/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/cohendiv-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:51:15,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:51:15,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:51:15,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 06:51:15,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 06:51:15,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 06:51:15,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 06:51:15,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 06:51:15,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 06:51:15,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 06:51:15,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 06:51:15,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 06:51:15,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:51:15,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:51:15,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:51:15,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:51:15,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:51:15,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:51:15,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:51:15,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:51:15,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:51:15,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:51:15,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:51:15,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:51:15,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:51:15,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:51:15,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:51:15,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:51:15,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:51:15,438 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 06:51:15,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:51:15,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:51:15,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:51:15,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:51:15,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:51:15,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:51:15,454 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:51:15,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:51:15,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:51:15,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:51:15,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:51:15,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:51:15,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:51:15,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:51:15,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:51:15,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:51:15,458 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:51:15,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:51:15,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:51:15,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:51:15,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:51:15,616 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:51:15,616 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:51:15,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-04-05 06:51:15,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648ca2540/b62cd106e75f435dbd6c139a41220f4a/FLAGa48e932d8 [2022-04-05 06:51:16,026 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:51:16,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-04-05 06:51:16,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648ca2540/b62cd106e75f435dbd6c139a41220f4a/FLAGa48e932d8 [2022-04-05 06:51:16,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648ca2540/b62cd106e75f435dbd6c139a41220f4a [2022-04-05 06:51:16,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:51:16,477 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:51:16,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:51:16,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:51:16,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:51:16,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5e9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16, skipping insertion in model container [2022-04-05 06:51:16,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:51:16,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:51:16,598 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/cohendiv-ll_unwindbound100.c[576,589] [2022-04-05 06:51:16,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:51:16,635 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:51:16,642 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/cohendiv-ll_unwindbound100.c[576,589] [2022-04-05 06:51:16,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:51:16,658 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:51:16,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16 WrapperNode [2022-04-05 06:51:16,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:51:16,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:51:16,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:51:16,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:51:16,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:51:16,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:51:16,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:51:16,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:51:16,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:51:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:16,717 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 06:51:16,719 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 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:51:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:51:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:51:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:51:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:51:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:51:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 06:51:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:51:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:51:16,782 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:51:16,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:51:16,890 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:51:16,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:51:16,894 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 06:51:16,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:51:16 BoogieIcfgContainer [2022-04-05 06:51:16,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:51:16,896 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:51:16,896 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:51:16,897 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:51:16,899 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:51:16" (1/1) ... [2022-04-05 06:51:16,900 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:51:16,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:51:16 BasicIcfg [2022-04-05 06:51:16,913 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:51:16,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:51:16,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:51:16,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:51:16,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:51:16" (1/4) ... [2022-04-05 06:51:16,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:51:16, skipping insertion in model container [2022-04-05 06:51:16,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:51:16" (2/4) ... [2022-04-05 06:51:16,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:51:16, skipping insertion in model container [2022-04-05 06:51:16,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:51:16" (3/4) ... [2022-04-05 06:51:16,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbe2605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:51:16, skipping insertion in model container [2022-04-05 06:51:16,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:51:16" (4/4) ... [2022-04-05 06:51:16,918 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.cqvasr [2022-04-05 06:51:16,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:51:16,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:51:16,972 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:51:16,979 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 06:51:16,979 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:51:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 06:51:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 06:51:16,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:16,993 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:16,994 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-04-05 06:51:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:17,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569803158] [2022-04-05 06:51:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:51:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:17,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 06:51:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:51:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569803158] [2022-04-05 06:51:17,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569803158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:17,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:17,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 06:51:17,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534918625] [2022-04-05 06:51:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:17,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 06:51:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 06:51:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:51:17,137 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:51:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:17,234 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-04-05 06:51:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 06:51:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 