/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/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 11:10:11,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 11:10:11,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 11:10:11,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 11:10:11,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 11:10:11,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 11:10:11,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 11:10:11,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 11:10:11,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 11:10:11,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 11:10:11,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 11:10:11,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 11:10:11,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 11:10:11,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 11:10:11,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 11:10:11,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 11:10:11,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 11:10:11,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 11:10:11,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 11:10:11,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 11:10:11,802 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 11:10:11,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 11:10:11,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 11:10:11,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 11:10:11,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 11:10:11,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 11:10:11,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 11:10:11,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 11:10:11,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 11:10:11,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 11:10:11,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 11:10:11,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 11:10:11,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 11:10:11,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 11:10:11,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 11:10:11,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 11:10:11,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 11:10:11,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 11:10:11,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 11:10:11,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 11:10:11,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 11:10:11,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 11:10:11,827 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 [2022-03-17 11:10:11,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 11:10:11,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 11:10:11,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 11:10:11,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 11:10:11,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 11:10:11,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 11:10:11,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 11:10:11,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 11:10:11,864 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 11:10:11,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 11:10:11,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 11:10:11,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 11:10:11,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 11:10:11,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 11:10:11,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 11:10:11,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 11:10:11,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 11:10:11,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 11:10:11,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:10:11,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 11:10:11,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 11:10:11,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 11:10:12,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 11:10:12,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 11:10:12,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 11:10:12,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 11:10:12,138 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 11:10:12,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-17 11:10:12,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf2751bd/01a33d9725894799b087ce1d74fc0bce/FLAGe7e64c4fb [2022-03-17 11:10:12,614 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 11:10:12,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-03-17 11:10:12,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf2751bd/01a33d9725894799b087ce1d74fc0bce/FLAGe7e64c4fb [2022-03-17 11:10:12,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cf2751bd/01a33d9725894799b087ce1d74fc0bce [2022-03-17 11:10:12,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 11:10:12,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 11:10:12,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 11:10:12,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 11:10:12,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 11:10:12,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5bcb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12, skipping insertion in model container [2022-03-17 11:10:12,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 11:10:12,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 11:10:12,846 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-17 11:10:12,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:10:12,870 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 11:10:12,889 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/bresenham-ll_unwindbound5.c[597,610] [2022-03-17 11:10:12,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 11:10:12,904 INFO L208 MainTranslator]: Completed translation [2022-03-17 11:10:12,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12 WrapperNode [2022-03-17 11:10:12,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 11:10:12,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 11:10:12,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 11:10:12,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 11:10:12,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 11:10:12,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 11:10:12,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 11:10:12,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 11:10:12,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (1/1) ... [2022-03-17 11:10:12,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 11:10:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:12,960 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) [2022-03-17 11:10:12,981 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 [2022-03-17 11:10:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 11:10:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 11:10:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 11:10:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 11:10:12,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 11:10:12,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 11:10:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 11:10:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 11:10:13,051 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 11:10:13,053 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 11:10:13,247 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 11:10:13,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 11:10:13,252 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 11:10:13,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:10:13 BoogieIcfgContainer [2022-03-17 11:10:13,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 11:10:13,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 11:10:13,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 11:10:13,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 11:10:13,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:10:12" (1/3) ... [2022-03-17 11:10:13,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e67050a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:10:13, skipping insertion in model container [2022-03-17 11:10:13,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:10:12" (2/3) ... [2022-03-17 11:10:13,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e67050a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:10:13, skipping insertion in model container [2022-03-17 11:10:13,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 11:10:13" (3/3) ... [2022-03-17 11:10:13,260 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2022-03-17 11:10:13,264 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 11:10:13,264 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 11:10:13,302 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 11:10:13,307 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 [2022-03-17 11:10:13,307 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 11:10:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:10:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 11:10:13,324 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:13,324 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:13,325 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-03-17 11:10:13,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:13,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162061518] [2022-03-17 11:10:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:13,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 11:10:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 11:10:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162061518] [2022-03-17 11:10:13,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162061518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:10:13,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:10:13,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 11:10:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852270296] [2022-03-17 11:10:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:10:13,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 11:10:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 11:10:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:10:13,582 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 11:10:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:13,655 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-17 11:10:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 11:10:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 11:10:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:13,666 INFO L225 Difference]: With dead ends: 45 [2022-03-17 11:10:13,667 INFO L226 Difference]: Without dead ends: 21 [2022-03-17 11:10:13,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 11:10:13,675 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:13,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:10:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-17 11:10:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-17 11:10:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 11:10:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-17 11:10:13,710 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-17 11:10:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:13,711 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-17 11:10:13,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 11:10:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-17 11:10:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-17 11:10:13,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:13,712 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:13,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 11:10:13,713 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:13,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-03-17 11:10:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:13,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460594011] [2022-03-17 