/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:28:30,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:28:30,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:28:30,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:28:30,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:28:30,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:28:30,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:28:30,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:28:30,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:28:30,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:28:30,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:28:30,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:28:30,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:28:30,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:28:30,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:28:30,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:28:30,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:28:30,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:28:30,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:28:30,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:28:30,949 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 [2021-05-02 14:28:30,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:28:30,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:28:30,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:28:30,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:28:30,978 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:28:30,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:28:30,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:28:30,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:28:30,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:28:30,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:28:30,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:28:30,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:28:30,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:28:30,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:28:30,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:28:30,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:28:30,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:28:31,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:28:31,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:28:31,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:28:31,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:28:31,254 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:28:31,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-02 14:28:31,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902f571d/df3a7c89b9ce43e29770166b7993aa47/FLAG45da45b4b [2021-05-02 14:28:31,616 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:28:31,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2021-05-02 14:28:31,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902f571d/df3a7c89b9ce43e29770166b7993aa47/FLAG45da45b4b [2021-05-02 14:28:32,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0902f571d/df3a7c89b9ce43e29770166b7993aa47 [2021-05-02 14:28:32,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:28:32,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:28:32,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:28:32,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:28:32,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:28:32,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f398ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32, skipping insertion in model container [2021-05-02 14:28:32,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:28:32,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:28:32,148 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-02 14:28:32,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:28:32,166 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:28:32,193 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i[959,972] [2021-05-02 14:28:32,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:28:32,219 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:28:32,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32 WrapperNode [2021-05-02 14:28:32,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:28:32,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:28:32,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:28:32,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:28:32,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... [2021-05-02 14:28:32,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:28:32,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:28:32,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:28:32,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:28:32,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:28:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:28:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:28:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:28:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:28:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:28:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:28:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:28:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:28:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:28:32,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:28:32,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:28:32,524 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:28:32,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:28:32 BoogieIcfgContainer [2021-05-02 14:28:32,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:28:32,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:28:32,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:28:32,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:28:32,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:28:32" (1/3) ... [2021-05-02 14:28:32,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7e861e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:28:32, skipping insertion in model container [2021-05-02 14:28:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:28:32" (2/3) ... [2021-05-02 14:28:32,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7e861e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:28:32, skipping insertion in model container [2021-05-02 14:28:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:28:32" (3/3) ... [2021-05-02 14:28:32,530 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2021-05-02 14:28:32,538 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:28:32,540 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:28:32,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:28:32,570 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:28:32,570 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:28:32,570 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:28:32,570 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:28:32,570 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:28:32,570 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:28:32,570 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:28:32,570 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:28:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-05-02 14:28:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 14:28:32,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:32,610 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:32,610 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:32,614 INFO L82 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2021-05-02 14:28:32,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:32,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741990874] [2021-05-02 14:28:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:32,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:28:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:32,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:32,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741990874] [2021-05-02 14:28:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741990874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:32,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:32,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:28:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296843263] [2021-05-02 14:28:32,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:28:32,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:28:32,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:32,801 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-05-02 14:28:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:32,879 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 14:28:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:28:32,880 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 [2021-05-02 14:28:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:32,887 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:28:32,887 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 14:28:32,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 14:28:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 14:28:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-05-02 14:28:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-02 14:28:32,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-02 14:28:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:32,918 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-02 14:28:32,919 INFO L481 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) [2021-05-02 14:28:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-02 14:28:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 14:28:32,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:32,920 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:32,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:28:32,920 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:32,921 INFO L82 