/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:11:29,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:11:29,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:11:29,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 00:11:29,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 00:11:29,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 00:11:29,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 00:11:29,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 00:11:29,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 00:11:29,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 00:11:29,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 00:11:29,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 00:11:29,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 00:11:29,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 00:11:29,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 00:11:29,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 00:11:29,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 00:11:29,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 00:11:29,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 00:11:29,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 00:11:29,742 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 00:11:29,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 00:11:29,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 00:11:29,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 00:11:29,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 00:11:29,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 00:11:29,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 00:11:29,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 00:11:29,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 00:11:29,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 00:11:29,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 00:11:29,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 00:11:29,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 00:11:29,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 00:11:29,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 00:11:29,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 00:11:29,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 00:11:29,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 00:11:29,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 00:11:29,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:11:29,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:11:29,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:11:29,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:11:29,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:11:29,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:11:29,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:11:29,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:11:29,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:11:29,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:11:29,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:11:29,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:11:29,787 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:11:29,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:11:29,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:11:29,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:11:29,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:11:29,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:11:29,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:11:29,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:11:29,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:11:30,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:11:30,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:11:30,004 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:11:30,004 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:11:30,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2022-03-20 00:11:30,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515e5121f/e6cdbfd4c8894ba1813340e708dffe50/FLAG1c578dd9e [2022-03-20 00:11:30,395 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:11:30,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound2.i [2022-03-20 00:11:30,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515e5121f/e6cdbfd4c8894ba1813340e708dffe50/FLAG1c578dd9e [2022-03-20 00:11:30,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515e5121f/e6cdbfd4c8894ba1813340e708dffe50 [2022-03-20 00:11:30,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:11:30,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:11:30,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:11:30,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:11:30,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:11:30,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e767ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30, skipping insertion in model container [2022-03-20 00:11:30,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:11:30,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:11:30,535 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/divbin2_valuebound2.i[951,964] [2022-03-20 00:11:30,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:11:30,549 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:11:30,560 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/divbin2_valuebound2.i[951,964] [2022-03-20 00:11:30,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:11:30,571 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:11:30,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30 WrapperNode [2022-03-20 00:11:30,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:11:30,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:11:30,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:11:30,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:11:30,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:11:30,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:11:30,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:11:30,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:11:30,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (1/1) ... [2022-03-20 00:11:30,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:11:30,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:30,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:11:30,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:11:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:11:30,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:11:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:11:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:11:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:11:30,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:11:30,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:11:30,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:11:30,711 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:11:30,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:11:30,859 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:11:30,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:11:30,864 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:11:30,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:11:30 BoogieIcfgContainer [2022-03-20 00:11:30,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:11:30,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:11:30,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:11:30,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:11:30,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:11:30" (1/3) ... [2022-03-20 00:11:30,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556e9696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:11:30, skipping insertion in model container [2022-03-20 00:11:30,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:11:30" (2/3) ... [2022-03-20 00:11:30,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556e9696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:11:30, skipping insertion in model container [2022-03-20 00:11:30,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:11:30" (3/3) ... [2022-03-20 00:11:30,883 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2022-03-20 00:11:30,907 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:11:30,907 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:11:30,960 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:11:30,965 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=PETRI_NET, 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 [2022-03-20 00:11:30,965 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:11:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 00:11:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 00:11:30,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:30,979 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:30,980 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2022-03-20 00:11:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631749942] [2022-03-20 00:11:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:11:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:31,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:11:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:31,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:31,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631749942] [2022-03-20 00:11:31,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631749942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:31,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:31,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:11:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724963391] [2022-03-20 00:11:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:31,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:11:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:11:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:11:31,244 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:31,302 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-03-20 00:11:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:11:31,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-03-20 00:11:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:31,315 INFO L225 Difference]: With dead ends: 51 [2022-03-20 00:11:31,316 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 00:11:31,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:11:31,323 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:31,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 00:11:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 00:11:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 00:11:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 00:11:31,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-03-20 