/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/fermat1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:07:28,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:07:28,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:07:28,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:07:28,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:07:28,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:07:28,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:07:28,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:07:28,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:07:28,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:07:28,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:07:28,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:07:28,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:07:28,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:07:28,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:07:28,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:07:28,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:07:28,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:07:28,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:07:28,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:07:28,505 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 15:07:28,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:07:28,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:07:28,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:07:28,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:07:28,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:07:28,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:07:28,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:07:28,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:07:28,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:07:28,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:07:28,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:07:28,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:07:28,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:07:28,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:07:28,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:07:28,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:07:28,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:07:28,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:07:28,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:07:28,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:07:28,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:07:28,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:07:28,835 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:07:28,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2021-05-02 15:07:28,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0543b0ff/b92c918f402646bc9ead819aa11afc29/FLAG274bea4fa [2021-05-02 15:07:29,263 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:07:29,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound50.c [2021-05-02 15:07:29,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0543b0ff/b92c918f402646bc9ead819aa11afc29/FLAG274bea4fa [2021-05-02 15:07:29,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0543b0ff/b92c918f402646bc9ead819aa11afc29 [2021-05-02 15:07:29,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:07:29,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:07:29,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:07:29,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:07:29,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:07:29,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4622dbe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29, skipping insertion in model container [2021-05-02 15:07:29,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:07:29,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:07:29,811 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/fermat1-ll_valuebound50.c[535,548] [2021-05-02 15:07:29,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:07:29,826 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:07:29,833 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/fermat1-ll_valuebound50.c[535,548] [2021-05-02 15:07:29,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:07:29,846 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:07:29,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29 WrapperNode [2021-05-02 15:07:29,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:07:29,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:07:29,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:07:29,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:07:29,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (1/1) ... [2021-05-02 15:07:29,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:07:29,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:07:29,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:07:29,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:07:29,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (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 15:07:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:07:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:07:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:07:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:07:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:07:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:07:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:07:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:07:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:07:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:07:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:07:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:07:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:07:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:07:29,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:07:30,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:07:30,216 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:07:30,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:07:30 BoogieIcfgContainer [2021-05-02 15:07:30,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:07:30,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:07:30,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:07:30,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:07:30,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:07:29" (1/3) ... [2021-05-02 15:07:30,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e81cd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:07:30, skipping insertion in model container [2021-05-02 15:07:30,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:07:29" (2/3) ... [2021-05-02 15:07:30,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e81cd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:07:30, skipping insertion in model container [2021-05-02 15:07:30,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:07:30" (3/3) ... [2021-05-02 15:07:30,231 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound50.c [2021-05-02 15:07:30,234 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:07:30,236 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:07:30,249 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:07:30,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:07:30,270 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:07:30,270 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:07:30,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:07:30,271 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:07:30,271 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:07:30,271 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:07:30,271 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:07:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:07:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:07:30,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:30,285 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:30,285 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times [2021-05-02 15:07:30,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:30,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983925417] [2021-05-02 15:07:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:07:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:07:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:07:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:07:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:07:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:07:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983925417] [2021-05-02 15:07:30,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983925417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:07:30,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:07:30,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:07:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086082248] [2021-05-02 15:07:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:07:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:07:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:07:30,541 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:07:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:30,645 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2021-05-02 15:07:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:07:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:07:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:30,651 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:07:30,651 