/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:37:23,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:37:23,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:37:23,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:37:23,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:37:23,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:37:23,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:37:23,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:37:23,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:37:23,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:37:23,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:37:23,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:37:23,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:37:23,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:37:23,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:37:23,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:37:23,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:37:23,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:37:23,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:37:23,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:37:23,589 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:37:23,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:37:23,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:37:23,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:37:23,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:37:23,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:37:23,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:37:23,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:37:23,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:37:23,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:37:23,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:37:23,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:37:23,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:37:23,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:37:23,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:37:23,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:37:23,635 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:37:23,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:37:23,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:37:23,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:37:23,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:37:23,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:37:23,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:37:23,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:37:23,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:37:23,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:37:23,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:37:23,639 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:37:23,639 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:37:23,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:37:23,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:37:23,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:37:23,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:37:23,877 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:37:23,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-04-05 07:37:23,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcaed5c1c/61f9ed16f9024bb992101efa521c3bc7/FLAG8fd39328b [2022-04-05 07:37:24,299 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:37:24,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-04-05 07:37:24,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcaed5c1c/61f9ed16f9024bb992101efa521c3bc7/FLAG8fd39328b [2022-04-05 07:37:24,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcaed5c1c/61f9ed16f9024bb992101efa521c3bc7 [2022-04-05 07:37:24,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:37:24,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:37:24,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:37:24,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:37:24,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:37:24,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:37:24" (1/1) ... [2022-04-05 07:37:24,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@690f37e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:24, skipping insertion in model container [2022-04-05 07:37:24,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:37:24" (1/1) ... [2022-04-05 07:37:24,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:37:24,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:37:24,970 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/egcd2-ll_valuebound20.c[490,503] [2022-04-05 07:37:25,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:37:25,007 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:37:25,018 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/egcd2-ll_valuebound20.c[490,503] [2022-04-05 07:37:25,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:37:25,045 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:37:25,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25 WrapperNode [2022-04-05 07:37:25,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:37:25,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:37:25,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:37:25,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:37:25,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:37:25,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:37:25,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:37:25,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:37:25,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:37:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:25,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 07:37:25,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 07:37:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:37:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:37:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:37:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:37:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:37:25,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:37:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:37:25,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:37:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:37:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:37:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:37:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:37:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:37:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:37:25,193 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:37:25,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:37:25,386 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:37:25,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:37:25,393 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 07:37:25,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:37:25 BoogieIcfgContainer [2022-04-05 07:37:25,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:37:25,395 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:37:25,396 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:37:25,398 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:37:25,400 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:37:25" (1/1) ... [2022-04-05 07:37:25,401 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:37:25,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:37:25 BasicIcfg [2022-04-05 07:37:25,425 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:37:25,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:37:25,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:37:25,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:37:25,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:37:24" (1/4) ... [2022-04-05 07:37:25,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d42288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:37:25, skipping insertion in model container [2022-04-05 07:37:25,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:37:25" (2/4) ... [2022-04-05 07:37:25,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d42288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:37:25, skipping insertion in model container [2022-04-05 07:37:25,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:37:25" (3/4) ... [2022-04-05 07:37:25,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d42288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:37:25, skipping insertion in model container [2022-04-05 07:37:25,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:37:25" (4/4) ... [2022-04-05 07:37:25,434 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.cqvasr [2022-04-05 07:37:25,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:37:25,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:37:25,477 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:37:25,483 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:37:25,483 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:37:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 07:37:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 07:37:25,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:25,501 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:25,501 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-04-05 07:37:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489051997] [2022-04-05 07:37:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:37:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:37:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 07:37:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 07:37:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 07:37:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-05 07:37:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-05 07:37:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:37:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:25,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489051997] [2022-04-05 07:37:25,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489051997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:37:25,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:37:25,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:37:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274752736] [2022-04-05 07:37:25,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:37:25,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:37:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:37:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:37:25,734 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:37:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:25,821 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-05 07:37:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:37:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-05 