00:11:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:31,366 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 00:11:31,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 00:11:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 00:11:31,367 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:31,367 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:31,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:11:31,367 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2022-03-20 00:11:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263932967] [2022-03-20 00:11:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:31,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:31,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:31,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647615517] [2022-03-20 00:11:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:31,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:31,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:11:31,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:11:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 00:11:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:31,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:11:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263932967] [2022-03-20 00:11:31,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647615517] [2022-03-20 00:11:31,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647615517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:31,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:31,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:11:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978286590] [2022-03-20 00:11:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:31,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:11:31,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:11:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:11:31,653 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:31,714 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-20 00:11:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:11:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 19 [2022-03-20 00:11:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:31,715 INFO L225 Difference]: With dead ends: 37 [2022-03-20 00:11:31,716 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 00:11:31,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:11:31,717 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:31,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 00:11:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 00:11:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:11:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-20 00:11:31,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-03-20 00:11:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:31,723 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-20 00:11:31,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-20 00:11:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 00:11:31,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:31,724 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] [2022-03-20 00:11:31,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:11:31,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:31,945 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2022-03-20 00:11:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:31,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175114107] [2022-03-20 00:11:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:31,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:31,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:31,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520317181] [2022-03-20 00:11:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:31,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:31,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:11:31,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:11:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:32,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 00:11:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175114107] [2022-03-20 00:11:32,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520317181] [2022-03-20 00:11:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520317181] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:11:32,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:11:32,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:11:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582212696] [2022-03-20 00:11:32,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:32,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:11:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:11:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:11:32,346 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:32,384 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 00:11:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:11:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 21 [2022-03-20 00:11:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:32,388 INFO L225 Difference]: With dead ends: 42 [2022-03-20 00:11:32,388 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 00:11:32,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:11:32,391 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:32,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-20 00:11:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 00:11:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 00:11:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 00:11:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-20 00:11:32,410 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 21 [2022-03-20 00:11:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:32,411 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-20 00:11:32,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 00:11:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-20 00:11:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 00:11:32,412 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:32,413 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:32,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:11:32,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:11:32,630 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2022-03-20 00:11:32,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820629423] [2022-03-20 00:11:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:32,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:32,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080181966] [2022-03-20 00:11:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:32,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:32,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:32,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:11:32,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:11:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:11:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:32,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:11:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:32,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820629423] [2022-03-20 00:11:32,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:32,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080181966] [2022-03-20 00:11:32,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080181966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:11:32,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:11:32,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:11:32,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250802519] [2022-03-20 00:11:32,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:11:32,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:11:32,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:11:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:11:32,744 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:11:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:32,764 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-03-20 00:11:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:11:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 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 27 [2022-03-20 00:11:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:32,765 INFO L225 Difference]: With dead ends: 51 [2022-03-20 00:11:32,765 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 00:11:32,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:11:32,768 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:32,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:11:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 00:11:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 00:11:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:11:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 00:11:32,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-03-20 00:11:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:32,781 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 00:11:32,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 00:11:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 00:11:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 00:11:32,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:32,792 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:32,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:11:32,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:32,993 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash 608527918, now seen corresponding path program 1 times [2022-03-20 00:11:32,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:32,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258038340] [2022-03-20 00:11:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:32,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:33,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:33,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102011018] [2022-03-20 00:11:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:33,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:33,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:11:33,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:11:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 00:11:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 00:11:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 00:11:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:11:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258038340] [2022-03-20 00:11:33,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:11:33,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102011018] [2022-03-20 