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2021-05-02 14:28:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:32,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371153417] [2021-05-02 14:28:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:33,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:28:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:33,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:33,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371153417] [2021-05-02 14:28:33,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371153417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:33,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:33,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:28:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061321118] [2021-05-02 14:28:33,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:33,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:33,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:33,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:33,040 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2021-05-02 14:28:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:33,149 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 14:28:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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 14 [2021-05-02 14:28:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:33,152 INFO L225 Difference]: With dead ends: 35 [2021-05-02 14:28:33,152 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 14:28:33,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 14:28:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 14:28:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 14:28:33,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-02 14:28:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:33,161 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 14:28:33,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 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) [2021-05-02 14:28:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 14:28:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 14:28:33,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:33,163 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:33,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:28:33,164 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2021-05-02 14:28:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:33,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282337562] [2021-05-02 14:28:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:33,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:33,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019716619] [2021-05-02 14:28:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:28:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:33,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:33,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282337562] [2021-05-02 14:28:33,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:33,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019716619] [2021-05-02 14:28:33,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019716619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:33,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:33,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:28:33,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362450613] [2021-05-02 14:28:33,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:33,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:33,369 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 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) [2021-05-02 14:28:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:33,386 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 14:28:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:28:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 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 15 [2021-05-02 14:28:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:33,387 INFO L225 Difference]: With dead ends: 34 [2021-05-02 14:28:33,387 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 14:28:33,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 14:28:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 14:28:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-05-02 14:28:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-02 14:28:33,391 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-02 14:28:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:33,391 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-02 14:28:33,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 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) [2021-05-02 14:28:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-02 14:28:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 14:28:33,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:33,392 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:33,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:28:33,611 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:33,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2021-05-02 14:28:33,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:33,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607217338] [2021-05-02 14:28:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:33,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:33,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44181425] [2021-05-02 14:28:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:33,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:28:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:33,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:33,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:33,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607217338] [2021-05-02 14:28:33,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44181425] [2021-05-02 14:28:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44181425] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:33,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:33,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:28:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218656332] [2021-05-02 14:28:33,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:33,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:33,751 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-05-02 14:28:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:33,792 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-02 14:28:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2021-05-02 14:28:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:33,793 INFO L225 Difference]: With dead ends: 35 [2021-05-02 14:28:33,793 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:28:33,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:28:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:28:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2021-05-02 14:28:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 14:28:33,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-02 14:28:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:33,797 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 14:28:33,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-05-02 14:28:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 14:28:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:28:33,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:33,798 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:34,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,017 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2021-05-02 14:28:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:34,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240019121] [2021-05-02 14:28:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:34,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:34,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133094529] [2021-05-02 14:28:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:28:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240019121] [2021-05-02 14:28:34,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133094529] [2021-05-02 14:28:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133094529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:34,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:34,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:28:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458305429] [2021-05-02 14:28:34,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:28:34,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:28:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:28:34,169 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 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) [2021-05-02 14:28:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:34,214 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-05-02 14:28:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 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 17 [2021-05-02 14:28:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:34,215 INFO L225 Difference]: With dead ends: 46 [2021-05-02 14:28:34,215 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:28:34,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:28:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:28:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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) [2021-05-02 14:28:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 14:28:34,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-02 14:28:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:34,220 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 14:28:34,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 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) [2021-05-02 14:28:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 