07:37:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:25,828 INFO L225 Difference]: With dead ends: 73 [2022-04-05 07:37:25,828 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 07:37:25,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:37:25,833 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:25,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:37:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 07:37:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 07:37:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:37:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-05 07:37:25,870 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-05 07:37:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:25,871 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-05 07:37:25,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:37:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-05 07:37:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 07:37:25,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:25,874 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:25,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:37:25,874 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:25,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-04-05 07:37:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:25,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354484584] [2022-04-05 07:37:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:25,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472456291] [2022-04-05 07:37:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:25,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:25,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:25,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:37:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:37:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:37:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:37:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:26,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354484584] [2022-04-05 07:37:26,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472456291] [2022-04-05 07:37:26,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472456291] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:26,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:26,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-05 07:37:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971624992] [2022-04-05 07:37:26,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:26,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:37:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:37:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:37:26,257 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:37:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:26,387 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-05 07:37:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:37:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-05 07:37:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:26,389 INFO L225 Difference]: With dead ends: 52 [2022-04-05 07:37:26,389 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 07:37:26,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:37:26,390 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:26,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 152 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:37:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 07:37:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-05 07:37:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:37:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-05 07:37:26,397 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-05 07:37:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:26,397 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-05 07:37:26,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 07:37:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-05 07:37:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 07:37:26,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:26,398 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:26,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:26,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:26,599 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-04-05 07:37:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256941585] [2022-04-05 07:37:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:26,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946421650] [2022-04-05 07:37:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:26,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:26,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:26,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:37:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 07:37:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:37:26,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:37:26,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:26,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256941585] [2022-04-05 07:37:26,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:26,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946421650] [2022-04-05 07:37:26,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946421650] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:26,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:26,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:37:26,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318689822] [2022-04-05 07:37:26,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:37:26,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:37:26,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:37:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:37:26,888 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 07:37:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:26,941 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-04-05 07:37:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:37:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-05 07:37:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:26,942 INFO L225 Difference]: With dead ends: 43 [2022-04-05 07:37:26,942 INFO L226 Difference]: Without dead ends: 41 [2022-04-05 07:37:26,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:37:26,943 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:26,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:37:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-05 07:37:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-05 07:37:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 07:37:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-04-05 07:37:26,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-04-05 07:37:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:26,949 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-04-05 07:37:26,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-05 07:37:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-04-05 07:37:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 07:37:26,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:26,950 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:26,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:27,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 07:37:27,169 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-04-05 07:37:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:27,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465512074] [2022-04-05 07:37:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:27,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:27,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:27,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358873574] [2022-04-05 07:37:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:27,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:37:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 07:37:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 07:37:27,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:27,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465512074] [2022-04-05 07:37:27,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358873574] [2022-04-05 07:37:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358873574] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:27,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:27,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 07:37:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735222223] [2022-04-05 07:37:27,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:27,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 07:37:27,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 07:37:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:37:27,544 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:37:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:27,676 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-04-05 07:37:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:37:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-05 07:37:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:27,684 INFO L225 Difference]: With dead ends: 54 [2022-04-05 07:37:27,684 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 07:37:27,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:37:27,687 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:27,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 168 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:37:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 07:37:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-05 07:37:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:37:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-04-05 07:37:27,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-04-05 07:37:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:27,702 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-04-05 07:37:27,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:37:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-04-05 07:37:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 07:37:27,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:27,704 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:27,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:27,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:27,904 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-04-05 07:37:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745041745] [2022-04-05 07:37:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:27,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681892220] [2022-04-05 