11:10:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:13,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:13,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366060500] [2022-03-17 11:10:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:13,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:13,753 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) [2022-03-17 11:10:13,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 11:10:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 11:10:13,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 11:10:13,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 11:10:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460594011] [2022-03-17 11:10:13,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366060500] [2022-03-17 11:10:13,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366060500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 11:10:13,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 11:10:13,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 11:10:13,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106045141] [2022-03-17 11:10:13,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 11:10:13,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 11:10:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 11:10:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 11:10:13,939 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 11:10:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:14,004 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-17 11:10:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 11:10:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-17 11:10:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:14,006 INFO L225 Difference]: With dead ends: 34 [2022-03-17 11:10:14,006 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 11:10:14,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 11:10:14,008 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:14,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:10:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 11:10:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-17 11:10:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-03-17 11:10:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-17 11:10:14,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-17 11:10:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:14,015 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-17 11:10:14,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 11:10:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-17 11:10:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 11:10:14,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:14,017 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:14,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:14,231 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 [2022-03-17 11:10:14,232 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-03-17 11:10:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814556301] [2022-03-17 11:10:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:14,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:14,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433455024] [2022-03-17 11:10:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:14,255 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) [2022-03-17 11:10:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 11:10:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 11:10:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 11:10:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 11:10:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814556301] [2022-03-17 11:10:14,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433455024] [2022-03-17 11:10:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433455024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:14,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:14,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-17 11:10:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831417952] [2022-03-17 11:10:14,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:14,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 11:10:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 11:10:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:10:14,622 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 11:10:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:14,870 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-17 11:10:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 11:10:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-03-17 11:10:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:14,872 INFO L225 Difference]: With dead ends: 45 [2022-03-17 11:10:14,872 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 11:10:14,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-17 11:10:14,874 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:14,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 110 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 11:10:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 11:10:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-17 11:10:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 11:10:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-17 11:10:14,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-03-17 11:10:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:14,882 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-17 11:10:14,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 11:10:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-17 11:10:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 11:10:14,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:14,884 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:14,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:15,099 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 [2022-03-17 11:10:15,100 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-03-17 11:10:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83177554] [2022-03-17 11:10:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:15,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:15,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342552082] [2022-03-17 11:10:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:15,111 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) [2022-03-17 11:10:15,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 11:10:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 11:10:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 11:10:15,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 11:10:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:15,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83177554] [2022-03-17 11:10:15,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:15,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342552082] [2022-03-17 11:10:15,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342552082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:15,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:15,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 11:10:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398277698] [2022-03-17 11:10:15,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:15,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 11:10:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 11:10:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 11:10:15,305 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 11:10:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:15,374 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-03-17 11:10:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 11:10:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-03-17 11:10:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:15,376 INFO L225 Difference]: With dead ends: 77 [2022-03-17 11:10:15,376 INFO L226 Difference]: Without dead ends: 71 [2022-03-17 11:10:15,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 11:10:15,377 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:15,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 11:10:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-17 11:10:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-03-17 11:10:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:10:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-17 11:10:15,387 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-03-17 11:10:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:15,388 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-17 11:10:15,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 11:10:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-17 11:10:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 11:10:15,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:15,389 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:15,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:15,606 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 [2022-03-17 11:10:15,606 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-03-17 11:10:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:15,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124040162] [2022-03-17 11:10:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:15,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:15,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770104156] [2022-03-17 11:10:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:15,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:15,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:15,620 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) [2022-03-17 11:10:15,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 11:10:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 11:10:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 11:10:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 11:10:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:16,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124040162] [2022-03-17 11:10:16,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:16,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770104156] [2022-03-17 11:10:16,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770104156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:16,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:16,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-17 11:10:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459602276] [2022-03-17 11:10:16,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:16,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 11:10:16,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 11:10:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-17 11:10:16,499 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 11:10:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:17,063 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-03-17 11:10:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 11:10:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-17 11:10:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:17,065 INFO L225 Difference]: With dead ends: 85 [2022-03-17 11:10:17,065 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 11:10:17,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 11:10:17,066 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:17,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 173 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-03-17 11:10:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 11:10:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-17 11:10:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 11:10:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-03-17 11:10:17,079 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-03-17 11:10:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:17,080 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-03-17 11:10:17,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 11:10:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-03-17 11:10:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 11:10:17,081 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:17,081 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:17,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:17,304 