06:51:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:17,242 INFO L225 Difference]: With dead ends: 68 [2022-04-05 06:51:17,243 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 06:51:17,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:51:17,250 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:17,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 06:51:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-05 06:51:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 06:51:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-04-05 06:51:17,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-04-05 06:51:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:17,298 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-04-05 06:51:17,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:51:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-04-05 06:51:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 06:51:17,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:17,299 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:17,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:51:17,300 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-04-05 06:51:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:17,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115052933] [2022-04-05 06:51:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:17,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725187123] [2022-04-05 06:51:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:17,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:17,346 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 06:51:17,400 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 06:51:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 06:51:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:51:17,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:17,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115052933] [2022-04-05 06:51:17,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725187123] [2022-04-05 06:51:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725187123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:17,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:17,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:51:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781646340] [2022-04-05 06:51:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:17,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:51:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:51:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:51:17,506 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 06:51:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:17,524 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-05 06:51:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:51:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-05 06:51:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:17,525 INFO L225 Difference]: With dead ends: 42 [2022-04-05 06:51:17,525 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 06:51:17,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:51:17,527 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:17,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 06:51:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 06:51:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 06:51:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 06:51:17,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-04-05 06:51:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:17,536 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 06:51:17,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 06:51:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 06:51:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 06:51:17,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:17,537 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:17,554 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 06:51:17,752 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 06:51:17,752 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:17,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:17,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-04-05 06:51:17,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23905037] [2022-04-05 06:51:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:17,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366653716] [2022-04-05 06:51:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:17,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:17,763 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 06:51:17,764 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 06:51:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:51:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:51:17,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23905037] [2022-04-05 06:51:17,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366653716] [2022-04-05 06:51:17,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366653716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:17,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:17,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:51:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327865304] [2022-04-05 06:51:17,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:17,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:51:17,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:51:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:51:17,844 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:51:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:17,873 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-04-05 06:51:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:51:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 06:51:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:17,874 INFO L225 Difference]: With dead ends: 45 [2022-04-05 06:51:17,874 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 06:51:17,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:51:17,875 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:17,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 145 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 06:51:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-05 06:51:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 06:51:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-05 06:51:17,881 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-04-05 06:51:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:17,882 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-05 06:51:17,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 06:51:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-05 06:51:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 06:51:17,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:17,883 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:17,899 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 06:51:18,098 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 06:51:18,099 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-04-05 06:51:18,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:18,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029261548] [2022-04-05 06:51:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:18,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:18,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536548265] [2022-04-05 06:51:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:18,115 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 06:51:18,117 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 06:51:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:51:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:51:18,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:18,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029261548] [2022-04-05 06:51:18,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536548265] [2022-04-05 06:51:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536548265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:18,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:18,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:51:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211012504] [2022-04-05 06:51:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:18,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:51:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:51:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:51:18,206 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:51:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:18,245 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-05 06:51:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:51:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 06:51:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:18,246 INFO L225 Difference]: With dead ends: 58 [2022-04-05 06:51:18,246 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 06:51:18,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:51:18,247 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:18,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 139 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 06:51:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-05 06:51:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 06:51:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-04-05 06:51:18,253 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-04-05 06:51:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:18,253 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-04-05 06:51:18,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 06:51:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-04-05 06:51:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 06:51:18,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:18,254 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:18,270 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 06:51:18,468 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 06:51:18,468 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-04-05 