/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/fermat1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:42:28,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:42:28,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:42:28,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:42:28,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:42:28,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:42:28,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:42:28,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:42:28,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:42:28,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:42:28,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:42:28,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:42:28,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:42:28,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:42:28,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:42:28,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:42:28,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:42:28,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:42:28,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:42:28,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:42:28,107 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 13:42:28,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:42:28,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:42:28,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:42:28,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:42:28,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:42:28,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:42:28,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:42:28,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:42:28,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:42:28,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:42:28,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:42:28,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:42:28,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:42:28,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:42:28,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:42:28,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:42:28,414 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:42:28,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat1-ll.c [2021-05-02 13:42:28,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1beaac0/58a6199e4c4d459ba28e5a6761076217/FLAG8c443c3aa [2021-05-02 13:42:28,836 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:42:28,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat1-ll.c [2021-05-02 13:42:28,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1beaac0/58a6199e4c4d459ba28e5a6761076217/FLAG8c443c3aa [2021-05-02 13:42:28,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1beaac0/58a6199e4c4d459ba28e5a6761076217 [2021-05-02 13:42:28,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:42:28,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:42:28,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:42:28,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:42:28,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:42:28,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:42:28" (1/1) ... [2021-05-02 13:42:28,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b9ee6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:28, skipping insertion in model container [2021-05-02 13:42:28,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:42:28" (1/1) ... [2021-05-02 13:42:28,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:42:28,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:42:28,999 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/fermat1-ll.c[535,548] [2021-05-02 13:42:29,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:42:29,037 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:42:29,079 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/fermat1-ll.c[535,548] [2021-05-02 13:42:29,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:42:29,103 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:42:29,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29 WrapperNode [2021-05-02 13:42:29,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:42:29,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:42:29,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:42:29,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:42:29,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (1/1) ... [2021-05-02 13:42:29,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:42:29,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:42:29,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:42:29,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:42:29,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (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 13:42:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:42:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:42:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:42:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:42:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:42:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:42:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:42:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:42:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:42:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:42:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:42:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:42:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:42:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:42:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:42:29,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:42:29,455 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 13:42:29,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:42:29 BoogieIcfgContainer [2021-05-02 13:42:29,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:42:29,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:42:29,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:42:29,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:42:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:42:28" (1/3) ... [2021-05-02 13:42:29,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d23d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:42:29, skipping insertion in model container [2021-05-02 13:42:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:42:29" (2/3) ... [2021-05-02 13:42:29,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d23d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:42:29, skipping insertion in model container [2021-05-02 13:42:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:42:29" (3/3) ... [2021-05-02 13:42:29,460 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll.c [2021-05-02 13:42:29,464 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:42:29,466 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:42:29,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:42:29,492 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:42:29,492 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:42:29,492 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:42:29,492 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:42:29,492 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:42:29,492 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:42:29,493 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:42:29,493 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:42:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:42:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:42:29,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:42:29,510 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:42:29,510 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:42:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:42:29,516 INFO L82 PathProgramCache]: Analyzing trace with hash -150104916, now seen corresponding path program 1 times [2021-05-02 13:42:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:42:29,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232546994] [2021-05-02 13:42:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:42:29,608 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:42:29,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673098296] [2021-05-02 13:42:29,609 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 13:42:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:42:29,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 13:42:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:42:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:42:29,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:42:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232546994] [2021-05-02 13:42:29,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:42:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673098296] [2021-05-02 13:42:29,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673098296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:42:29,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:42:29,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 13:42:29,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608624308] [2021-05-02 13:42:29,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 13:42:29,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:42:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 13:42:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 13:42:29,816 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:42:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:42:29,829 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2021-05-02 13:42:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 13:42:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:42:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:42:29,834 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:42:29,834 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:42:29,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 13:42:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:42:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 13:42:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:42:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 13:42:29,857 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2021-05-02 13:42:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:42:29,858 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 13:42:29,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:42:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 13:42:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:42:29,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:42:29,859 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:42:30,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 13:42:30,073 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:42:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:42:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash -521053945, now seen corresponding path program 1 times [2021-05-02 13:42:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:42:30,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119314814] [2021-05-02 13:42:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:42:30,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:42:30,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321386132] [2021-05-02 13:42:30,097 