14:28:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:28:34,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:34,220 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:34,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,427 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2021-05-02 14:28:34,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:34,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957038939] [2021-05-02 14:28:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:34,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:34,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864983477] [2021-05-02 14:28:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:28:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:34,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:34,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:34,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957038939] [2021-05-02 14:28:34,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:34,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864983477] [2021-05-02 14:28:34,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864983477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:34,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:34,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:28:34,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704999471] [2021-05-02 14:28:34,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:34,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:34,567 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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) [2021-05-02 14:28:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:34,604 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-02 14:28:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:28:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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 18 [2021-05-02 14:28:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:34,606 INFO L225 Difference]: With dead ends: 46 [2021-05-02 14:28:34,606 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:28:34,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:28:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 14:28:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-05-02 14:28:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-02 14:28:34,621 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-02 14:28:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:34,621 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-02 14:28:34,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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) [2021-05-02 14:28:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-02 14:28:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:28:34,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:34,622 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:34,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,833 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2021-05-02 14:28:34,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:34,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928864995] [2021-05-02 14:28:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:34,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:34,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665516902] [2021-05-02 14:28:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:28:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928864995] [2021-05-02 14:28:34,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665516902] [2021-05-02 14:28:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665516902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:34,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:34,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:28:34,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884732945] [2021-05-02 14:28:34,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:34,980 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-02 14:28:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:35,038 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 14:28:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 18 [2021-05-02 14:28:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:35,040 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:28:35,040 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 14:28:35,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 14:28:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-02 14:28:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:28:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-02 14:28:35,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-02 14:28:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:35,049 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-02 14:28:35,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-05-02 14:28:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-02 14:28:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:28:35,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:35,049 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:35,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:28:35,257 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2021-05-02 14:28:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:35,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93735279] [2021-05-02 14:28:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:35,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:35,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035384188] [2021-05-02 14:28:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:28:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:35,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93735279] [2021-05-02 14:28:35,343 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035384188] [2021-05-02 14:28:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035384188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:28:35,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:28:35,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:28:35,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482992861] [2021-05-02 14:28:35,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:28:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:28:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:35,345 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:35,361 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-05-02 14:28:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:28:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-02 14:28:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:35,364 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:28:35,364 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:28:35,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:28:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:28:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:28:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-05-02 14:28:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-02 14:28:35,375 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-02 14:28:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:35,375 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-02 14:28:35,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-02 14:28:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:28:35,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:35,378 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:35,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:35,584 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 1 times [2021-05-02 14:28:35,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:35,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688877473] [2021-05-02 14:28:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:35,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:35,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010595414] [2021-05-02 14:28:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:28:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:35,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:35,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688877473] [2021-05-02 14:28:35,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:35,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010595414] [2021-05-02 14:28:35,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010595414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:35,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:35,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:28:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022858153] [2021-05-02 14:28:35,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:28:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:28:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:35,706 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:35,740 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-05-02 14:28:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:28:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 14:28:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:35,741 INFO L225 Difference]: With dead ends: 60 [2021-05-02 14:28:35,741 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 14:28:35,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:28:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 14:28:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-02 14:28:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:28:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-02 14:28:35,744 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-02 14:28:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:35,744 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-02 14:28:35,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-02 14:28:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:28:35,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:35,745 