06:51:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694677270] [2022-04-05 06:51:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:18,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:18,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470835574] [2022-04-05 06:51:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:18,478 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 06:51:18,503 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 06:51:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:51:18,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:51:18,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:18,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:18,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694677270] [2022-04-05 06:51:18,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:18,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470835574] [2022-04-05 06:51:18,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470835574] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:18,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:18,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:51:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106077077] [2022-04-05 06:51:18,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:18,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:51:18,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:51:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:51:18,620 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 06:51:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:18,679 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-04-05 06:51:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:51:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-04-05 06:51:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:18,682 INFO L225 Difference]: With dead ends: 83 [2022-04-05 06:51:18,682 INFO L226 Difference]: Without dead ends: 81 [2022-04-05 06:51:18,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 06:51:18,683 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:18,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-05 06:51:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-04-05 06:51:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 06:51:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-04-05 06:51:18,702 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-04-05 06:51:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:18,703 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-04-05 06:51:18,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-05 06:51:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-04-05 06:51:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 06:51:18,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:18,704 INFO L499 BasicCegarLoop]: trace histogram [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 06:51:18,720 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 06:51:18,912 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 06:51:18,913 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-04-05 06:51:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:18,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393820936] [2022-04-05 06:51:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:18,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:18,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191900291] [2022-04-05 06:51:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:18,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:18,966 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 06:51:18,985 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 06:51:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 06:51:19,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 06:51:19,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:19,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:19,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393820936] [2022-04-05 06:51:19,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:19,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191900291] [2022-04-05 06:51:19,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191900291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:19,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:19,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 06:51:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77371051] [2022-04-05 06:51:19,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:19,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 06:51:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 06:51:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:51:19,093 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 06:51:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:19,114 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-04-05 06:51:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 06:51:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-04-05 06:51:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:19,116 INFO L225 Difference]: With dead ends: 113 [2022-04-05 06:51:19,116 INFO L226 Difference]: Without dead ends: 78 [2022-04-05 06:51:19,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:51:19,116 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:19,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-05 06:51:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-05 06:51:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 06:51:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-04-05 06:51:19,122 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-04-05 06:51:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:19,122 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-04-05 06:51:19,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 06:51:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-04-05 06:51:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:51:19,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:19,123 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:19,141 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 06:51:19,341 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 06:51:19,342 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-04-05 06:51:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95441884] [2022-04-05 06:51:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:19,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:19,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228475706] [2022-04-05 06:51:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:19,359 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 06:51:19,379 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 06:51:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:19,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:51:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 06:51:19,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:51:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95441884] [2022-04-05 06:51:19,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228475706] [2022-04-05 06:51:19,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228475706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:51:19,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:51:19,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 06:51:19,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222110689] [2022-04-05 06:51:19,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:51:19,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:51:19,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:51:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:51:19,499 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 06:51:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:19,568 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-04-05 06:51:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:51:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-04-05 06:51:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:19,569 INFO L225 Difference]: With dead ends: 84 [2022-04-05 06:51:19,569 INFO L226 Difference]: Without dead ends: 82 [2022-04-05 06:51:19,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:51:19,570 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:19,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 167 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:51:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-05 06:51:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-05 06:51:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 06:51:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-04-05 06:51:19,578 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-04-05 06:51:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:19,579 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-04-05 06:51:19,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 06:51:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-04-05 06:51:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 06:51:19,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:19,580 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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 06:51:19,597 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 06:51:19,791 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 06:51:19,791 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-04-05 06:51:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:19,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250421689] [2022-04-05 06:51:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:19,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758373596] [2022-04-05 06:51:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:19,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:19,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:19,808 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 06:51:19,816 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 06:51:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:51:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 