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 13:42:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:42:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:42:30,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:42:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:30,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:42:30,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:42:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119314814] [2021-05-02 13:42:30,384 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:42:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321386132] [2021-05-02 13:42:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321386132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:42:30,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:42:30,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:42:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327694534] [2021-05-02 13:42:30,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:42:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:42:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:42:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:42:30,390 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:42:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:42:36,681 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 13:42:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:42:36,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:42:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:42:36,683 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:42:36,683 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:42:36,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:42:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:42:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 13:42:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:42:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-05-02 13:42:36,693 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2021-05-02 13:42:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:42:36,693 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-05-02 13:42:36,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:42:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-05-02 13:42:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:42:36,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:42:36,694 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:42:36,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:42:36,901 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:42:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:42:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash -773887245, now seen corresponding path program 1 times [2021-05-02 13:42:36,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:42:36,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511525844] [2021-05-02 13:42:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:42:36,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:42:36,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358665512] [2021-05-02 13:42:36,916 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 13:42:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:42:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:42:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:42:37,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:42:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:42:37,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:42:37,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511525844] [2021-05-02 13:42:37,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:42:37,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358665512] [2021-05-02 13:42:37,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358665512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:42:37,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:42:37,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:42:37,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925989391] [2021-05-02 13:42:37,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:42:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:42:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:42:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:42:37,408 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:08,606 WARN L205 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 13:43:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:11,645 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-05-02 13:43:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:43:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 13:43:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:11,648 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:43:11,648 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:43:11,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8316.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:43:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:43:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 13:43:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:43:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-05-02 13:43:11,657 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2021-05-02 13:43:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:11,657 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-05-02 13:43:11,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-05-02 13:43:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:43:11,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:11,665 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-02 13:43:11,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:11,873 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:11,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1854112267, now seen corresponding path program 1 times [2021-05-02 13:43:11,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:11,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212096551] [2021-05-02 13:43:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:11,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194170469] [2021-05-02 13:43:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:43:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:43:12,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:12,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212096551] [2021-05-02 13:43:12,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:12,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194170469] [2021-05-02 13:43:12,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194170469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:12,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:12,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:43:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653761454] [2021-05-02 13:43:12,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:43:12,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:43:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:43:12,022 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:43:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:18,594 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-05-02 13:43:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:43:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2021-05-02 13:43:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:18,595 INFO L225 Difference]: With dead ends: 65 [2021-05-02 13:43:18,596 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 13:43:18,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:43:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 13:43:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 13:43:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:43:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-05-02 13:43:18,608 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 36 [2021-05-02 13:43:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:18,608 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-05-02 13:43:18,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:43:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-05-02 13:43:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:43:18,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:18,609 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 13:43:18,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:18,810 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1895611130, now seen corresponding path program 1 times [2021-05-02 13:43:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:18,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089921462] [2021-05-02 13:43:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:18,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:18,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976061167] [2021-05-02 13:43:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:43:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:18,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:43:19,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:19,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089921462] [2021-05-02 13:43:19,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976061167] [2021-05-02 13:43:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976061167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:19,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:19,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:43:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399494951] [2021-05-02 13:43:19,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:43:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:43:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:43:19,104 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:43:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:45,375 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-05-02 13:43:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:43:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 13:43:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:45,377 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:43:45,377 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 13:43:45,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:43:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 13:43:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 13:43:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:43:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-05-02 13:43:45,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 36 [2021-05-02 13:43:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:45,387 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-05-02 13:43:45,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:43:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-05-02 13:43:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:43:45,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:45,388 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-02 13:43:45,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:45,597 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:45,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1891185475, now seen corresponding path program 1 times [2021-05-02 13:43:45,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:45,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045145636] [2021-05-02 13:43:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:45,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:45,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581642691] [2021-05-02 13:43:45,605 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 13:43:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:43:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:45,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:45,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:25,544 WARN L205 SmtUtils]: Spent 37.75 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:44:25,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:25,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,954 WARN L205 SmtUtils]: Spent 13.29 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 13:44:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 7 refuted. 