/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/ps6-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 07:19:22,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 07:19:22,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 07:19:23,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 07:19:23,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 07:19:23,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 07:19:23,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 07:19:23,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 07:19:23,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 07:19:23,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 07:19:23,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 07:19:23,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 07:19:23,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 07:19:23,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 07:19:23,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 07:19:23,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 07:19:23,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 07:19:23,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 07:19:23,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 07:19:23,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 07:19:23,070 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 07:19:23,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 07:19:23,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 07:19:23,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 07:19:23,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 07:19:23,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 07:19:23,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 07:19:23,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 07:19:23,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 07:19:23,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 07:19:23,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 07:19:23,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 07:19:23,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 07:19:23,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 07:19:23,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 07:19:23,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 07:19:23,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 07:19:23,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 07:19:23,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 07:19:23,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 07:19:23,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 07:19:23,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 07:19:23,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 07:19:23,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 07:19:23,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 07:19:23,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 07:19:23,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 07:19:23,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 07:19:23,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:19:23,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 07:19:23,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 07:19:23,106 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 07:19:23,106 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 07:19:23,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 07:19:23,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 07:19:23,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 07:19:23,358 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 07:19:23,363 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 07:19:23,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-03-20 07:19:23,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1011334b0/f8407b6993454591a6d376cb8fa36f6c/FLAGbc72017fb [2022-03-20 07:19:23,760 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 07:19:23,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-03-20 07:19:23,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1011334b0/f8407b6993454591a6d376cb8fa36f6c/FLAGbc72017fb [2022-03-20 07:19:24,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1011334b0/f8407b6993454591a6d376cb8fa36f6c [2022-03-20 07:19:24,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 07:19:24,189 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 07:19:24,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 07:19:24,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 07:19:24,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 07:19:24,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30834faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24, skipping insertion in model container [2022-03-20 07:19:24,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 07:19:24,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 07:19:24,340 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/ps6-ll_unwindbound50.c[458,471] [2022-03-20 07:19:24,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:19:24,362 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 07:19:24,372 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/ps6-ll_unwindbound50.c[458,471] [2022-03-20 07:19:24,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:19:24,386 INFO L208 MainTranslator]: Completed translation [2022-03-20 07:19:24,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24 WrapperNode [2022-03-20 07:19:24,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 07:19:24,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 07:19:24,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 07:19:24,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 07:19:24,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 07:19:24,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 07:19:24,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 07:19:24,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 07:19:24,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:19:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:24,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 07:19:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 07:19:24,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 07:19:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 07:19:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 07:19:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 07:19:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 07:19:24,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 07:19:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 07:19:24,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 07:19:24,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 07:19:24,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 07:19:24,531 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 07:19:24,532 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 07:19:24,611 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 07:19:24,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 07:19:24,616 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 07:19:24,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:19:24 BoogieIcfgContainer [2022-03-20 07:19:24,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 07:19:24,618 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 07:19:24,619 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 07:19:24,619 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 07:19:24,622 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:19:24" (1/1) ... [2022-03-20 07:19:24,637 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 07:19:24,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:19:24 BasicIcfg [2022-03-20 07:19:24,650 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 07:19:24,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 07:19:24,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 07:19:24,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 07:19:24,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:19:24" (1/4) ... [2022-03-20 07:19:24,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb3a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:19:24, skipping insertion in model container [2022-03-20 07:19:24,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:19:24" (2/4) ... [2022-03-20 07:19:24,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb3a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:19:24, skipping insertion in model container [2022-03-20 07:19:24,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:19:24" (3/4) ... [2022-03-20 07:19:24,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb3a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:19:24, skipping insertion in model container [2022-03-20 07:19:24,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:19:24" (4/4) ... [2022-03-20 07:19:24,685 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.cJordan [2022-03-20 07:19:24,690 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 07:19:24,690 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 07:19:24,748 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 07:19:24,754 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 07:19:24,754 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 07:19:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 07:19:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 07:19:24,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:24,792 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:24,792 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2022-03-20 07:19:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:24,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005459225] [2022-03-20 07:19:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:25,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:19:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:25,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 07:19:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:25,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005459225] [2022-03-20 07:19:25,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005459225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:19:25,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:19:25,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 07:19:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677612892] [2022-03-20 07:19:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:19:25,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 07:19:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 07:19:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:19:25,077 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:19:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:25,167 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 07:19:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 07:19:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 07:19:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:25,176 INFO L225 Difference]: With dead ends: 30 [2022-03-20 07:19:25,176 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 07:19:25,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:19:25,181 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:25,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 07:19:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 07:19:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 07:19:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 07:19:25,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-20 