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:35,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:35,964 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 1 times [2021-05-02 14:28:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551161344] [2021-05-02 14:28:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:35,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:35,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856861733] [2021-05-02 14:28:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:28:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:36,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:36,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551161344] [2021-05-02 14:28:36,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:36,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856861733] [2021-05-02 14:28:36,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856861733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:36,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:36,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:28:36,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968737379] [2021-05-02 14:28:36,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:28:36,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:36,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:28:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:28:36,191 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:36,335 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-05-02 14:28:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:28:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-02 14:28:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:36,336 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:28:36,336 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 14:28:36,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:28:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 14:28:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-05-02 14:28:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:28:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-02 14:28:36,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 27 [2021-05-02 14:28:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:36,344 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-02 14:28:36,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-02 14:28:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:28:36,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:36,344 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:36,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 14:28:36,549 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2046623859, now seen corresponding path program 1 times [2021-05-02 14:28:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:36,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622242001] [2021-05-02 14:28:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:36,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:36,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056651033] [2021-05-02 14:28:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:28:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:28:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:28:36,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622242001] [2021-05-02 14:28:36,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:36,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056651033] [2021-05-02 14:28:36,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056651033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:36,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:36,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:28:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804276907] [2021-05-02 14:28:36,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:36,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:36,651 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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) [2021-05-02 14:28:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:36,677 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2021-05-02 14:28:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:28:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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) Word has length 29 [2021-05-02 14:28:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:36,678 INFO L225 Difference]: With dead ends: 76 [2021-05-02 14:28:36,678 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:28:36,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:28:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:28:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 14:28:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:28:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 14:28:36,682 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2021-05-02 14:28:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:36,682 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 14:28:36,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 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) [2021-05-02 14:28:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 14:28:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 14:28:36,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:36,683 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:36,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:36,893 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1080461875, now seen corresponding path program 2 times [2021-05-02 14:28:36,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:36,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467251463] [2021-05-02 14:28:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:36,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:36,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716788837] [2021-05-02 14:28:36,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:36,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:28:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:28:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:36,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:36,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:37,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467251463] [2021-05-02 14:28:37,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716788837] [2021-05-02 14:28:37,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716788837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:37,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:37,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:28:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607649500] [2021-05-02 14:28:37,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:28:37,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:28:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:28:37,024 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:37,068 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-05-02 14:28:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:28:37,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-05-02 14:28:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:37,069 INFO L225 Difference]: With dead ends: 81 [2021-05-02 14:28:37,069 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 14:28:37,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:28:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 14:28:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-05-02 14:28:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 54 states have internal predecessors, (65), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:28:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 14:28:37,077 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 30 [2021-05-02 14:28:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:37,077 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 14:28:37,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 14:28:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 14:28:37,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:37,079 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:37,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:37,289 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1082249335, now seen corresponding path program 2 times [2021-05-02 14:28:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:37,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430661865] [2021-05-02 14:28:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:37,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:37,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999796375] [2021-05-02 14:28:37,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:37,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:28:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:28:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:37,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:28:37,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430661865] [2021-05-02 14:28:37,513 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999796375] [2021-05-02 14:28:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999796375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:37,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:37,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:28:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052985827] [2021-05-02 14:28:37,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:28:37,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:37,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:28:37,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:28:37,514 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:37,636 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-05-02 14:28:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:28:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-05-02 