2 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:44:47,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:47,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045145636] [2021-05-02 13:44:47,021 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:47,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581642691] [2021-05-02 13:44:47,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581642691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:47,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:47,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:44:47,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760569393] [2021-05-02 13:44:47,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:44:47,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:47,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:44:47,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 13:44:47,023 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:45:16,411 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:45:53,666 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:46:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:46:31,716 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-05-02 13:46:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:46:31,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 13:46:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:46:31,717 INFO L225 Difference]: With dead ends: 96 [2021-05-02 13:46:31,717 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 13:46:31,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 100746.9ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 13:46:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 13:46:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-05-02 13:46:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 57 states have internal predecessors, (58), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:46:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-05-02 13:46:31,727 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 43 [2021-05-02 13:46:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:46:31,727 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-05-02 13:46:31,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:46:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-05-02 13:46:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:46:31,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:46:31,728 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:46:31,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:46:31,929 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:46:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:46:31,930 INFO L82 PathProgramCache]: Analyzing trace with hash 939009934, now seen corresponding path program 2 times [2021-05-02 13:46:31,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:46:31,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728694273] [2021-05-02 13:46:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:46:31,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:46:31,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819667566] [2021-05-02 13:46:31,936 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 [2021-05-02 13:46:31,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:46:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:46:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:46:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:46:32,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:32,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:46:35,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:46:35,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728694273] [2021-05-02 13:46:35,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:46:35,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819667566] [2021-05-02 13:46:35,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819667566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:46:35,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:46:35,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:46:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191862736] [2021-05-02 13:46:35,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:46:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:46:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:46:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2021-05-02 13:46:35,369 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:46:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:46:46,812 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2021-05-02 13:46:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:46:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-05-02 13:46:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:46:46,815 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:46:46,815 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 13:46:46,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3211.9ms TimeCoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2021-05-02 13:46:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 13:46:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2021-05-02 13:46:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 77 states have internal predecessors, (83), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (22), 16 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:46:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2021-05-02 13:46:46,828 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 43 [2021-05-02 13:46:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:46:46,828 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2021-05-02 13:46:46,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:46:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2021-05-02 13:46:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:46:46,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:46:46,829 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2021-05-02 13:46:47,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:46:47,030 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:46:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:46:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 933320399, now seen corresponding path program 1 times [2021-05-02 13:46:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:46:47,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735674543] [2021-05-02 13:46:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:46:47,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:46:47,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322231319] [2021-05-02 13:46:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:46:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:46:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:46:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:46:47,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 13:46:47,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:46:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735674543] [2021-05-02 13:46:47,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:46:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322231319] [2021-05-02 13:46:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322231319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:46:47,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:46:47,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:46:47,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622079632] [2021-05-02 13:46:47,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:46:47,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:46:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:46:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:46:47,180 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 13:46:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:46:47,208 INFO L93 Difference]: Finished difference Result 191 states and 241 transitions. [2021-05-02 13:46:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:46:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 13:46:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:46:47,211 INFO L225 Difference]: With dead ends: 191 [2021-05-02 13:46:47,211 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:46:47,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:46:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:46:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-05-02 13:46:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.2) internal successors, (84), 74 states have internal predecessors, (84), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:46:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2021-05-02 13:46:47,236 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 49 [2021-05-02 13:46:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:46:47,236 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2021-05-02 13:46:47,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 13:46:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2021-05-02 13:46:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 13:46:47,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:46:47,241 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2021-05-02 13:46:47,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 13:46:47,458 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:46:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:46:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash -290622005, now seen corresponding path program 2 times [2021-05-02 13:46:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:46:47,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025816487] [2021-05-02 13:46:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:46:47,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:46:47,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955181693] [2021-05-02 13:46:47,464 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 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 13:46:47,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:46:47,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:46:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:46:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:46:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:57,986 WARN L205 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 13:46:58,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:58,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:58,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:58,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:15,110 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 13:47:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:15,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:15,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:41,537 