07:19:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:25,220 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 07:19:25,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:19:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 07:19:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 07:19:25,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:25,222 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:25,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 07:19:25,222 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2022-03-20 07:19:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:25,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582280983] [2022-03-20 07:19:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:25,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:25,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:25,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136249025] [2022-03-20 07:19:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:25,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:25,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 07:19:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 07:19:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:25,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:19:25,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:25,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582280983] [2022-03-20 07:19:25,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:25,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136249025] [2022-03-20 07:19:25,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136249025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:19:25,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:19:25,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:19:25,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865681481] [2022-03-20 07:19:25,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:19:25,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:19:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:19:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:19:25,393 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 07:19:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:25,402 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-20 07:19:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:19:25,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 07:19:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:25,403 INFO L225 Difference]: With dead ends: 26 [2022-03-20 07:19:25,403 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 07:19:25,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:19:25,405 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:25,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:19:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 07:19:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 07:19:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 07:19:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-20 07:19:25,410 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-20 07:19:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:25,410 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-20 07:19:25,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 07:19:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-20 07:19:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 07:19:25,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:25,411 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:25,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:25,631 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 [2022-03-20 07:19:25,632 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2022-03-20 07:19:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:25,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663840898] [2022-03-20 07:19:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:25,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:25,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948223090] [2022-03-20 07:19:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:25,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:25,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 07:19:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:25,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 07:19:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:25,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:19:25,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663840898] [2022-03-20 07:19:25,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948223090] [2022-03-20 07:19:25,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948223090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:19:25,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:19:25,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 07:19:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567845545] [2022-03-20 07:19:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:19:25,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:19:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:19:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:19:25,824 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:19:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:25,994 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-20 07:19:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:19:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 07:19:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:25,996 INFO L225 Difference]: With dead ends: 34 [2022-03-20 07:19:25,996 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 07:19:25,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 07:19:25,997 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:25,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:19:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 07:19:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 07:19:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 07:19:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 07:19:26,004 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 07:19:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:26,004 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 07:19:26,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:19:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 07:19:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 07:19:26,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:26,005 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:26,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 07:19:26,219 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 [2022-03-20 07:19:26,220 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2022-03-20 07:19:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503935412] [2022-03-20 07:19:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:26,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082826786] [2022-03-20 07:19:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:26,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:26,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 07:19:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 07:19:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:26,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503935412] [2022-03-20 07:19:26,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082826786] [2022-03-20 07:19:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082826786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 07:19:26,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 07:19:26,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 07:19:26,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632644716] [2022-03-20 07:19:26,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:26,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 07:19:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:26,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 07:19:26,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 07:19:26,474 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:19:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:26,557 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-03-20 07:19:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 07:19:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-03-20 07:19:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:26,561 INFO L225 Difference]: With dead ends: 58 [2022-03-20 07:19:26,561 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 07:19:26,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 07:19:26,565 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:26,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 128 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 07:19:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-03-20 07:19:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 07:19:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 07:19:26,579 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-03-20 07:19:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:26,579 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 07:19:26,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:19:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 07:19:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 07:19:26,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:26,586 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:26,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:26,786 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 [2022-03-20 07:19:26,787 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2022-03-20 07:19:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585419704] [2022-03-20 07:19:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:26,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:26,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779419152] [2022-03-20 07:19:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:26,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:26,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:26,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:26,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 07:19:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 07:19:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:19:26,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 07:19:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585419704] [2022-03-20 07:19:27,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779419152] [2022-03-20 07:19:27,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779419152] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:27,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:27,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 07:19:27,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394159004] [2022-03-20 07:19:27,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:19:27,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:19:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:19:27,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 07:19:27,126 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:19:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:27,160 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-03-20 07:19:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:19:27,161 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-20 07:19:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:27,163 INFO L225 Difference]: With dead ends: 66 [2022-03-20 07:19:27,163 