07:37:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:27,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:27,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:37:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 07:37:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 07:37:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 07:37:28,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745041745] [2022-04-05 07:37:28,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681892220] [2022-04-05 07:37:28,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681892220] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:28,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:28,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:37:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709535215] [2022-04-05 07:37:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:37:28,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:37:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:37:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:37:28,245 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:37:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:28,294 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-04-05 07:37:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:37:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-04-05 07:37:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:28,295 INFO L225 Difference]: With dead ends: 58 [2022-04-05 07:37:28,295 INFO L226 Difference]: Without dead ends: 56 [2022-04-05 07:37:28,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:37:28,296 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:28,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:37:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-05 07:37:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-05 07:37:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:37:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-05 07:37:28,309 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-04-05 07:37:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:28,309 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-05 07:37:28,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:37:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-05 07:37:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-05 07:37:28,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:28,315 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:28,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:28,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:28,527 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-04-05 07:37:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661114190] [2022-04-05 07:37:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:28,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358017510] [2022-04-05 07:37:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:28,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:37:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 07:37:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-05 07:37:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661114190] [2022-04-05 07:37:28,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358017510] [2022-04-05 07:37:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358017510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:28,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:28,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 07:37:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014863844] [2022-04-05 07:37:28,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:28,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:37:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:37:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:37:28,840 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-05 07:37:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:28,935 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-04-05 07:37:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 07:37:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-05 07:37:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:28,936 INFO L225 Difference]: With dead ends: 62 [2022-04-05 07:37:28,936 INFO L226 Difference]: Without dead ends: 60 [2022-04-05 07:37:28,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:37:28,937 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:28,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:37:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-05 07:37:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-05 07:37:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-05 07:37:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-05 07:37:28,958 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-04-05 07:37:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:28,959 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-05 07:37:28,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-05 07:37:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-05 07:37:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 07:37:28,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:28,959 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:28,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:29,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:29,176 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-04-05 07:37:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:29,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731572164] [2022-04-05 07:37:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:29,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523905109] [2022-04-05 07:37:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:29,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:29,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:29,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:29,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:37:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:37:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-05 07:37:29,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-05 07:37:29,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731572164] [2022-04-05 07:37:29,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523905109] [2022-04-05 07:37:29,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523905109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:29,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:29,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:37:29,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64500547] [2022-04-05 07:37:29,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:29,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:37:29,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:37:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:37:29,510 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-05 07:37:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:29,640 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-05 07:37:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:37:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-05 07:37:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:29,642 INFO L225 Difference]: With dead ends: 106 [2022-04-05 07:37:29,642 INFO L226 Difference]: Without dead ends: 98 [2022-04-05 07:37:29,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:37:29,643 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:29,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:37:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-05 07:37:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-05 07:37:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-05 07:37:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-05 07:37:29,661 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-05 07:37:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:29,661 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-05 07:37:29,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-05 07:37:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-05 07:37:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-05 07:37:29,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:29,663 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:29,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:29,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:29,879 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-04-05 07:37:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:29,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277827067] [2022-04-05 07:37:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:29,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23232626] [2022-04-05 07:37:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:29,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:29,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:29,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:37:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 07:37:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 07:37:30,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-05 07:37:30,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277827067] [2022-04-05 07:37:30,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23232626] [2022-04-05 07:37:30,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23232626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:30,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:30,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-05 07:37:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993467083] [2022-04-05 07:37:30,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:30,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 07:37:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 07:37:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:37:30,189 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:37:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:30,437 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-04-05 07:37:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:37:30,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-04-05 07:37:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:30,441 INFO L225 Difference]: With dead ends: 132 [2022-04-05 07:37:30,441 INFO L226 Difference]: Without dead ends: 128 [2022-04-05 07:37:30,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-05 07:37:30,442 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:30,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 303 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:37:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-05 07:37:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-04-05 07:37:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 07:37:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-04-05 07:37:30,456 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-04-05 