04-05 02:38:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 713 states have (on average 1.329593267882188) internal successors, (948), 713 states have internal predecessors, (948), 751 states have call successors, (751), 41 states have call predecessors, (751), 39 states have return successors, (749), 749 states have call predecessors, (749), 749 states have call successors, (749) [2022-04-05 02:38:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2448 transitions. [2022-04-05 02:38:34,989 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2448 transitions. Word has length 121 [2022-04-05 02:38:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:38:34,989 INFO L478 AbstractCegarLoop]: Abstraction has 1504 states and 2448 transitions. [2022-04-05 02:38:34,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-05 02:38:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2448 transitions. [2022-04-05 02:38:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-05 02:38:34,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:38:34,992 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:38:35,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 02:38:35,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-05 02:38:35,224 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:38:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:38:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1630901606, now seen corresponding path program 3 times [2022-04-05 02:38:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:38:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593749788] [2022-04-05 02:38:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:38:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:38:35,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:38:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953558570] [2022-04-05 02:38:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:38:35,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:38:35,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:38:35,233 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:38:35,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 02:38:35,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 02:38:35,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:38:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-05 02:38:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:38:37,616 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:38:37,618 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:38:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-04-05 02:38:37,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:38:44,779 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 02:45:43,930 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~d~0_BEFORE_CALL_131 Int) (v_main_~y~0_BEFORE_CALL_143 Int) (v_main_~p~0_BEFORE_CALL_117 Int) (v_main_~x~0_BEFORE_CALL_162 Int) (v_main_~v~0_BEFORE_CALL_155 Int) (v_main_~c~0_BEFORE_CALL_176 Int) (v_main_~q~0_BEFORE_CALL_115 Int) (v_main_~k~0_BEFORE_CALL_160 Int) (v_main_~s~0_BEFORE_CALL_133 Int) (v_main_~r~0_BEFORE_CALL_117 Int)) (let ((.cse3 (* v_main_~v~0_BEFORE_CALL_155 (- 1)))) (let ((.cse2 (+ v_main_~k~0_BEFORE_CALL_160 v_main_~d~0_BEFORE_CALL_131)) (.cse1 (+ .cse3 v_main_~c~0_BEFORE_CALL_176))) (or (let ((.cse0 (+ (* .cse1 .cse2) (* (- 1) .cse1 v_main_~k~0_BEFORE_CALL_160)))) (and (= v_main_~v~0_BEFORE_CALL_155 (* (div .cse0 .cse1) .cse1)) (= (mod .cse0 .cse1) 0))) (= (+ (* 2 (* v_main_~y~0_BEFORE_CALL_143 v_main_~s~0_BEFORE_CALL_133)) (* 2 (* v_main_~x~0_BEFORE_CALL_162 v_main_~q~0_BEFORE_CALL_115)) (* v_main_~y~0_BEFORE_CALL_143 v_main_~s~0_BEFORE_CALL_133 .cse2) (* v_main_~x~0_BEFORE_CALL_162 .cse2 v_main_~q~0_BEFORE_CALL_115)) (+ (* v_main_~p~0_BEFORE_CALL_117 v_main_~x~0_BEFORE_CALL_162) (* v_main_~y~0_BEFORE_CALL_143 v_main_~r~0_BEFORE_CALL_117) .cse3 v_main_~c~0_BEFORE_CALL_176)) (<= v_main_~c~0_BEFORE_CALL_176 v_main_~v~0_BEFORE_CALL_155) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (not (= v_main_~v~0_BEFORE_CALL_155 (* .cse1 v_main_~d~0_BEFORE_CALL_131)))) (<= (* v_main_~v~0_BEFORE_CALL_155 2) v_main_~c~0_BEFORE_CALL_176))))) is different from false [2022-04-05 02:45:45,934 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~d~0_BEFORE_CALL_131 Int) (v_main_~y~0_BEFORE_CALL_143 Int) (v_main_~p~0_BEFORE_CALL_117 Int) (v_main_~x~0_BEFORE_CALL_162 Int) (v_main_~v~0_BEFORE_CALL_155 Int) (v_main_~c~0_BEFORE_CALL_176 Int) (v_main_~q~0_BEFORE_CALL_115 Int) (v_main_~k~0_BEFORE_CALL_160 Int) (v_main_~s~0_BEFORE_CALL_133 Int) (v_main_~r~0_BEFORE_CALL_117 Int)) (let ((.cse3 (* v_main_~v~0_BEFORE_CALL_155 (- 1)))) (let ((.cse2 (+ v_main_~k~0_BEFORE_CALL_160 v_main_~d~0_BEFORE_CALL_131)) (.cse1 (+ .cse3 v_main_~c~0_BEFORE_CALL_176))) (or (let ((.cse0 (+ (* .cse1 .cse2) (* (- 1) .cse1 v_main_~k~0_BEFORE_CALL_160)))) (and (= v_main_~v~0_BEFORE_CALL_155 (* (div .cse0 .cse1) .cse1)) (= (mod .cse0 .cse1) 0))) (= (+ (* 2 (* v_main_~y~0_BEFORE_CALL_143 v_main_~s~0_BEFORE_CALL_133)) (* 2 (* v_main_~x~0_BEFORE_CALL_162 v_main_~q~0_BEFORE_CALL_115)) (* v_main_~y~0_BEFORE_CALL_143 v_main_~s~0_BEFORE_CALL_133 .cse2) (* v_main_~x~0_BEFORE_CALL_162 .cse2 v_main_~q~0_BEFORE_CALL_115)) (+ (* v_main_~p~0_BEFORE_CALL_117 v_main_~x~0_BEFORE_CALL_162) (* v_main_~y~0_BEFORE_CALL_143 v_main_~r~0_BEFORE_CALL_117) .cse3 v_main_~c~0_BEFORE_CALL_176)) (<= v_main_~c~0_BEFORE_CALL_176 v_main_~v~0_BEFORE_CALL_155) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (not (= v_main_~v~0_BEFORE_CALL_155 (* .cse1 v_main_~d~0_BEFORE_CALL_131)))) (<= (* v_main_~v~0_BEFORE_CALL_155 2) v_main_~c~0_BEFORE_CALL_176))))) is different from true