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:07:30,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:07:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:07:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:07:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:07:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 15:07:30,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 15:07:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:30,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 15:07:30,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:07:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 15:07:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:07:30,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:30,682 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:30,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:07:30,682 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times [2021-05-02 15:07:30,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:30,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699693280] [2021-05-02 15:07:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:30,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:30,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991993000] [2021-05-02 15:07:30,694 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 15:07:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:30,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:07:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:07:30,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:30,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699693280] [2021-05-02 15:07:30,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:30,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991993000] [2021-05-02 15:07:30,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991993000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:30,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:30,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:07:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464943213] [2021-05-02 15:07:30,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:07:30,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:07:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:07:30,962 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:07:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:39,200 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 15:07:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:07:39,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:07:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:39,202 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:07:39,202 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 15:07:39,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:07:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 15:07:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 15:07:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:07:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 15:07:39,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 15:07:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:39,212 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 15:07:39,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:07:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 15:07:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:07:39,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:39,213 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:39,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:07:39,431 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash 936002262, now seen corresponding path program 1 times [2021-05-02 15:07:39,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:39,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083571671] [2021-05-02 15:07:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:39,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:39,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144886773] [2021-05-02 15:07:39,440 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 15:07:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:07:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:39,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:07:39,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:39,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083571671] [2021-05-02 15:07:39,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144886773] [2021-05-02 15:07:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144886773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:39,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:39,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:07:39,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51529008] [2021-05-02 15:07:39,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:07:39,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:07:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:07:39,694 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:07:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:47,445 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-02 15:07:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:07:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:07:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:47,449 INFO L225 Difference]: With dead ends: 63 [2021-05-02 15:07:47,449 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:07:47,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:07:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:07:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 15:07:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:07:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 15:07:47,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 15:07:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:47,469 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 15:07:47,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:07:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 15:07:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:07:47,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:47,470 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:47,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:47,690 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash 584476005, now seen corresponding path program 1 times [2021-05-02 15:07:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:47,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513198680] [2021-05-02 15:07:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:47,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:47,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563019045] [2021-05-02 15:07:47,704 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 15:07:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:07:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:47,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,936 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:07:49,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:07:50,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:50,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513198680] [2021-05-02 15:07:50,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:50,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563019045] [2021-05-02 15:07:50,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563019045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:50,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:50,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:07:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195574998] [2021-05-02 15:07:50,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:07:50,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:07:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:07:50,105 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:07:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:53,013 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-02 15:07:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:07:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 15:07:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:53,014 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:07:53,014 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:07:53,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2134.