06:51:19,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 06:51:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250421689] [2022-04-05 06:51:20,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:20,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758373596] [2022-04-05 06:51:20,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758373596] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:51:20,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:51:20,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 06:51:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306821650] [2022-04-05 06:51:20,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:20,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:51:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:20,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:51:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:51:20,087 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-05 06:51:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:20,194 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-04-05 06:51:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 06:51:20,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-04-05 06:51:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:20,196 INFO L225 Difference]: With dead ends: 88 [2022-04-05 06:51:20,196 INFO L226 Difference]: Without dead ends: 86 [2022-04-05 06:51:20,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-05 06:51:20,197 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:20,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 116 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-05 06:51:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-05 06:51:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 06:51:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-04-05 06:51:20,204 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-04-05 06:51:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:20,204 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-04-05 06:51:20,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-05 06:51:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-04-05 06:51:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 06:51:20,205 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:20,205 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-04-05 06:51:20,222 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 06:51:20,421 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 06:51:20,421 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:20,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-04-05 06:51:20,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:20,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719863828] [2022-04-05 06:51:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:20,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730382809] [2022-04-05 06:51:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:20,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:20,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:20,448 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 06:51:20,449 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 06:51:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:51:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 06:51:20,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 06:51:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:20,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719863828] [2022-04-05 06:51:20,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:20,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730382809] [2022-04-05 06:51:20,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730382809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:51:20,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:51:20,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 06:51:20,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013207904] [2022-04-05 06:51:20,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:20,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:51:20,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:51:20,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:51:20,682 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 06:51:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:20,795 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-04-05 06:51:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:51:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-04-05 06:51:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:20,797 INFO L225 Difference]: With dead ends: 257 [2022-04-05 06:51:20,797 INFO L226 Difference]: Without dead ends: 250 [2022-04-05 06:51:20,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:51:20,798 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:20,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-05 06:51:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-04-05 06:51:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-05 06:51:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-04-05 06:51:20,835 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-04-05 06:51:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:20,835 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-04-05 06:51:20,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-05 06:51:20,835 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-04-05 06:51:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 06:51:20,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:20,836 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-05 06:51:20,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:21,047 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 06:51:21,047 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-04-05 06:51:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472858151] [2022-04-05 06:51:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:21,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991928348] [2022-04-05 06:51:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:21,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:21,084 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 06:51:21,099 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 06:51:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:51:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 06:51:21,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:21,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472858151] [2022-04-05 06:51:21,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:21,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991928348] [2022-04-05 06:51:21,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991928348] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:51:21,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:51:21,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 06:51:21,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968082123] [2022-04-05 06:51:21,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:21,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 06:51:21,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 06:51:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-05 06:51:21,608 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-05 06:51:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:21,789 INFO L93 Difference]: Finished difference Result 318 states and 381 transitions. [2022-04-05 06:51:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 06:51:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-04-05 06:51:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:21,791 INFO L225 Difference]: With dead ends: 318 [2022-04-05 06:51:21,791 INFO L226 Difference]: Without dead ends: 203 [2022-04-05 06:51:21,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:51:21,792 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:21,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 181 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-05 06:51:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-04-05 06:51:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 06:51:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-04-05 06:51:21,802 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-04-05 06:51:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:21,802 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-04-05 06:51:21,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-05 06:51:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-04-05 06:51:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-05 06:51:21,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:21,803 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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 06:51:21,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 06:51:22,036 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 06:51:22,036 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-04-05 06:51:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072171159] [2022-04-05 06:51:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:22,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181523250] [2022-04-05 06:51:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:22,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:22,046 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 06:51:22,048 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 06:51:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 06:51:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 06:51:22,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 06:51:22,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:22,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072171159] [2022-04-05 06:51:22,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:22,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181523250] [2022-04-05 06:51:22,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181523250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:51:22,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:51:22,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 