14:28:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:37,637 INFO L225 Difference]: With dead ends: 95 [2021-05-02 14:28:37,637 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 14:28:37,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:28:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 14:28:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-05-02 14:28:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:28:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 14:28:37,643 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 30 [2021-05-02 14:28:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:37,643 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 14:28:37,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:28:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 14:28:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:28:37,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:37,644 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:37,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:28:37,857 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1417698711, now seen corresponding path program 3 times [2021-05-02 14:28:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:37,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212910143] [2021-05-02 14:28:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:37,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:37,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139067818] [2021-05-02 14:28:37,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:38,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:28:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 14:28:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:38,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:38,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:28:38,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212910143] [2021-05-02 14:28:38,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139067818] [2021-05-02 14:28:38,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139067818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:38,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:28:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698932795] [2021-05-02 14:28:38,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:28:38,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:28:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:38,877 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:28:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:38,910 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-05-02 14:28:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:28:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-05-02 14:28:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:38,913 INFO L225 Difference]: With dead ends: 104 [2021-05-02 14:28:38,914 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:28:38,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:28:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:28:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-05-02 14:28:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:28:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 14:28:38,918 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 36 [2021-05-02 14:28:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:38,918 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 14:28:38,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:28:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 14:28:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:28:38,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:38,919 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:39,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:28:39,126 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash 452880306, now seen corresponding path program 3 times [2021-05-02 14:28:39,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:39,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260016560] [2021-05-02 14:28:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:39,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:39,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980010533] [2021-05-02 14:28:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:39,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:28:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:28:39,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:39,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:39,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:39,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:39,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:39,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:28:40,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260016560] [2021-05-02 14:28:40,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980010533] [2021-05-02 14:28:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980010533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:40,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:40,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:28:40,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217328924] [2021-05-02 14:28:40,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:28:40,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:40,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:28:40,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:28:40,037 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:28:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:40,260 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 14:28:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:28:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-05-02 14:28:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:40,261 INFO L225 Difference]: With dead ends: 108 [2021-05-02 14:28:40,261 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 14:28:40,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:28:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 14:28:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-05-02 14:28:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.18) internal successors, (59), 51 states have internal predecessors, (59), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:28:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-05-02 14:28:40,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 39 [2021-05-02 14:28:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:40,265 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-05-02 14:28:40,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:28:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-05-02 14:28:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:28:40,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:40,265 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:40,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 14:28:40,469 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1559104567, now seen corresponding path program 2 times [2021-05-02 14:28:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:40,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940840790] [2021-05-02 14:28:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:40,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:40,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790755053] [2021-05-02 14:28:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:40,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:28:40,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:40,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:28:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 14:28:40,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:40,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940840790] [2021-05-02 14:28:40,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790755053] [2021-05-02 14:28:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790755053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:40,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:40,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:28:40,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677112835] [2021-05-02 14:28:40,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:28:40,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:28:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:28:40,598 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2021-05-02 14:28:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:40,630 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-02 14:28:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:28:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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) Word has length 41 [2021-05-02 14:28:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:40,632 INFO L225 Difference]: With dead ends: 96 [2021-05-02 14:28:40,632 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 14:28:40,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:28:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 14:28:40,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 14:28:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:28:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-05-02 14:28:40,635 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 41 [2021-05-02 14:28:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:40,636 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-05-02 14:28:40,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2021-05-02 14:28:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-05-02 14:28:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:28:40,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:28:40,637 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:28:40,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:40,852 