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:07:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:07:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-05-02 15:07:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:07:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 15:07:53,025 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2021-05-02 15:07:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:53,026 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 15:07:53,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:07:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 15:07:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:07:53,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:53,027 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:53,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:53,228 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash -629102554, now seen corresponding path program 2 times [2021-05-02 15:07:53,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:53,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649318212] [2021-05-02 15:07:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:53,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:53,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078368948] [2021-05-02 15:07:53,237 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 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 15:07:53,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:07:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:07:53,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:07:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:53,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 15:07:53,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:53,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649318212] [2021-05-02 15:07:53,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:53,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078368948] [2021-05-02 15:07:53,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078368948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:53,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:53,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:07:53,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718530744] [2021-05-02 15:07:53,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:07:53,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:07:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:07:53,566 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:07:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:56,374 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2021-05-02 15:07:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:07:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 15:07:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:56,376 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:07:56,376 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:07:56,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:07:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:07:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-05-02 15:07:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:07:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-05-02 15:07:56,388 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 54 [2021-05-02 15:07:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:56,391 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-05-02 15:07:56,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:07:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-05-02 15:07:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:07:56,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:56,395 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:07:56,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:56,612 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1844116037, now seen corresponding path program 3 times [2021-05-02 15:07:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:56,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946581622] [2021-05-02 15:07:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:56,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:56,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253823136] [2021-05-02 15:07:56,623 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 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 15:07:56,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:07:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:07:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:07:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:56,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:07:57,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:57,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946581622] [2021-05-02 15:07:57,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:57,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253823136] [2021-05-02 15:07:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253823136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:57,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:07:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714112025] [2021-05-02 15:07:57,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:07:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:07:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:07:57,058 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:08:20,180 WARN L205 SmtUtils]: Spent 20.97 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 15:08:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:08:34,001 INFO L93 Difference]: Finished difference Result 215 states and 260 transitions. [2021-05-02 15:08:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:08:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 15:08:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:08:34,003 INFO L225 Difference]: With dead ends: 215 [2021-05-02 15:08:34,004 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 15:08:34,004 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 27330.0ms TimeCoverageRelationStatistics Valid=93, Invalid=457, Unknown=2, NotChecked=0, Total=552 [2021-05-02 15:08:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 15:08:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 169. [2021-05-02 15:08:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 123 states have internal predecessors, (127), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (38), 26 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 15:08:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2021-05-02 15:08:34,050 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 61 [2021-05-02 15:08:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:08:34,050 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2021-05-02 15:08:34,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:08:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2021-05-02 15:08:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:08:34,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:08:34,052 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:08:34,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:08:34,269 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:08:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:08:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1766314924, now seen corresponding path program 1 times [2021-05-02 15:08:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:08:34,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909538236] [2021-05-02 15:08:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:08:34,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:08:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91571141] [2021-05-02 15:08:34,278 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 15:08:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:08:34,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 15:08:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:08:34,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:34,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:44,581 WARN L205 SmtUtils]: Spent 8.03 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:08:44,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:50,659 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:08:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,961 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:08:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:08:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:04,209 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:09:23,981 WARN L205 SmtUtils]: Spent 9.56 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:09:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:23,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:09:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 38 refuted. 2 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 15:09:24,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:09:24,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909538236] [2021-05-02 15:09:24,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:09:24,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91571141] [2021-05-02 15:09:24,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91571141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:09:24,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:09:24,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:09:24,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780929980] [2021-05-02 15:09:24,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:09:24,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:09:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:09:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 15:09:24,029 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:10:05,437 WARN L205 SmtUtils]: Spent 10.29 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 15:10:17,554 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 15:10:35,788 WARN L205 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 15:12:08,701 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 15:12:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:12:40,212 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2021-05-02 15:12:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:12:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 75 [2021-05-02 15:12:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:12:40,215 INFO L225 Difference]: With dead ends: 254 [2021-05-02 15:12:40,215 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 15:12:40,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 96113.2ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 15:12:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 15:12:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 225. [2021-05-02 