06:51:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105354540] [2022-04-05 06:51:22,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:22,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:51:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:22,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:51:22,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:51:22,318 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-05 06:51:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:22,453 INFO L93 Difference]: Finished difference Result 308 states and 368 transitions. [2022-04-05 06:51:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:51:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-04-05 06:51:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:22,457 INFO L225 Difference]: With dead ends: 308 [2022-04-05 06:51:22,457 INFO L226 Difference]: Without dead ends: 214 [2022-04-05 06:51:22,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:51:22,459 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:22,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:51:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-05 06:51:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-04-05 06:51:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-05 06:51:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-04-05 06:51:22,474 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-04-05 06:51:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:22,474 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-04-05 06:51:22,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-05 06:51:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-04-05 06:51:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 06:51:22,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:51:22,475 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:22,491 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 06:51:22,691 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 06:51:22,692 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:51:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:51:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-04-05 06:51:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:51:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244153851] [2022-04-05 06:51:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:51:22,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 06:51:22,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754401301] [2022-04-05 06:51:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:51:22,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:51:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:51:22,716 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 06:51:22,716 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 06:51:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:51:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 06:51:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:51:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 06:51:23,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:51:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-05 06:51:23,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:51:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244153851] [2022-04-05 06:51:23,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 06:51:23,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754401301] [2022-04-05 06:51:23,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754401301] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:51:23,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 06:51:23,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-04-05 06:51:23,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277491693] [2022-04-05 06:51:23,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 06:51:23,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 06:51:23,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:51:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 06:51:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-05 06:51:23,222 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-05 06:51:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:51:23,571 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-04-05 06:51:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 06:51:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-04-05 06:51:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:51:23,572 INFO L225 Difference]: With dead ends: 236 [2022-04-05 06:51:23,572 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 06:51:23,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-04-05 06:51:23,573 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:51:23,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 229 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:51:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 06:51:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 06:51:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 06:51:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 06:51:23,573 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-04-05 06:51:23,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:51:23,574 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 06:51:23,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-05 06:51:23,574 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 06:51:23,574 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 06:51:23,576 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 06:51:23,592 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 06:51:23,783 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 06:51:23,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 06:51:24,324 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 06:51:24,324 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 06:51:24,324 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 06:51:24,324 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 06:51:24,324 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-05 06:51:24,324 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 06:51:24,324 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L878 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-04-05 06:51:24,325 INFO L882 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,326 INFO L878 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,326 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,326 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-04-05 06:51:24,326 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-04-05 06:51:24,326 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-04-05 06:51:24,329 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:51:24,330 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 06:51:24,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:51:24 BasicIcfg [2022-04-05 06:51:24,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 06:51:24,339 INFO L158 Benchmark]: Toolchain (without parser) took 7861.85ms. Allocated memory was 229.6MB in the beginning and 314.6MB in the end (delta: 84.9MB). Free memory was 175.3MB in the beginning and 211.8MB in the end (delta: -36.5MB). Peak memory consumption was 48.9MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,339 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 229.6MB. Free memory was 191.7MB in the beginning and 191.6MB in the end (delta: 75.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 06:51:24,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.55ms. Allocated memory was 229.6MB in the beginning and 314.6MB in the end (delta: 84.9MB). Free memory was 175.1MB in the beginning and 288.3MB in the end (delta: -113.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,340 INFO L158 Benchmark]: Boogie Preprocessor took 18.08ms. Allocated memory is still 314.6MB. Free memory was 288.3MB in the beginning and 287.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,340 INFO L158 Benchmark]: RCFGBuilder took 210.68ms. Allocated memory is still 314.6MB. Free memory was 287.0MB in the beginning and 275.9MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,340 INFO L158 Benchmark]: IcfgTransformer took 17.06ms. Allocated memory is still 314.6MB. Free memory was 275.9MB in the beginning and 274.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,340 INFO L158 Benchmark]: TraceAbstraction took 7424.53ms. Allocated memory is still 314.6MB. Free memory was 273.8MB in the beginning and 211.8MB in the end (delta: 62.0MB). Peak memory consumption was 63.0MB. Max. memory is 8.0GB. [2022-04-05 06:51:24,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 229.6MB. Free memory was 191.7MB in the beginning and 191.6MB in the end (delta: 75.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.55ms. Allocated memory was 229.6MB in the beginning and 314.6MB in the end (delta: 84.9MB). Free memory was 175.1MB in the beginning and 288.3MB in the end (delta: -113.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.08ms. Allocated memory is still 314.6MB. Free memory was 288.3MB in the beginning and 287.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 210.68ms. Allocated memory is still 314.6MB. Free memory was 287.0MB in the beginning and 275.9MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.06ms. Allocated memory is still 314.6MB. Free memory was 275.9MB in the beginning and 274.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7424.53ms. Allocated memory is still 314.6MB. Free memory was 273.8MB in the beginning and 211.8MB in the end (delta: 62.0MB). Peak memory consumption was 63.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 1839 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1311 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1214 IncrementalHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 528 mSDtfsCounter, 1214 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 129 PreInvPairs, 200 NumberOfFragments, 250 HoareAnnotationTreeSize, 129 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2803 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-04-05 06:51:24,385 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...