00:11:33,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102011018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:11:33,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:11:33,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-20 00:11:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415660776] [2022-03-20 00:11:33,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:11:33,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:11:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:11:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:11:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:11:33,207 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:11:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:11:33,290 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-03-20 00:11:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:11:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-03-20 00:11:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:11:33,291 INFO L225 Difference]: With dead ends: 39 [2022-03-20 00:11:33,291 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 00:11:33,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:11:33,292 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:11:33,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:11:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 00:11:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 00:11:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 00:11:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-20 00:11:33,305 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2022-03-20 00:11:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:11:33,305 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-20 00:11:33,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 00:11:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-20 00:11:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 00:11:33,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:11:33,306 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:11:33,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:11:33,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:33,516 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:11:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:11:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2022-03-20 00:11:33,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:11:33,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164174325] [2022-03-20 00:11:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:33,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:11:33,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:11:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086190141] [2022-03-20 00:11:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:11:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:11:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:11:33,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:11:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:11:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:11:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 00:11:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:11:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 00:11:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:11:35,959 WARN L855 $PredicateComparison]: unable to prove that (= (mod c_main_~A~0 4294967296) (mod (+ (* (div (mod c_main_~b~0 4294967296) 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) is different from true [2022-03-20 00:11:52,986 WARN L232 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:12:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2022-03-20 00:12:33,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:12:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164174325] [2022-03-20 00:12:33,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:12:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086190141] [2022-03-20 00:12:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086190141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:12:33,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:12:33,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-20 00:12:33,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147747571] [2022-03-20 00:12:33,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:12:33,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:12:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:12:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:12:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=154, Unknown=10, NotChecked=26, Total=240 [2022-03-20 00:12:33,347 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 00:12:35,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:37,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:39,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:43,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:12:46,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:13:30,362 WARN L232 SmtUtils]: Spent 37.70s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:13:32,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:13:34,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:13:36,833 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_main_~r~0 4294967296)) (.cse2 (mod c_main_~A~0 4294967296)) (.cse6 (mod c_main_~b~0 4294967296)) (.cse4 (* c_main_~q~0 2))) (let ((.cse0 (= .cse2 (mod (+ (* (div .cse6 2) .cse4) c_main_~r~0) 4294967296))) (.cse1 (<= .cse6 .cse5))) (and (or .cse0 .cse1) (= .cse2 (mod (+ c_main_~r~0 (* c_main_~b~0 c_main_~q~0)) 4294967296)) .cse0 (<= .cse2 2) (let ((.cse3 (mod (* c_main_~b~0 2) 4294967296))) (or (not .cse1) (= .cse2 (mod (+ (* (div .cse3 2) .cse4) c_main_~r~0) 4294967296)) (<= .cse3 .cse5)))))) is different from false [2022-03-20 00:13:38,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:13:40,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:14:04,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:14:06,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:14:08,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:14:10,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:14:13,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:09,546 WARN L232 SmtUtils]: Spent 45.74s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:15:11,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:24,911 WARN L232 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:15:26,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 00:15:29,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:31,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:33,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:35,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:37,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:15:39,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:06,208 WARN L232 SmtUtils]: Spent 15.19s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:16:08,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:10,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:12,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:14,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 00:16:17,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:19,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:21,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:23,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:25,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:28,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:30,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:32,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:34,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:52,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:54,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:56,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:16:58,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:17:00,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:17:03,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:17:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:17:03,190 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-03-20 00:17:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 00:17:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-03-20 00:17:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:17:03,347 INFO L225 Difference]: With dead ends: 86 [2022-03-20 00:17:03,347 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 00:17:03,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 215.7s TimeCoverageRelationStatistics Valid=118, Invalid=361, Unknown=35, NotChecked=86, Total=600 [2022-03-20 00:17:03,348 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 88.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:17:03,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 183 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 40 Unknown, 45 Unchecked, 88.2s Time] [2022-03-20 00:17:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 00:17:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2022-03-20 00:17:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 00:17:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-20 00:17:03,358 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 29 [2022-03-20 00:17:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:17:03,358 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-20 00:17:03,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 00:17:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-20 00:17:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 00:17:03,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:17:03,361 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:17:03,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:17:03,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:17:03,568 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:17:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:17:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1554731686, now seen corresponding path program 2 times [2022-03-20 00:17:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:17:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308097578] [2022-03-20 00:17:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:17:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:17:03,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:17:03,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742568186] [2022-03-20 00:17:03,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:17:03,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:17:03,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:17:03,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:17:03,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process