15:12:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 163 states have internal predecessors, (173), 53 states have call successors, (53), 23 states have call predecessors, (53), 22 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 15:12:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 278 transitions. [2021-05-02 15:12:40,246 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 278 transitions. Word has length 75 [2021-05-02 15:12:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:12:40,246 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 278 transitions. [2021-05-02 15:12:40,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:12:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 278 transitions. [2021-05-02 15:12:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 15:12:40,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:12:40,247 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:12:40,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:12:40,461 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:12:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:12:40,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1363450014, now seen corresponding path program 1 times [2021-05-02 15:12:40,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:12:40,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859498732] [2021-05-02 15:12:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:12:40,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:12:40,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373779899] [2021-05-02 15:12:40,468 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 15:12:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:12:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2021-05-02 15:12:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:12:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:12:40,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859498732] [2021-05-02 15:12:40,623 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373779899] [2021-05-02 15:12:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373779899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:12:40,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:12:40,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:12:40,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988025217] [2021-05-02 15:12:40,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:12:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:12:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:12:40,624 INFO L87 Difference]: Start difference. First operand 225 states and 278 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:12:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:12:40,662 INFO L93 Difference]: Finished difference Result 463 states and 590 transitions. [2021-05-02 15:12:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:12:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2021-05-02 15:12:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:12:40,664 INFO L225 Difference]: With dead ends: 463 [2021-05-02 15:12:40,664 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 15:12:40,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:12:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 15:12:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-05-02 15:12:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 190 states have (on average 1.1631578947368422) internal successors, (221), 195 states have internal predecessors, (221), 69 states have call successors, (69), 23 states have call predecessors, (69), 22 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 15:12:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 358 transitions. [2021-05-02 15:12:40,694 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 358 transitions. Word has length 82 [2021-05-02 15:12:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:12:40,694 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 358 transitions. [2021-05-02 15:12:40,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:12:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 358 transitions. [2021-05-02 15:12:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 15:12:40,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:12:40,695 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:12:40,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:12:40,910 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:12:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:12:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 590108599, now seen corresponding path program 2 times [2021-05-02 15:12:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:12:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125857642] [2021-05-02 15:12:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:12:40,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:12:40,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349628748] [2021-05-02 15:12:40,917 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 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 15:12:40,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:12:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:12:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:12:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:12:41,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 15:12:41,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125857642] [2021-05-02 15:12:41,305 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349628748] [2021-05-02 15:12:41,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349628748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:12:41,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:12:41,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:12:41,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787971618] [2021-05-02 15:12:41,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:12:41,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:41,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:12:41,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:12:41,307 INFO L87 Difference]: Start difference. First operand 282 states and 358 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 15:12:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:12:41,659 INFO L93 Difference]: Finished difference Result 477 states and 620 transitions. [2021-05-02 15:12:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:12:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 82 [2021-05-02 15:12:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:12:41,661 INFO L225 Difference]: With dead ends: 477 [2021-05-02 15:12:41,661 INFO L226 Difference]: Without dead ends: 319 [2021-05-02 15:12:41,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:12:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-02 15:12:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2021-05-02 15:12:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 219 states have internal predecessors, (246), 81 states have call successors, (81), 23 states have call predecessors, (81), 22 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2021-05-02 15:12:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 407 transitions. [2021-05-02 15:12:41,692 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 407 transitions. Word has length 82 [2021-05-02 15:12:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:12:41,692 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 407 transitions. [2021-05-02 15:12:41,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 15:12:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 407 transitions. [2021-05-02 15:12:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:12:41,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:12:41,693 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:12:41,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:12:41,909 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:12:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:12:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2089422831, now seen corresponding path program 1 times [2021-05-02 15:12:41,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:12:41,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215566242] [2021-05-02 15:12:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:12:41,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:12:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404226836] [2021-05-02 15:12:41,917 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 15:12:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:12:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 15:12:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:12:42,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 37 refuted. 