/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/geo3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:00:03,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:00:03,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:00:03,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:00:03,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:00:03,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:00:03,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:00:03,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:00:03,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:00:03,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:00:03,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:00:03,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:00:03,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:00:03,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:00:03,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:00:03,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:00:03,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:00:03,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:00:03,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:00:03,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:00:03,641 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 [2021-05-06 03:00:03,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:00:03,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:00:03,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:00:03,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:00:03,681 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:00:03,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:00:03,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:00:03,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:00:03,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:00:03,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:00:03,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:00:03,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:00:03,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:00:03,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:00:03,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:00:03,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:00:03,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:00:03,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:00:03,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:00:03,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:00:03,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:00:03,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:00:03,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:00:03,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:00:03,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:00:04,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:00:04,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:00:04,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:00:04,022 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:00:04,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-06 03:00:04,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0da84c500/c6d80307827044b1942d89e3fb4b443c/FLAG3aba2868f [2021-05-06 03:00:04,611 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:00:04,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-06 03:00:04,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0da84c500/c6d80307827044b1942d89e3fb4b443c/FLAG3aba2868f [2021-05-06 03:00:04,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0da84c500/c6d80307827044b1942d89e3fb4b443c [2021-05-06 03:00:04,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:00:04,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:00:04,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:04,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:00:04,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:00:04,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de4f61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04, skipping insertion in model container [2021-05-06 03:00:04,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:00:04,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:00:05,060 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/geo3-ll_unwindbound50.c[525,538] [2021-05-06 03:00:05,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:05,080 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:00:05,090 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/geo3-ll_unwindbound50.c[525,538] [2021-05-06 03:00:05,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:05,107 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:00:05,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05 WrapperNode [2021-05-06 03:00:05,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:05,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:00:05,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:00:05,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:00:05,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (1/1) ... [2021-05-06 03:00:05,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:00:05,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:00:05,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:00:05,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:00:05,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (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 [2021-05-06 03:00:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:00:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:00:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:00:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:00:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:00:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:00:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:00:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:00:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:00:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:00:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:00:05,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:00:05,468 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 03:00:05,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:05 BoogieIcfgContainer [2021-05-06 03:00:05,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:00:05,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:00:05,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:00:05,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:00:05,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:00:04" (1/3) ... [2021-05-06 03:00:05,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4beec737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:05, skipping insertion in model container [2021-05-06 03:00:05,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:05" (2/3) ... [2021-05-06 03:00:05,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4beec737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:05, skipping insertion in model container [2021-05-06 03:00:05,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:05" (3/3) ... [2021-05-06 03:00:05,476 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound50.c [2021-05-06 03:00:05,480 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:00:05,484 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:00:05,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:00:05,516 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:00:05,516 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:00:05,517 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:00:05,517 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:00:05,517 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:00:05,517 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:00:05,517 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:00:05,517 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:00:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 03:00:05,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:05,537 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:05,537 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 03:00:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:05,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442510480] [2021-05-06 03:00:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:05,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:05,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432746051] [2021-05-06 03:00:05,632 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 [2021-05-06 03:00:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 03:00:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:05,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:05,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442510480] [2021-05-06 03:00:05,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:05,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432746051] [2021-05-06 03:00:05,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432746051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:05,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:05,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 03:00:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704374702] [2021-05-06 03:00:05,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 03:00:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:05,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 03:00:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 03:00:05,840 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:05,863 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 03:00:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 03:00:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 03:00:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:05,870 INFO L225 Difference]: With dead ends: 38 [2021-05-06 03:00:05,870 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 03:00:05,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 03:00:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 03:00:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 03:00:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 03:00:05,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 03:00:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:05,904 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 03:00:05,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 03:00:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:00:05,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:05,907 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:06,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 03:00:06,132 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 03:00:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669849199] [2021-05-06 03:00:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:06,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:06,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925183455] [2021-05-06 03:00:06,164 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 [2021-05-06 03:00:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:00:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669849199] [2021-05-06 03:00:06,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:06,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925183455] [2021-05-06 03:00:06,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925183455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:06,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:06,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:00:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431313027] [2021-05-06 03:00:06,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:00:06,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:00:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:00:06,473 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:06,506 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 03:00:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:00:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:00:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:06,511 INFO L225 Difference]: With dead ends: 26 [2021-05-06 03:00:06,511 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 03:00:06,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:00:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 03:00:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 03:00:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 03:00:06,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 03:00:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:06,522 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 03:00:06,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 03:00:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:00:06,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:06,528 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:06,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:06,749 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 03:00:06,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:06,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116339933] [2021-05-06 03:00:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:06,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:06,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034449960] [2021-05-06 03:00:06,774 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 [2021-05-06 03:00:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:00:06,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:06,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116339933] [2021-05-06 03:00:06,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034449960] [2021-05-06 03:00:06,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034449960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:06,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:06,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:00:06,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800231903] [2021-05-06 03:00:06,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:00:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:00:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:00:06,924 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:06,955 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 03:00:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:00:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:00:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:06,956 INFO L225 Difference]: With dead ends: 28 [2021-05-06 03:00:06,957 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 03:00:06,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 03:00:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 03:00:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 03:00:06,962 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 03:00:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:06,962 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 03:00:06,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 03:00:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:00:06,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:06,964 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:07,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,187 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 03:00:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:07,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269147644] [2021-05-06 03:00:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:07,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:07,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229559883] [2021-05-06 03:00:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:00:07,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:07,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:07,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:07,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269147644] [2021-05-06 03:00:07,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:07,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229559883] [2021-05-06 03:00:07,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229559883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:07,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:07,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:00:07,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981953262] [2021-05-06 03:00:07,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:00:07,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:00:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:00:07,475 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:07,502 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 03:00:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:00:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:00:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:07,503 INFO L225 Difference]: With dead ends: 34 [2021-05-06 03:00:07,503 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 03:00:07,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 03:00:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 03:00:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 03:00:07,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 03:00:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:07,508 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 03:00:07,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 03:00:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:00:07,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:07,509 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:07,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,731 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 03:00:07,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:07,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545604952] [2021-05-06 03:00:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:07,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:07,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341725928] [2021-05-06 03:00:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:00:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:07,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:07,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:07,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545604952] [2021-05-06 03:00:07,932 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:07,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341725928] [2021-05-06 03:00:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341725928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:07,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:00:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855648473] [2021-05-06 03:00:07,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:00:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:00:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:07,934 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:08,269 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 03:00:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:00:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:00:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:08,271 INFO L225 Difference]: With dead ends: 36 [2021-05-06 03:00:08,271 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:00:08,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:00:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:00:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:00:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 03:00:08,276 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 03:00:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:08,276 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 03:00:08,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 03:00:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:00:08,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:08,277 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:08,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:08,493 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 03:00:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036773942] [2021-05-06 03:00:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:08,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:08,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879356634] [2021-05-06 03:00:08,507 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 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 [2021-05-06 03:00:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:00:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:00:08,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:08,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:08,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036773942] [2021-05-06 03:00:08,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879356634] [2021-05-06 03:00:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879356634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:08,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:08,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:00:08,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826075758] [2021-05-06 03:00:08,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:00:08,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:00:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:08,699 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:08,739 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 03:00:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:00:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 03:00:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:08,741 INFO L225 Difference]: With dead ends: 42 [2021-05-06 03:00:08,741 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 03:00:08,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:00:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 03:00:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 03:00:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 03:00:08,746 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 03:00:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:08,746 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 03:00:08,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 03:00:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:00:08,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:08,747 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:08,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:08,961 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 03:00:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:08,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055386103] [2021-05-06 03:00:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:08,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:08,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350461420] [2021-05-06 03:00:08,977 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 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 [2021-05-06 03:00:09,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:00:09,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 03:00:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 03:00:09,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:09,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055386103] [2021-05-06 03:00:09,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:09,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350461420] [2021-05-06 03:00:09,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350461420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:09,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:09,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:00:09,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559857489] [2021-05-06 03:00:09,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:00:09,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:09,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:00:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:00:09,325 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:09,548 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 03:00:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:00:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 03:00:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:09,552 INFO L225 Difference]: With dead ends: 44 [2021-05-06 03:00:09,552 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:00:09,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:00:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:00:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 03:00:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 03:00:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 03:00:09,568 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 03:00:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:09,569 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 03:00:09,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 03:00:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:00:09,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:09,570 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:09,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:09,801 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 03:00:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:09,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419497388] [2021-05-06 03:00:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:09,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:09,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038508192] [2021-05-06 03:00:09,810 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 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 [2021-05-06 03:00:09,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 03:00:09,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:00:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:00:10,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419497388] [2021-05-06 03:00:10,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038508192] [2021-05-06 03:00:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038508192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:10,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:10,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:00:10,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245772220] [2021-05-06 03:00:10,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:00:10,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:10,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:00:10,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:00:10,126 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)