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 07:19:27,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 07:19:27,164 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:27,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:19:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 07:19:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-03-20 07:19:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 07:19:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-20 07:19:27,177 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2022-03-20 07:19:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:27,178 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-20 07:19:27,178 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:19:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-20 07:19:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 07:19:27,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:27,179 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-03-20 07:19:27,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 07:19:27,383 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 [2022-03-20 07:19:27,384 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2022-03-20 07:19:27,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:27,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832671520] [2022-03-20 07:19:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:27,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:27,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893669930] [2022-03-20 07:19:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:27,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:27,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:27,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:27,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 07:19:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 07:19:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 07:19:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:27,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832671520] [2022-03-20 07:19:27,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:27,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893669930] [2022-03-20 07:19:27,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893669930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:27,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:27,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 07:19:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731661493] [2022-03-20 07:19:27,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:27,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 07:19:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 07:19:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 07:19:27,921 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 07:19:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:27,977 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-03-20 07:19:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 07:19:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 07:19:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:27,979 INFO L225 Difference]: With dead ends: 57 [2022-03-20 07:19:27,979 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 07:19:27,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 07:19:27,980 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:27,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:19:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 07:19:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 07:19:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 07:19:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 07:19:27,987 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2022-03-20 07:19:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:27,987 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 07:19:27,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 07:19:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 07:19:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 07:19:27,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:27,988 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:28,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:28,195 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 [2022-03-20 07:19:28,196 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2022-03-20 07:19:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:28,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839918723] [2022-03-20 07:19:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:28,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:28,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986230127] [2022-03-20 07:19:28,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:19:28,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:28,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:28,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:28,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 07:19:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:19:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 07:19:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 07:19:28,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:28,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:28,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839918723] [2022-03-20 07:19:28,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:28,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986230127] [2022-03-20 07:19:28,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986230127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:28,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:28,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 07:19:28,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954329714] [2022-03-20 07:19:28,681 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:28,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 07:19:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 07:19:28,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 07:19:28,682 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:19:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:28,757 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-03-20 07:19:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 07:19:28,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-03-20 07:19:28,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:28,759 INFO L225 Difference]: With dead ends: 56 [2022-03-20 07:19:28,759 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 07:19:28,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 07:19:28,760 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:28,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 07:19:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 07:19:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 07:19:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-20 07:19:28,764 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-03-20 07:19:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:28,764 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-20 07:19:28,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 07:19:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-20 07:19:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 07:19:28,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:28,765 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:28,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:28,970 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 [2022-03-20 07:19:28,971 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1280010632, now seen corresponding path program 3 times [2022-03-20 07:19:28,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419155842] [2022-03-20 07:19:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:28,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:28,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355637697] [2022-03-20 07:19:28,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:19:28,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:28,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:28,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 07:19:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 07:19:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 07:19:29,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 07:19:29,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419155842] [2022-03-20 07:19:29,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355637697] [2022-03-20 07:19:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355637697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:29,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:29,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 07:19:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101101219] [2022-03-20 07:19:29,823 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:29,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 07:19:29,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 07:19:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 07:19:29,824 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 07:19:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:29,919 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-20 07:19:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 07:19:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-03-20 07:19:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:29,921 INFO L225 Difference]: With dead ends: 58 [2022-03-20 07:19:29,921 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 07:19:29,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 07:19:29,922 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:29,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 07:19:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 07:19:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 07:19:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 07:19:29,932 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-03-20 07:19:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:29,932 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 07:19:29,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 07:19:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 07:19:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 07:19:29,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:29,934 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:29,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:30,139 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 [2022-03-20 07:19:30,139 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1735624483, now seen corresponding path program 1 times [2022-03-20 07:19:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608731504] [2022-03-20 07:19:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:30,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:30,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365334511] [2022-03-20 07:19:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:30,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:30,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 07:19:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 07:19:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 07:19:30,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 07:19:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608731504] [2022-03-20 07:19:30,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365334511] [2022-03-20 