4 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:12:44,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:44,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215566242] [2021-05-02 15:12:44,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:44,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404226836] [2021-05-02 15:12:44,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404226836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:12:44,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:12:44,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:12:44,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645481031] [2021-05-02 15:12:44,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:12:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:12:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 15:12:44,680 INFO L87 Difference]: Start difference. First operand 318 states and 407 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:13:22,263 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 15:13:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:30,616 INFO L93 Difference]: Finished difference Result 402 states and 511 transitions. [2021-05-02 15:13:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:13:30,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-05-02 15:13:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:30,634 INFO L225 Difference]: With dead ends: 402 [2021-05-02 15:13:30,634 INFO L226 Difference]: Without dead ends: 400 [2021-05-02 15:13:30,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 8280.2ms TimeCoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-05-02 15:13:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-02 15:13:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-05-02 15:13:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 271 states have (on average 1.151291512915129) internal successors, (312), 276 states have internal predecessors, (312), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 15:13:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 509 transitions. [2021-05-02 15:13:30,713 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 509 transitions. Word has length 89 [2021-05-02 15:13:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:30,713 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 509 transitions. [2021-05-02 15:13:30,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:13:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 509 transitions. [2021-05-02 15:13:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:13:30,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:30,715 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:30,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:30,929 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 844643163, now seen corresponding path program 2 times [2021-05-02 15:13:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:30,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962158477] [2021-05-02 15:13:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:30,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:30,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294909009] [2021-05-02 15:13:30,938 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 15:13:30,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:13:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:13:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:13:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-05-02 15:13:31,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962158477] [2021-05-02 15:13:31,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294909009] [2021-05-02 15:13:31,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294909009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:31,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:31,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 15:13:31,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145373947] [2021-05-02 15:13:31,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:13:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:13:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:13:31,123 INFO L87 Difference]: Start difference. First operand 400 states and 509 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:13:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:31,204 INFO L93 Difference]: Finished difference Result 689 states and 887 transitions. [2021-05-02 15:13:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:13:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-05-02 15:13:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:31,206 INFO L225 Difference]: With dead ends: 689 [2021-05-02 15:13:31,206 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 15:13:31,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:13:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 15:13:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 223. [2021-05-02 15:13:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 152 states have (on average 1.0986842105263157) internal successors, (167), 157 states have internal predecessors, (167), 44 states have call successors, (44), 27 states have call predecessors, (44), 26 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 15:13:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2021-05-02 15:13:31,227 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 89 [2021-05-02 15:13:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:31,228 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2021-05-02 15:13:31,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:13:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2021-05-02 15:13:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:13:31,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:31,229 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:31,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:31,434 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1542246767, now seen corresponding path program 3 times [2021-05-02 15:13:31,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:31,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390708956] [2021-05-02 15:13:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:31,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:31,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976983375] [2021-05-02 15:13:31,440 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 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 15:13:31,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:13:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:13:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:13:31,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:31,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 15:13:31,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390708956] [2021-05-02 15:13:31,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976983375] [2021-05-02 15:13:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976983375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:31,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:31,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:13:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837629478] [2021-05-02 15:13:31,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:13:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:13:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:13:31,700 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 15:13:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:35,880 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2021-05-02 15:13:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:13:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-02 15:13:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:35,882 INFO L225 Difference]: With dead ends: 237 [2021-05-02 15:13:35,882 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 15:13:35,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:13:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 15:13:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-05-02 15:13:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 161 states have (on average 1.093167701863354) internal successors, (176), 166 states have internal predecessors, (176), 44 states have call successors, (44), 30 states have call predecessors, (44), 29 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 15:13:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 263 transitions. [2021-05-02 15:13:35,903 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 263 transitions. Word has length 89 [2021-05-02 15:13:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:35,905 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 263 transitions. [2021-05-02 15:13:35,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 15:13:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 263 transitions. [2021-05-02 15:13:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 15:13:35,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:35,907 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:36,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:13:36,124 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1932866046, now seen corresponding path program 4 times [2021-05-02 15:13:36,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:36,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604011894] [2021-05-02 15:13:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:36,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426502205] [2021-05-02 15:13:36,143 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 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 15:13:36,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:13:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:13:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:13:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:55,032 WARN L205 SmtUtils]: Spent 18.79 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 15:13:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:55,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:55,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:55,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,594 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:14:00,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:00,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,221 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:14:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:06,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 38 proven. 