07:37:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:30,456 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-04-05 07:37:30,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-05 07:37:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-04-05 07:37:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-05 07:37:30,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:30,457 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:30,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:30,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:30,674 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-04-05 07:37:30,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282961211] [2022-04-05 07:37:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:30,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:30,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779118747] [2022-04-05 07:37:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:37:30,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:30,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:30,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:37:30,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:37:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:37:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 07:37:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-05 07:37:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-05 07:37:31,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282961211] [2022-04-05 07:37:31,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779118747] [2022-04-05 07:37:31,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779118747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:31,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:31,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-04-05 07:37:31,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476047608] [2022-04-05 07:37:31,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:31,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 07:37:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 07:37:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:37:31,325 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 07:37:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:32,807 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-04-05 07:37:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 07:37:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-04-05 07:37:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:32,808 INFO L225 Difference]: With dead ends: 128 [2022-04-05 07:37:32,808 INFO L226 Difference]: Without dead ends: 126 [2022-04-05 07:37:32,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:37:32,809 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:32,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 213 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 07:37:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-05 07:37:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-04-05 07:37:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 07:37:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-04-05 07:37:32,830 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-04-05 07:37:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:32,831 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-04-05 07:37:32,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-05 07:37:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-04-05 07:37:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-05 07:37:32,835 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:32,835 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:32,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-05 07:37:33,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 07:37:33,041 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-04-05 07:37:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:33,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153190674] [2022-04-05 07:37:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:33,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:33,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:33,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655104535] [2022-04-05 07:37:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:37:33,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:33,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:33,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:37:33,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 07:37:33,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:37:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 07:37:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-05 07:37:33,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153190674] [2022-04-05 07:37:33,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655104535] [2022-04-05 07:37:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655104535] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:33,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:33,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 07:37:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801689877] [2022-04-05 07:37:33,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:33,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:37:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:37:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:37:33,506 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-05 07:37:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:33,742 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-04-05 07:37:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:37:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-04-05 07:37:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:33,744 INFO L225 Difference]: With dead ends: 144 [2022-04-05 07:37:33,744 INFO L226 Difference]: Without dead ends: 142 [2022-04-05 07:37:33,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:37:33,745 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:33,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:37:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-05 07:37:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-04-05 07:37:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 07:37:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-04-05 07:37:33,761 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-04-05 07:37:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:33,761 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-04-05 07:37:33,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-05 07:37:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-04-05 07:37:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 07:37:33,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:33,762 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:33,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 07:37:33,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:37:33,971 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-04-05 07:37:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380308202] [2022-04-05 07:37:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:33,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:33,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42977887] [2022-04-05 07:37:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:33,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:33,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:33,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:37:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 07:37:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-05 07:37:34,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-05 07:37:34,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380308202] [2022-04-05 07:37:34,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42977887] [2022-04-05 07:37:34,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42977887] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:34,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:34,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-05 07:37:34,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368218838] [2022-04-05 07:37:34,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:34,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 07:37:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 07:37:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:37:34,713 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:37:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:36,967 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-04-05 07:37:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 07:37:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-04-05 07:37:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:36,969 INFO L225 Difference]: With dead ends: 228 [2022-04-05 07:37:36,969 INFO L226 Difference]: Without dead ends: 220 [2022-04-05 07:37:36,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-04-05 07:37:36,970 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:36,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 318 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-05 07:37:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-05 07:37:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-04-05 07:37:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 07:37:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-04-05 07:37:37,010 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-04-05 07:37:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:37,010 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-04-05 07:37:37,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:37:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-04-05 07:37:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 07:37:37,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:37,011 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:37,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:37,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 07:37:37,212 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-04-05 07:37:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065604365] [2022-04-05 07:37:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:37,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:37,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040036556] [2022-04-05 07:37:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:37,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:37,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:37,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:37,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:37:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:37:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-05 