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:28:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:28:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1179535091, now seen corresponding path program 4 times [2021-05-02 14:28:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:28:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587653617] [2021-05-02 14:28:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:28:40,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:28:40,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888854502] [2021-05-02 14:28:40,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:28:40,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:28:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:28:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:28:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:28:40,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:40,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:28:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 14:28:41,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:28:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587653617] [2021-05-02 14:28:41,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:28:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888854502] [2021-05-02 14:28:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888854502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:28:41,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:28:41,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:28:41,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978221685] [2021-05-02 14:28:41,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:28:41,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:28:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:28:41,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:28:41,011 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 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) [2021-05-02 14:28:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:28:41,041 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-05-02 14:28:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:28:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 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) Word has length 42 [2021-05-02 14:28:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:28:41,041 INFO L225 Difference]: With dead ends: 82 [2021-05-02 14:28:41,041 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:28:41,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:28:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:28:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:28:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:28:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:28:41,042 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-05-02 14:28:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:28:41,042 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:28:41,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 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) [2021-05-02 14:28:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:28:41,042 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:28:41,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:28:41,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:28:41,518 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-05-02 14:28:41,669 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-02 14:28:41,817 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 14:28:41,820 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:41,820 INFO L198 CegarLoopUtils]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 47) the Hoare annotation is: (let ((.cse2 (+ main_~r~0 main_~b~0)) (.cse9 (mod main_~A~0 4294967296))) (let ((.cse1 (< .cse9 4)) (.cse3 (* main_~r~0 4294967295)) (.cse4 (= main_~q~0 0)) (.cse6 (= main_~b~0 1)) (.cse5 (= main_~A~0 main_~r~0)) (.cse0 (<= 2 .cse9)) (.cse7 (= main_~q~0 1)) (.cse8 (= main_~A~0 .cse2))) (or (and .cse0 .cse1 (<= (mod main_~b~0 4294967296) (mod .cse2 4294967296)) (= (+ main_~r~0 main_~b~0 2) main_~A~0) (= main_~q~0 3) (= main_~b~0 (div (mod (+ main_~A~0 .cse3 (* main_~b~0 4294967295)) 4294967296) 2))) (and .cse0 (= main_~A~0 (+ main_~r~0 2)) .cse1 (= main_~b~0 (div (mod (+ main_~A~0 .cse3) 4294967296) 2)) (= main_~q~0 2)) (and (<= 1 (mod main_~r~0 4294967296)) .cse4 .cse5) (and .cse6 .cse7 .cse8) (and .cse4 .cse6 .cse5) (not (= |old(~counter~0)| 0)) (and .cse0 .cse7 .cse8)))) [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse3 (mod main_~r~0 4294967296))) (let ((.cse2 (<= 2 .cse3)) (.cse0 (= main_~q~0 0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 (<= 3 ~counter~0) .cse2) (and .cse0 (= main_~b~0 4) .cse1 .cse2 (<= 2 ~counter~0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) .cse0 .cse1 (= main_~b~0 2) (<= (mod main_~B~0 4294967296) .cse3) .cse4) (and .cse0 .cse1 (= main_~B~0 main_~b~0) (= ~counter~0 |old(~counter~0)|) .cse4) (not (= |old(~counter~0)| 0))))) [2021-05-02 14:28:41,821 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 26 50) the Hoare annotation is: (or (not (= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse11 (mod main_~r~0 4294967296)) (.cse12 (+ main_~r~0 main_~b~0))) (let ((.cse0 (mod .cse12 4294967296)) (.cse8 (= main_~B~0 main_~b~0)) (.cse2 (= main_~q~0 1)) (.cse3 (= main_~A~0 .cse12)) (.cse10 (<= 2 .cse11)) (.cse4 (<= 5 ~counter~0)) (.cse5 (= main_~q~0 0)) (.cse6 (= main_~A~0 main_~r~0)) (.cse7 (< .cse11 (mod main_~b~0 4294967296))) (.cse1 (= main_~b~0 2)) (.cse9 (= main_~B~0 1))) (or (and (<= 2 .cse0) .cse1 .cse2 (< .cse0 4) .cse3 .cse4) (and .cse5 .cse6 .cse7 .cse8 (<= ~counter~0 2) .cse9) (and (<= 4 ~counter~0) .cse5 (= main_~b~0 4) .cse6 .cse7 .cse10) (not (= |old(~counter~0)| 0)) (and (<= ~counter~0 4) (< .cse0 2) .cse8 .cse2 .cse3 .cse9) (and .cse5 .cse6 .cse10 .cse4) (and .cse5 .cse6 .cse7 .cse1 (<= ~counter~0 3) (<= (mod main_~B~0 4294967296) .cse11) .cse9)))) [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-05-02 14:28:41,821 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-05-02 14:28:41,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:28:41 BoogieIcfgContainer [2021-05-02 14:28:41,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:28:41,831 INFO L168 Benchmark]: Toolchain (without parser) took 9784.18 ms. Allocated memory was 224.4 MB in the beginning and 269.5 MB in the end (delta: 45.1 MB). Free memory was 189.3 MB in the beginning and 129.8 MB in the end (delta: 59.4 MB). Peak memory consumption was 105.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 224.4 MB. Free memory is still 205.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.82 ms. Allocated memory is still 224.4 MB. Free memory was 189.1 MB in the beginning and 207.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L168 Benchmark]: Boogie Preprocessor took 33.61 ms. Allocated memory is still 224.4 MB. Free memory was 207.0 MB in the beginning and 205.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L168 Benchmark]: RCFGBuilder took 270.42 ms. Allocated memory is still 224.4 MB. Free memory was 205.4 MB in the beginning and 190.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L168 Benchmark]: TraceAbstraction took 9304.98 ms. Allocated memory was 224.4 MB in the beginning and 269.5 MB in the end (delta: 45.1 MB). Free memory was 189.7 MB in the beginning and 129.8 MB in the end (delta: 59.9 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:28:41,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 224.4 MB. Free memory is still 205.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 169.82 ms. Allocated memory is still 224.4 MB. Free memory was 189.1 MB in the beginning and 207.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.61 ms. Allocated memory is still 224.4 MB. Free memory was 207.0 MB in the beginning and 205.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 270.42 ms. Allocated memory is still 224.4 MB. Free memory was 205.4 MB in the beginning and 190.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9304.98 ms. Allocated memory was 224.4 MB in the beginning and 269.5 MB in the end (delta: 45.1 MB). Free memory was 189.7 MB in the beginning and 129.8 MB in the end (delta: 59.9 MB). Peak memory consumption was 106.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8688.7ms, OverallIterations: 17, TraceHistogramMax: 4, EmptinessCheckTime: 31.4ms, AutomataDifference: 1156.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 562.2ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 441 SDtfs, 204 SDslu, 1441 SDs, 0 SdLazy, 944 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 643.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 423 GetRequests, 315 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 716.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=13, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 103.1ms AutomataMinimizationTime, 17 MinimizatonAttempts, 50 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 50 PreInvPairs, 67 NumberOfFragments, 403 HoareAnnotationTreeSize, 50 FomulaSimplifications, 625 FormulaSimplificationTreeSizeReduction, 83.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 585 FormulaSimplificationTreeSizeReductionInter, 470.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 94.5ms SsaConstructionTime, 1699.4ms SatisfiabilityAnalysisTime, 1816.0ms InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 417 ConstructedInterpolants, 0 QuantifiedInterpolants, 2042 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 87/181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((q == 0 && A == r) && 3 <= counter) && 2 <= r % 4294967296) || ((((q == 0 && b == 4) && A == r) && 2 <= r % 4294967296) && 2 <= counter)) || ((((((1 <= counter && counter <= 1) && q == 0) && A == r) && b == 2) && B % 4294967296 <= r % 4294967296) && B == 1)) || ((((q == 0 && A == r) && B == b) && counter == \old(counter)) && B == 1)) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...