39 refuted. 3 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-02 15:14:14,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:14,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604011894] [2021-05-02 15:14:14,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:14,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426502205] [2021-05-02 15:14:14,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426502205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:14,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:14,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:14:14,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134600036] [2021-05-02 15:14:14,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:14:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:14:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=88, Unknown=1, NotChecked=0, Total=110 [2021-05-02 15:14:14,953 INFO L87 Difference]: Start difference. First operand 235 states and 263 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 15:14:20,579 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:14:26,292 WARN L205 SmtUtils]: Spent 5.57 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:15:53,381 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 15:15:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:53,447 INFO L93 Difference]: Finished difference Result 298 states and 340 transitions. [2021-05-02 15:15:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:15:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2021-05-02 15:15:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:53,449 INFO L225 Difference]: With dead ends: 298 [2021-05-02 15:15:53,449 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 15:15:53,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66466.1ms TimeCoverageRelationStatistics Valid=53, Invalid=217, Unknown=2, NotChecked=0, Total=272 [2021-05-02 15:15:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 15:15:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-02 15:15:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 170 states have (on average 1.088235294117647) internal successors, (185), 176 states have internal predecessors, (185), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 15:15:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2021-05-02 15:15:53,469 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 103 [2021-05-02 15:15:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:53,469 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2021-05-02 15:15:53,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 15:15:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2021-05-02 15:15:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 15:15:53,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:53,470 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 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 15:15:53,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:15:53,685 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 185225293, now seen corresponding path program 5 times [2021-05-02 15:15:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591807488] [2021-05-02 15:15:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:53,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:53,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612236695] [2021-05-02 15:15:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 15:15:53,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 15:15:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:15:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 15:15:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 15:15:53,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:53,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591807488] [2021-05-02 15:15:53,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612236695] [2021-05-02 15:15:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612236695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:53,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:53,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:15:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019114657] [2021-05-02 15:15:53,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:15:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:15:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:15:53,986 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:15:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:54,231 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2021-05-02 15:15:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:15:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 110 [2021-05-02 15:15:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:54,235 INFO L225 Difference]: With dead ends: 320 [2021-05-02 15:15:54,235 INFO L226 Difference]: Without dead ends: 291 [2021-05-02 15:15:54,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:15:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-02 15:15:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 264. [2021-05-02 15:15:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 180 states have (on average 1.1055555555555556) internal successors, (199), 185 states have internal predecessors, (199), 55 states have call successors, (55), 29 states have call predecessors, (55), 28 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 15:15:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2021-05-02 15:15:54,284 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 110 [2021-05-02 15:15:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:54,284 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2021-05-02 15:15:54,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:15:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2021-05-02 15:15:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 15:15:54,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:54,285 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:54,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:15:54,498 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash 936499883, now seen corresponding path program 6 times [2021-05-02 15:15:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:54,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086701707] [2021-05-02 15:15:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:54,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:54,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758218237] [2021-05-02 15:15:54,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 15:15:54,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 15:15:54,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:15:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 15:15:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:54,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,738 WARN L205 SmtUtils]: Spent 18.80 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 15:16:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:19,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:22,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:22,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:22,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:22,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:23,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:23,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:23,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:23,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:29,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:41,790 WARN L205 SmtUtils]: Spent 8.27 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:16:56,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:56,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 15:16:56,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:16:56,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086701707] [2021-05-02 15:16:56,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:16:56,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758218237] [2021-05-02 15:16:56,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758218237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:16:56,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:16:56,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:16:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85922865] [2021-05-02 15:16:56,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:16:56,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:16:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:16:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=199, Unknown=6, NotChecked=0, Total=240 [2021-05-02 15:16:56,713 INFO L87 Difference]: Start difference. First operand 264 states and 308 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 15:17:02,568 WARN L205 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:17:10,364 WARN L205 SmtUtils]: Spent 7.58 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 15:17:26,682 WARN L205 SmtUtils]: Spent 16.19 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:17:33,080 WARN L205 SmtUtils]: Spent 6.27 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 15:17:45,396 WARN L205 SmtUtils]: Spent 12.00 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 15:18:01,933 WARN L205 SmtUtils]: Spent 8.67 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 15:18:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:03,834 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2021-05-02 