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 [2022-03-17 11:10:17,304 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:17,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:17,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1565736524, now seen corresponding path program 1 times [2022-03-17 11:10:17,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:17,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657575597] [2022-03-17 11:10:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:17,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:17,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:17,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218877637] [2022-03-17 11:10:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:17,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:17,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:17,318 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) [2022-03-17 11:10:17,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 11:10:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 11:10:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:17,542 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:10:17,545 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:10:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 11:10:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-17 11:10:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657575597] [2022-03-17 11:10:18,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218877637] [2022-03-17 11:10:18,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218877637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:18,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:18,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-03-17 11:10:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145334226] [2022-03-17 11:10:18,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:18,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 11:10:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 11:10:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-17 11:10:18,307 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:10:20,530 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 [] [2022-03-17 11:10:24,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:10:26,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 11:10:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:29,014 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-03-17 11:10:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 11:10:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-03-17 11:10:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:29,016 INFO L225 Difference]: With dead ends: 96 [2022-03-17 11:10:29,016 INFO L226 Difference]: Without dead ends: 90 [2022-03-17 11:10:29,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=117, Invalid=433, Unknown=2, NotChecked=0, Total=552 [2022-03-17 11:10:29,017 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:29,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 3 Unknown, 0 Unchecked, 6.1s Time] [2022-03-17 11:10:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-17 11:10:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-17 11:10:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 11:10:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-03-17 11:10:29,033 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-03-17 11:10:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:29,033 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-03-17 11:10:29,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 11:10:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-03-17 11:10:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 11:10:29,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:29,035 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:29,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:29,235 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 [2022-03-17 11:10:29,235 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1425187914, now seen corresponding path program 1 times [2022-03-17 11:10:29,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:29,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751393699] [2022-03-17 11:10:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:29,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:29,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432789479] [2022-03-17 11:10:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:29,248 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) [2022-03-17 11:10:29,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 11:10:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 11:10:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 11:10:29,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 11:10:29,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 11:10:29,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751393699] [2022-03-17 11:10:29,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432789479] [2022-03-17 11:10:29,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432789479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:29,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:29,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-17 11:10:29,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284846529] [2022-03-17 11:10:29,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:29,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 11:10:29,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 11:10:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 11:10:29,687 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 11:10:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:29,836 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-03-17 11:10:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:10:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-03-17 11:10:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:29,838 INFO L225 Difference]: With dead ends: 97 [2022-03-17 11:10:29,838 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 11:10:29,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-17 11:10:29,839 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:29,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:10:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 11:10:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-03-17 11:10:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 11:10:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-03-17 11:10:29,858 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-03-17 11:10:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:29,858 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-03-17 11:10:29,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 11:10:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-03-17 11:10:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 11:10:29,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:29,865 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:29,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:30,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:30,089 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 2 times [2022-03-17 11:10:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:30,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352715847] [2022-03-17 11:10:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:30,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:30,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259925168] [2022-03-17 11:10:30,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 11:10:30,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:30,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:30,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:10:30,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 11:10:30,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 11:10:30,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 11:10:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 11:10:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 11:10:30,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 11:10:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 11:10:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 11:10:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352715847] [2022-03-17 11:10:30,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 11:10:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259925168] [2022-03-17 11:10:30,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259925168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 11:10:30,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 11:10:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 11:10:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526313317] [2022-03-17 11:10:30,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 11:10:30,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 11:10:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 11:10:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 11:10:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-17 11:10:30,580 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 11:10:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 11:10:30,748 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-03-17 11:10:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 11:10:30,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-03-17 11:10:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 11:10:30,750 INFO L225 Difference]: With dead ends: 108 [2022-03-17 11:10:30,750 INFO L226 Difference]: Without dead ends: 102 [2022-03-17 11:10:30,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-17 11:10:30,751 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 11:10:30,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 11:10:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-17 11:10:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-03-17 11:10:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 11:10:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-03-17 11:10:30,771 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-03-17 11:10:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 11:10:30,772 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-03-17 11:10:30,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 11:10:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-03-17 11:10:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 11:10:30,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 11:10:30,775 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 11:10:30,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 11:10:30,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:30,992 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 11:10:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 11:10:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -248152202, now seen corresponding path program 3 times [2022-03-17 11:10:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 11:10:30,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904895968] [2022-03-17 11:10:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 11:10:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 11:10:31,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 11:10:31,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606330144] [2022-03-17 11:10:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 11:10:31,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 11:10:31,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 11:10:31,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 11:10:31,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 11:10:31,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 11:10:31,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 11:10:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 11:10:31,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 11:10:31,829 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:10:31,834 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:10:31,836 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 11:10:35,234 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false