07:19:30,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365334511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 07:19:30,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 07:19:30,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 07:19:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470916488] [2022-03-20 07:19:30,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:30,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 07:19:30,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:30,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 07:19:30,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 07:19:30,490 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 07:19:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:30,657 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-20 07:19:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 07:19:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2022-03-20 07:19:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:30,659 INFO L225 Difference]: With dead ends: 130 [2022-03-20 07:19:30,659 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 07:19:30,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 07:19:30,660 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:30,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 195 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 07:19:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2022-03-20 07:19:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 07:19:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-03-20 07:19:30,668 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 55 [2022-03-20 07:19:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:30,668 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-03-20 07:19:30,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 07:19:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-03-20 07:19:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 07:19:30,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:30,669 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:30,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:30,882 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 [2022-03-20 07:19:30,883 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1029628710, now seen corresponding path program 4 times [2022-03-20 07:19:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:30,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436464449] [2022-03-20 07:19:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:30,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877823151] [2022-03-20 07:19:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:19:30,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:30,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:30,894 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:30,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 07:19:30,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:19:30,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 07:19:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 07:19:31,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:31,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436464449] [2022-03-20 07:19:31,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877823151] [2022-03-20 07:19:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877823151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:31,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:31,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 07:19:31,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144009968] [2022-03-20 07:19:31,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:31,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 07:19:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 07:19:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 07:19:31,343 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 07:19:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:31,436 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2022-03-20 07:19:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 07:19:31,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-03-20 07:19:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:31,437 INFO L225 Difference]: With dead ends: 108 [2022-03-20 07:19:31,438 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 07:19:31,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 07:19:31,438 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:31,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 318 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 07:19:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 07:19:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 07:19:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-03-20 07:19:31,445 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 61 [2022-03-20 07:19:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:31,446 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-03-20 07:19:31,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 07:19:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-03-20 07:19:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 07:19:31,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:31,447 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:31,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:31,651 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 [2022-03-20 07:19:31,651 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886980, now seen corresponding path program 5 times [2022-03-20 07:19:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931625383] [2022-03-20 07:19:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:31,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962181099] [2022-03-20 07:19:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:19:31,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:31,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:31,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 07:19:32,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 07:19:32,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 07:19:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 07:19:32,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:32,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931625383] [2022-03-20 07:19:32,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962181099] [2022-03-20 07:19:32,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962181099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:32,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:32,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 07:19:32,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3861057] [2022-03-20 07:19:32,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:32,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 07:19:32,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 07:19:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 07:19:32,523 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 07:19:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:32,647 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-03-20 07:19:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 07:19:32,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-03-20 07:19:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:32,648 INFO L225 Difference]: With dead ends: 107 [2022-03-20 07:19:32,648 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 07:19:32,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 07:19:32,649 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:32,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 07:19:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 07:19:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 07:19:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-03-20 07:19:32,655 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 69 [2022-03-20 07:19:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:32,655 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-03-20 07:19:32,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 07:19:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-03-20 07:19:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 07:19:32,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:32,656 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:32,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 07:19:32,862 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 [2022-03-20 07:19:32,862 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:32,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1006740382, now seen corresponding path program 6 times [2022-03-20 07:19:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:32,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164228033] [2022-03-20 07:19:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:32,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:32,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:32,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463537820] [2022-03-20 07:19:32,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:19:32,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:32,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:32,874 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 07:19:32,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 07:19:38,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 07:19:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 07:19:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 07:19:38,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:39,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164228033] [2022-03-20 07:19:39,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463537820] [2022-03-20 07:19:39,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463537820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:39,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:39,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 07:19:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873471581] [2022-03-20 07:19:39,223 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:39,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 07:19:39,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 07:19:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 07:19:39,224 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 07:19:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:39,369 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-03-20 07:19:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 07:19:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-03-20 07:19:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:39,370 INFO L225 Difference]: With dead ends: 106 [2022-03-20 07:19:39,370 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 07:19:39,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 07:19:39,371 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:39,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 454 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 07:19:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 07:19:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 07:19:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-03-20 07:19:39,375 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 77 [2022-03-20 07:19:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:39,376 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-03-20 07:19:39,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 07:19:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-03-20 