15:18:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:18:03,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 110 [2021-05-02 15:18:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:03,836 INFO L225 Difference]: With dead ends: 346 [2021-05-02 15:18:03,836 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 15:18:03,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 118251.4ms TimeCoverageRelationStatistics Valid=91, Invalid=503, Unknown=6, NotChecked=0, Total=600 [2021-05-02 15:18:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 15:18:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2021-05-02 15:18:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 233 states have (on average 1.1201716738197425) internal successors, (261), 240 states have internal predecessors, (261), 75 states have call successors, (75), 34 states have call predecessors, (75), 33 states have return successors, (74), 67 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 15:18:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 410 transitions. [2021-05-02 15:18:03,917 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 410 transitions. Word has length 110 [2021-05-02 15:18:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:03,917 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 410 transitions. [2021-05-02 15:18:03,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 15:18:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 410 transitions. [2021-05-02 15:18:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 15:18:03,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:03,918 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 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 15:18:04,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:04,122 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1650436096, now seen corresponding path program 7 times [2021-05-02 15:18:04,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:04,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908840975] [2021-05-02 15:18:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:04,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:04,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955937821] [2021-05-02 15:18:04,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 15:18:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:18:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:04,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 47 proven. 51 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 15:18:04,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908840975] [2021-05-02 15:18:04,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955937821] [2021-05-02 15:18:04,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955937821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:04,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:04,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:18:04,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871717085] [2021-05-02 15:18:04,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:18:04,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:18:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:18:04,459 INFO L87 Difference]: Start difference. First operand 342 states and 410 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-05-02 15:18:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:04,693 INFO L93 Difference]: Finished difference Result 425 states and 521 transitions. [2021-05-02 15:18:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:18:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 117 [2021-05-02 15:18:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:04,695 INFO L225 Difference]: With dead ends: 425 [2021-05-02 15:18:04,695 INFO L226 Difference]: Without dead ends: 381 [2021-05-02 15:18:04,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:18:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-02 15:18:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 324. [2021-05-02 15:18:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 221 states have (on average 1.1040723981900453) internal successors, (244), 228 states have internal predecessors, (244), 69 states have call successors, (69), 34 states have call predecessors, (69), 33 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 15:18:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 381 transitions. [2021-05-02 15:18:04,724 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 381 transitions. Word has length 117 [2021-05-02 15:18:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:04,724 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 381 transitions. [2021-05-02 15:18:04,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 9 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-05-02 15:18:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 381 transitions. [2021-05-02 15:18:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 15:18:04,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:04,725 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 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 15:18:04,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:18:04,940 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash 502868352, now seen corresponding path program 8 times [2021-05-02 15:18:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885064014] [2021-05-02 15:18:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:04,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:04,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393827276] [2021-05-02 15:18:04,949 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:04,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:18:04,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:18:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:05,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-02 15:18:05,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885064014] [2021-05-02 15:18:05,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393827276] [2021-05-02 15:18:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393827276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:05,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:05,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:18:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573003079] [2021-05-02 15:18:05,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:18:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:18:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:18:05,215 INFO L87 Difference]: Start difference. First operand 324 states and 381 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:18:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:05,358 INFO L93 Difference]: Finished difference Result 391 states and 469 transitions. [2021-05-02 15:18:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:18:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 117 [2021-05-02 15:18:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:05,360 INFO L225 Difference]: With dead ends: 391 [2021-05-02 15:18:05,360 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 15:18:05,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:18:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 15:18:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 299. [2021-05-02 15:18:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 204 states have (on average 1.088235294117647) internal successors, (222), 210 states have internal predecessors, (222), 63 states have call successors, (63), 32 states have call predecessors, (63), 31 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-02 15:18:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 347 transitions. [2021-05-02 15:18:05,387 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 347 transitions. Word has length 117 [2021-05-02 15:18:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:05,388 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 347 transitions. [2021-05-02 15:18:05,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:18:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 347 transitions. [2021-05-02 15:18:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 15:18:05,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:05,389 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 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 15:18:05,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:18:05,603 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1454434284, now seen corresponding path program 9 times [2021-05-02 15:18:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:05,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120928742] [2021-05-02 15:18:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:05,608 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:05,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014392790] [2021-05-02 15:18:05,608 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:05,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:18:05,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:18:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,158 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~v~0 Int) (main_~r~0 Int)) (= (+ (* main_~v~0 main_~v~0) (* 4 c_main_~A~0) (* 4 main_~r~0) (* 2 c_main_~u~0)) (+ (* c_main_~u~0 c_main_~u~0) (* 2 main_~v~0)))) is different from true [2021-05-02 15:18:09,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,269 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~v~0 Int) (v_main_~r~0_65 Int) (v_main_~r~0_66 Int)) (= (+ (* main_~v~0 main_~v~0) (* 2 (* v_main_~r~0_65 c_main_~r~0)) (* 4 c_main_~A~0) (* 2 c_main_~r~0) (* 4 v_main_~r~0_66)) (+ (* 2 main_~v~0) (* c_main_~r~0 c_main_~r~0) (* v_main_~r~0_65 v_main_~r~0_65) (* 2 v_main_~r~0_65)))) is different from true [2021-05-02 15:18:11,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:11,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:13,326 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:18:13,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:13,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:15,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:15,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 252 trivial. 