07:37:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-05 07:37:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 27 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-04-05 07:37:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065604365] [2022-04-05 07:37:39,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040036556] [2022-04-05 07:37:39,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040036556] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:39,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:39,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-04-05 07:37:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493136384] [2022-04-05 07:37:39,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:39,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 07:37:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 07:37:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-05 07:37:39,376 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-04-05 07:37:43,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:37:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:45,736 INFO L93 Difference]: Finished difference Result 231 states and 312 transitions. [2022-04-05 07:37:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 07:37:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) Word has length 107 [2022-04-05 07:37:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:45,739 INFO L225 Difference]: With dead ends: 231 [2022-04-05 07:37:45,739 INFO L226 Difference]: Without dead ends: 227 [2022-04-05 07:37:45,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-04-05 07:37:45,740 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 63 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 116 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:45,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 260 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-04-05 07:37:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-05 07:37:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-04-05 07:37:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 118 states have internal predecessors, (138), 81 states have call successors, (81), 20 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 07:37:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2022-04-05 07:37:45,792 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 298 transitions. Word has length 107 [2022-04-05 07:37:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:45,792 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 298 transitions. [2022-04-05 07:37:45,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-04-05 07:37:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 298 transitions. [2022-04-05 07:37:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-05 07:37:45,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:45,794 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:45,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:46,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 07:37:46,011 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1614224774, now seen corresponding path program 2 times [2022-04-05 07:37:46,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:46,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274294879] [2022-04-05 07:37:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:46,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:46,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712542735] [2022-04-05 07:37:46,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:37:46,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:46,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:46,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 07:37:46,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:37:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:37:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:37:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-05 07:37:46,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:37:46,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274294879] [2022-04-05 07:37:46,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712542735] [2022-04-05 07:37:46,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712542735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:37:46,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:37:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:37:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396122082] [2022-04-05 07:37:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:37:46,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:37:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:37:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:37:46,209 INFO L87 Difference]: Start difference. First operand 218 states and 298 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-05 07:37:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:46,300 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2022-04-05 07:37:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:37:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-04-05 07:37:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:46,301 INFO L225 Difference]: With dead ends: 281 [2022-04-05 07:37:46,301 INFO L226 Difference]: Without dead ends: 199 [2022-04-05 07:37:46,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:37:46,302 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:46,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:37:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-05 07:37:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-04-05 07:37:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-05 07:37:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-04-05 07:37:46,322 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 116 [2022-04-05 07:37:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:46,323 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-04-05 07:37:46,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-05 07:37:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-04-05 07:37:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-05 07:37:46,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:46,324 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:46,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:46,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 07:37:46,550 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2022-04-05 07:37:46,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96958803] [2022-04-05 07:37:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:46,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:46,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218962319] [2022-04-05 07:37:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:37:46,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:46,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 07:37:46,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 07:37:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:37:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 07:37:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-05 07:37:47,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:47,689 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:37:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96958803] [2022-04-05 07:37:47,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:47,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218962319] [2022-04-05 07:37:47,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218962319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 07:37:47,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:37:47,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 07:37:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730385376] [2022-04-05 07:37:47,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:47,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 07:37:47,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:47,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 07:37:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:37:47,863 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:37:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:37:48,620 INFO L93 Difference]: Finished difference Result 198 states and 260 transitions. [2022-04-05 07:37:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 07:37:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2022-04-05 07:37:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:37:48,622 INFO L225 Difference]: With dead ends: 198 [2022-04-05 07:37:48,622 INFO L226 Difference]: Without dead ends: 193 [2022-04-05 07:37:48,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-04-05 07:37:48,622 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 07:37:48,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 389 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 07:37:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-05 07:37:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-04-05 07:37:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 69 states have call successors, (69), 19 states have call predecessors, (69), 17 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-05 07:37:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2022-04-05 07:37:48,664 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 138 [2022-04-05 07:37:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:37:48,665 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2022-04-05 07:37:48,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:37:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2022-04-05 07:37:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-05 07:37:48,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:37:48,666 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:37:48,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 07:37:48,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 07:37:48,879 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:37:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:37:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 4 times [2022-04-05 07:37:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:37:48,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075768853] [2022-04-05 07:37:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:37:48,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:37:48,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:37:48,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104634313] [2022-04-05 07:37:48,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 07:37:48,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:37:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:37:48,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:37:48,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 