07:19:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 07:19:39,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:39,377 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:39,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:39,589 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 [2022-03-20 07:19:39,589 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -700032000, now seen corresponding path program 7 times [2022-03-20 07:19:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423449673] [2022-03-20 07:19:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:39,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:39,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448806658] [2022-03-20 07:19:39,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 07:19:39,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:39,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:39,601 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) [2022-03-20 07:19:39,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 07:19:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:19:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 07:19:40,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 07:19:40,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:41,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:41,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423449673] [2022-03-20 07:19:41,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:41,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448806658] [2022-03-20 07:19:41,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448806658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:41,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:41,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 07:19:41,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785940887] [2022-03-20 07:19:41,109 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:41,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 07:19:41,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 07:19:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 07:19:41,110 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 07:19:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:41,282 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-03-20 07:19:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 07:19:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-03-20 07:19:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:41,283 INFO L225 Difference]: With dead ends: 105 [2022-03-20 07:19:41,283 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 07:19:41,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-20 07:19:41,284 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:41,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:19:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 07:19:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 07:19:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 07:19:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-20 07:19:41,288 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 85 [2022-03-20 07:19:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:41,289 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-20 07:19:41,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 07:19:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-20 07:19:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 07:19:41,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:41,290 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:41,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:41,496 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 [2022-03-20 07:19:41,496 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1583078814, now seen corresponding path program 8 times [2022-03-20 07:19:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:41,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164665807] [2022-03-20 07:19:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:41,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800896561] [2022-03-20 07:19:41,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:19:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:41,506 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) [2022-03-20 07:19:41,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 07:19:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:19:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 07:19:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 07:19:42,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:42,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:42,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164665807] [2022-03-20 07:19:42,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800896561] [2022-03-20 07:19:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800896561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:42,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:42,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 07:19:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052763877] [2022-03-20 07:19:42,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:42,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 07:19:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 07:19:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 07:19:42,839 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 07:19:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:43,030 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-03-20 07:19:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 07:19:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-03-20 07:19:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:43,031 INFO L225 Difference]: With dead ends: 104 [2022-03-20 07:19:43,031 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 07:19:43,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 07:19:43,032 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:43,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 614 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:19:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 07:19:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 07:19:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 07:19:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-03-20 07:19:43,035 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-03-20 07:19:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:43,035 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-03-20 07:19:43,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 07:19:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-03-20 07:19:43,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 07:19:43,036 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:43,036 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:43,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:43,242 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 [2022-03-20 07:19:43,243 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -6495940, now seen corresponding path program 9 times [2022-03-20 07:19:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297827367] [2022-03-20 07:19:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:43,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361050009] [2022-03-20 07:19:43,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 07:19:43,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:43,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:43,253 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) [2022-03-20 07:19:43,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 07:19:44,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-20 07:19:44,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:44,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 07:19:44,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 07:19:44,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297827367] [2022-03-20 07:19:44,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361050009] [2022-03-20 07:19:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361050009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:44,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:44,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 07:19:44,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128649865] [2022-03-20 07:19:44,714 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:44,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 07:19:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 07:19:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-20 07:19:44,716 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 07:19:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:44,916 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-20 07:19:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 07:19:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 101 [2022-03-20 07:19:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:44,917 INFO L225 Difference]: With dead ends: 106 [2022-03-20 07:19:44,917 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 07:19:44,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-20 07:19:44,918 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:44,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 703 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:19:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 07:19:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 07:19:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 07:19:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-20 07:19:44,922 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 101 [2022-03-20 07:19:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:44,922 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-20 07:19:44,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 07:19:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-20 07:19:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 07:19:44,923 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:44,923 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:44,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 07:19:45,127 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 [2022-03-20 07:19:45,128 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1941577257, now seen corresponding path program 2 times [2022-03-20 07:19:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52365460] [2022-03-20 07:19:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:45,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800582623] [2022-03-20 07:19:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 07:19:45,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:45,138 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) [2022-03-20 07:19:45,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 07:19:45,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 07:19:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 07:19:45,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 07:19:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 07:19:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52365460] [2022-03-20 07:19:45,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:45,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800582623] [2022-03-20 07:19:45,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800582623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 07:19:45,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 07:19:45,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 