8 not checked. [2021-05-02 15:18:15,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120928742] [2021-05-02 15:18:15,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014392790] [2021-05-02 15:18:15,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014392790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:15,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:15,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:18:15,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843123161] [2021-05-02 15:18:15,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:18:15,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:15,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:18:15,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=42, Unknown=3, NotChecked=26, Total=90 [2021-05-02 15:18:15,390 INFO L87 Difference]: Start difference. First operand 299 states and 347 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-02 15:19:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:07,735 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2021-05-02 15:19:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:19:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-05-02 15:19:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:07,737 INFO L225 Difference]: With dead ends: 335 [2021-05-02 15:19:07,737 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 15:19:07,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 11527.8ms TimeCoverageRelationStatistics Valid=30, Invalid=65, Unknown=3, NotChecked=34, Total=132 [2021-05-02 15:19:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 15:19:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 300. [2021-05-02 15:19:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 206 states have (on average 1.0825242718446602) internal successors, (223), 212 states have internal predecessors, (223), 58 states have call successors, (58), 36 states have call predecessors, (58), 35 states have return successors, (57), 51 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 15:19:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 338 transitions. [2021-05-02 15:19:07,765 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 338 transitions. Word has length 117 [2021-05-02 15:19:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:07,765 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 338 transitions. [2021-05-02 15:19:07,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-02 15:19:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 338 transitions. [2021-05-02 15:19:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 15:19:07,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:07,767 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:07,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:19:07,967 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1721602856, now seen corresponding path program 10 times [2021-05-02 15:19:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:07,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194046355] [2021-05-02 15:19:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:07,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:07,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088188357] [2021-05-02 15:19:07,977 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:08,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:19:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:19:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:19:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:08,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:29,849 WARN L205 SmtUtils]: Spent 18.80 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 15:19:32,843 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 15:19:32,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194046355] [2021-05-02 15:19:32,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088188357] [2021-05-02 15:19:32,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-05-02 15:19:32,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:19:32,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:19:32,847 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:19:32,847 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:19:33,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:33,070 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:19:33,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:19:33 BoogieIcfgContainer [2021-05-02 15:19:33,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:19:33,070 INFO L168 Benchmark]: Toolchain (without parser) took 723377.21 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.5 MB in the beginning and 147.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 56.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:33,070 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory is still 179.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:19:33,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.11 ms. Allocated memory is still 198.2 MB. Free memory was 163.3 MB in the beginning and 153.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:33,070 INFO L168 Benchmark]: Boogie Preprocessor took 68.36 ms. Allocated memory is still 198.2 MB. Free memory was 152.9 MB in the beginning and 180.5 MB in the end (delta: -27.6 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:33,071 INFO L168 Benchmark]: RCFGBuilder took 300.70 ms. Allocated memory is still 198.2 MB. Free memory was 180.5 MB in the beginning and 164.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:33,071 INFO L168 Benchmark]: TraceAbstraction took 722852.35 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.7 MB in the beginning and 147.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 56.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:33,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory is still 179.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 151.11 ms. Allocated memory is still 198.2 MB. Free memory was 163.3 MB in the beginning and 153.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.36 ms. Allocated memory is still 198.2 MB. Free memory was 152.9 MB in the beginning and 180.5 MB in the end (delta: -27.6 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 300.70 ms. Allocated memory is still 198.2 MB. Free memory was 180.5 MB in the beginning and 164.3 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 722852.35 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.7 MB in the beginning and 147.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 56.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(A>=0 && A<=50) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=50) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=50) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=50) [L26] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L37] COND FALSE !(!(r != 0)) [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND TRUE !(r > 0) [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND FALSE !(!(r < 0)) [L52] r = r + u [L53] u = u + 2 [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND TRUE !(r < 0) [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L37] COND FALSE !(!(r != 0)) [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND TRUE !(r > 0) [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND FALSE !(!(r < 0)) [L52] r = r + u [L53] u = u + 2 [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND TRUE !(r < 0) [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L37] COND FALSE !(!(r != 0)) [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND FALSE !(!(r > 0)) [L44] r = r - v [L45] v = v + 2 [L40] COND TRUE 1 [L41] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L42] COND TRUE !(r > 0) [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L50] COND FALSE !(!(r < 0)) [L52] r = r + u [L53] u = u + 2 [L48] COND TRUE 1 [L49] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 722788.2ms, OverallIterations: 19, TraceHistogramMax: 15, EmptinessCheckTime: 25.6ms, AutomataDifference: 524194.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 822 SDtfs, 604 SDslu, 3955 SDs, 0 SdLazy, 3731 SolverSat, 409 SolverUnsat, 137 SolverUnknown, 0 SolverNotchecked, 353775.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1501 GetRequests, 1280 SyntacticMatches, 9 SemanticMatches, 212 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 331002.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=400occurred in iteration=10, InterpolantAutomatonStates: 184, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 551.7ms AutomataMinimizationTime, 18 MinimizatonAttempts, 264 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 126.6ms SsaConstructionTime, 854.3ms SatisfiabilityAnalysisTime, 167591.0ms InterpolantComputationTime, 1447 NumberOfCodeBlocks, 1275 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1429 ConstructedInterpolants, 96 QuantifiedInterpolants, 9372 SizeOfPredicates, 65 NumberOfNonLiveVariables, 3444 ConjunctsInSsa, 401 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 2878/3278 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...