07:37:48,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 07:37:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:37:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-05 07:37:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:37:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-04-05 07:37:49,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:37:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-04-05 07:37:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:37:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075768853] [2022-04-05 07:37:52,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:37:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104634313] [2022-04-05 07:37:52,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104634313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:37:52,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:37:52,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2022-04-05 07:37:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539756543] [2022-04-05 07:37:52,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:37:52,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 07:37:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:37:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 07:37:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-04-05 07:37:52,172 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-04-05 07:38:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:38:23,478 INFO L93 Difference]: Finished difference Result 297 states and 416 transitions. [2022-04-05 07:38:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 07:38:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) Word has length 157 [2022-04-05 07:38:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:38:23,481 INFO L225 Difference]: With dead ends: 297 [2022-04-05 07:38:23,482 INFO L226 Difference]: Without dead ends: 291 [2022-04-05 07:38:23,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 07:38:23,485 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 100 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:38:23,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 373 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-04-05 07:38:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-05 07:38:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 259. [2022-04-05 07:38:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 105 states have call successors, (105), 22 states have call predecessors, (105), 20 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-05 07:38:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2022-04-05 07:38:23,581 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 157 [2022-04-05 07:38:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:38:23,581 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2022-04-05 07:38:23,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-04-05 07:38:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2022-04-05 07:38:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-05 07:38:23,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:38:23,584 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:38:23,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 07:38:23,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:23,803 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:38:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:38:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 5 times [2022-04-05 07:38:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:38:23,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847733934] [2022-04-05 07:38:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:38:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:38:23,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:38:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912731866] [2022-04-05 07:38:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 07:38:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:38:23,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:38:23,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:38:23,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 07:38:23,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-05 07:38:23,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:38:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-05 07:38:23,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:38:24,927 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:24,930 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:26,566 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:26,570 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:26,573 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 127 proven. 157 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2022-04-05 07:38:27,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:38:29,608 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:38:37,352 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:39:03,178 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 07:39:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:39:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847733934] [2022-04-05 07:39:03,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:39:03,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912731866] [2022-04-05 07:39:03,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Infinite/NaN value [2022-04-05 07:39:03,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:39:03,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-04-05 07:39:03,183 ERROR L170 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2022-04-05 07:39:03,183 INFO L618 BasicCegarLoop]: Counterexample might be feasible [2022-04-05 07:39:03,188 INFO L788 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 07:39:03,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 07:39:03,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 07:39:03,408 INFO L719 BasicCegarLoop]: Path program histogram: [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:39:03,410 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 07:39:03,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:39:03 BasicIcfg [2022-04-05 07:39:03,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 07:39:03,422 INFO L158 Benchmark]: Toolchain (without parser) took 98668.72ms. Allocated memory was 204.5MB in the beginning and 274.7MB in the end (delta: 70.3MB). Free memory was 151.1MB in the beginning and 115.6MB in the end (delta: 35.5MB). Peak memory consumption was 105.7MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,422 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 204.5MB. Free memory is still 167.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 07:39:03,423 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.59ms. Allocated memory was 204.5MB in the beginning and 274.7MB in the end (delta: 70.3MB). Free memory was 151.0MB in the beginning and 250.8MB in the end (delta: -99.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,423 INFO L158 Benchmark]: Boogie Preprocessor took 34.49ms. Allocated memory is still 274.7MB. Free memory was 250.8MB in the beginning and 249.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,423 INFO L158 Benchmark]: RCFGBuilder took 312.21ms. Allocated memory is still 274.7MB. Free memory was 249.3MB in the beginning and 237.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,423 INFO L158 Benchmark]: IcfgTransformer took 29.16ms. Allocated memory is still 274.7MB. Free memory was 237.2MB in the beginning and 235.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,423 INFO L158 Benchmark]: TraceAbstraction took 97996.20ms. Allocated memory is still 274.7MB. Free memory was 235.1MB in the beginning and 115.6MB in the end (delta: 119.5MB). Peak memory consumption was 120.5MB. Max. memory is 8.0GB. [2022-04-05 07:39:03,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 204.5MB. Free memory is still 167.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 291.59ms. Allocated memory was 204.5MB in the beginning and 274.7MB in the end (delta: 70.3MB). Free memory was 151.0MB in the beginning and 250.8MB in the end (delta: -99.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.49ms. Allocated memory is still 274.7MB. Free memory was 250.8MB in the beginning and 249.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 312.21ms. Allocated memory is still 274.7MB. Free memory was 249.3MB in the beginning and 237.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 29.16ms. Allocated memory is still 274.7MB. Free memory was 237.2MB in the beginning and 235.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 97996.20ms. Allocated memory is still 274.7MB. Free memory was 235.1MB in the beginning and 115.6MB in the end (delta: 119.5MB). Peak memory consumption was 120.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=20) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=20) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=20) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=20) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L34] c = 0 [L35] k = 0 [L36] xy = (long long) x * y [L37] yy = (long long) y * y [L38] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(xy < 2147483647) [L39] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L39] RET assume_abort_if_not(yy < 2147483647) [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND TRUE !(b != 0) [L71] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 97.9s, OverallIterations: 16, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 43.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 542 SdHoareTripleChecker+Valid, 21.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 459 mSDsluCounter, 3242 SdHoareTripleChecker+Invalid, 20.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2533 mSDsCounter, 744 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5182 IncrementalHoareTripleChecker+Invalid, 5927 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 744 mSolverCounterUnsat, 709 mSDtfsCounter, 5182 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2040 GetRequests, 1786 SyntacticMatches, 16 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 25.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=15, InterpolantAutomatonStates: 173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 199 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 49.5s InterpolantComputationTime, 1375 NumberOfCodeBlocks, 1286 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 2073 ConstructedInterpolants, 3 QuantifiedInterpolants, 13596 SizeOfPredicates, 94 NumberOfNonLiveVariables, 3221 ConjunctsInSsa, 470 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 5672/6226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-04-05 07:39:03,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...