07:19:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416859077] [2022-03-20 07:19:45,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:45,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 07:19:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 07:19:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 07:19:45,730 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2022-03-20 07:19:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:46,163 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2022-03-20 07:19:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 07:19:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) Word has length 103 [2022-03-20 07:19:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:46,165 INFO L225 Difference]: With dead ends: 262 [2022-03-20 07:19:46,165 INFO L226 Difference]: Without dead ends: 262 [2022-03-20 07:19:46,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 07:19:46,166 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 314 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:46,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 318 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:19:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-20 07:19:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2022-03-20 07:19:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 144 states have (on average 1.0902777777777777) internal successors, (157), 155 states have internal predecessors, (157), 38 states have call successors, (38), 26 states have call predecessors, (38), 24 states have return successors, (36), 25 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 07:19:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2022-03-20 07:19:46,173 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 103 [2022-03-20 07:19:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:46,173 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2022-03-20 07:19:46,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2022-03-20 07:19:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2022-03-20 07:19:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 07:19:46,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:46,175 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:46,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 07:19:46,387 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 [2022-03-20 07:19:46,387 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 526870234, now seen corresponding path program 10 times [2022-03-20 07:19:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:46,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640817366] [2022-03-20 07:19:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:46,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901919231] [2022-03-20 07:19:46,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 07:19:46,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:46,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:46,399 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) [2022-03-20 07:19:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 07:19:46,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 07:19:46,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:19:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 07:19:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:19:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 07:19:46,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:19:46,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:19:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640817366] [2022-03-20 07:19:46,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:19:46,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901919231] [2022-03-20 07:19:46,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901919231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:19:46,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:19:46,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 07:19:46,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258325920] [2022-03-20 07:19:46,938 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:19:46,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 07:19:46,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:19:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 07:19:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 07:19:46,939 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 07:19:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:19:47,172 INFO L93 Difference]: Finished difference Result 210 states and 233 transitions. [2022-03-20 07:19:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 07:19:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 109 [2022-03-20 07:19:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:19:47,174 INFO L225 Difference]: With dead ends: 210 [2022-03-20 07:19:47,174 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 07:19:47,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-20 07:19:47,174 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:19:47,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 798 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:19:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 07:19:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-03-20 07:19:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.0833333333333333) internal successors, (156), 154 states have internal predecessors, (156), 37 states have call successors, (37), 26 states have call predecessors, (37), 24 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 07:19:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2022-03-20 07:19:47,183 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 109 [2022-03-20 07:19:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:19:47,183 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2022-03-20 07:19:47,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 07:19:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2022-03-20 07:19:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 07:19:47,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:19:47,184 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:19:47,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 07:19:47,387 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 [2022-03-20 07:19:47,387 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:19:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:19:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash -451318152, now seen corresponding path program 11 times [2022-03-20 07:19:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:19:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054869445] [2022-03-20 07:19:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:19:47,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:19:47,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:19:47,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756767747] [2022-03-20 07:19:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 07:19:47,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:19:47,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:19:47,403 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) [2022-03-20 07:19:47,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 07:21:55,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 07:21:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 07:21:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 07:21:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:21:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 07:21:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:21:55,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:21:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054869445] [2022-03-20 07:21:55,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:21:55,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756767747] [2022-03-20 07:21:55,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756767747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:21:55,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:21:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 07:21:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353797087] [2022-03-20 07:21:55,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 07:21:55,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 07:21:55,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:21:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 07:21:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-20 07:21:55,996 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 07:21:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:21:56,254 INFO L93 Difference]: Finished difference Result 209 states and 230 transitions. [2022-03-20 07:21:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 07:21:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2022-03-20 07:21:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:21:56,256 INFO L225 Difference]: With dead ends: 209 [2022-03-20 07:21:56,256 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 07:21:56,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 07:21:56,257 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 07:21:56,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 899 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 07:21:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 07:21:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-20 07:21:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 144 states have (on average 1.0763888888888888) internal successors, (155), 153 states have internal predecessors, (155), 36 states have call successors, (36), 26 states have call predecessors, (36), 24 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 07:21:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 225 transitions. [2022-03-20 07:21:56,264 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 225 transitions. Word has length 117 [2022-03-20 07:21:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:21:56,264 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 225 transitions. [2022-03-20 07:21:56,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 07:21:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 225 transitions. [2022-03-20 07:21:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 07:21:56,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:21:56,265 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:21:56,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 07:21:56,475 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 [2022-03-20 07:21:56,476 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:21:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:21:56,476 INFO L85 PathProgramCache]: Analyzing trace with hash 974190614, now seen corresponding path program 12 times [2022-03-20 07:21:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:21:56,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382231079] [2022-03-20 07:21:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:21:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:21:56,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:21:56,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448354335] [2022-03-20 07:21:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 07:21:56,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:21:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:21:56,487 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) [2022-03-20 07:21:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process