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 13:47:41,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:47:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 7 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:47:41,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:47:41,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025816487] [2021-05-02 13:47:41,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:47:41,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955181693] [2021-05-02 13:47:41,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955181693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:47:41,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:47:41,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:47:41,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579567868] [2021-05-02 13:47:41,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:47:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:47:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:47:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=121, Unknown=10, NotChecked=0, Total=156 [2021-05-02 13:47:41,604 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 13:48:32,041 WARN L205 SmtUtils]: Spent 16.52 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:49:39,558 WARN L205 SmtUtils]: Spent 11.11 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:50:19,966 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:52:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:14,239 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2021-05-02 13:52:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:52:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 50 [2021-05-02 13:52:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:14,241 INFO L225 Difference]: With dead ends: 140 [2021-05-02 13:52:14,241 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 13:52:14,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121946.6ms TimeCoverageRelationStatistics Valid=58, Invalid=297, Unknown=25, NotChecked=0, Total=380 [2021-05-02 13:52:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 13:52:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2021-05-02 13:52:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 90 states have (on average 1.2222222222222223) internal successors, (110), 94 states have internal predecessors, (110), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:52:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 170 transitions. [2021-05-02 13:52:14,254 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 170 transitions. Word has length 50 [2021-05-02 13:52:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:14,254 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 170 transitions. [2021-05-02 13:52:14,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 13:52:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 170 transitions. [2021-05-02 13:52:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 13:52:14,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:14,255 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 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 13:52:14,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:14,464 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash 352833961, now seen corresponding path program 1 times [2021-05-02 13:52:14,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:14,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104358383] [2021-05-02 13:52:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:14,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:14,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350072971] [2021-05-02 13:52:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:52:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:14,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:52:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:52:14,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104358383] [2021-05-02 13:52:14,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350072971] [2021-05-02 13:52:14,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350072971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:14,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:14,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 13:52:14,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798098710] [2021-05-02 13:52:14,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:52:14,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:14,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:52:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:52:14,646 INFO L87 Difference]: Start difference. First operand 135 states and 170 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:52:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:14,726 INFO L93 Difference]: Finished difference Result 201 states and 260 transitions. [2021-05-02 13:52:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:52:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2021-05-02 13:52:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:14,728 INFO L225 Difference]: With dead ends: 201 [2021-05-02 13:52:14,728 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 13:52:14,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:52:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 13:52:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2021-05-02 13:52:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 92 states have internal predecessors, (104), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 13:52:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2021-05-02 13:52:14,740 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 50 [2021-05-02 13:52:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:14,741 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2021-05-02 13:52:14,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:52:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2021-05-02 13:52:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 13:52:14,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:14,742 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:14,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:14,953 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1111937926, now seen corresponding path program 3 times [2021-05-02 13:52:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:14,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684334296] [2021-05-02 13:52:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:14,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:14,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331514487] [2021-05-02 13:52:14,960 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 13:52:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:52:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:52:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:15,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 13:52:15,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684334296] [2021-05-02 13:52:15,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:15,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331514487] [2021-05-02 13:52:15,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331514487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:15,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:15,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:52:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093109312] [2021-05-02 13:52:15,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:52:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:52:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:15,331 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:52:21,483 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-02 13:52:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:27,819 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2021-05-02 13:52:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:52:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-05-02 13:52:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:27,820 INFO L225 Difference]: With dead ends: 155 [2021-05-02 13:52:27,821 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 13:52:27,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4248.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:52:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 13:52:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-05-02 13:52:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 106 states have internal predecessors, (121), 34 states have call successors, (34), 16 states have call predecessors, (34), 15 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 13:52:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2021-05-02 13:52:27,833 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 50 [2021-05-02 13:52:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:27,833 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2021-05-02 13:52:27,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:52:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2021-05-02 13:52:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 13:52:27,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:27,834 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 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, 1] [2021-05-02 13:52:28,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:52:28,049 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -734233251, now seen corresponding path program 1 times [2021-05-02 13:52:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:28,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063631468] [2021-05-02 13:52:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:28,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:28,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784955081] [2021-05-02 13:52:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:52:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:52:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:28,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 13:52:28,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:28,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063631468] [2021-05-02 13:52:28,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784955081] [2021-05-02 13:52:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784955081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:28,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:28,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:52:28,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025762658] [2021-05-02 13:52:28,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:52:28,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:52:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:52:28,672 INFO L87 Difference]: Start difference. First operand 152 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:52:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:55,540 INFO L93 Difference]: Finished difference Result 174 states and 204 transitions. [2021-05-02 13:52:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:52:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2021-05-02 13:52:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:55,541 INFO L225 Difference]: With dead ends: 174 [2021-05-02 13:52:55,541 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 13:52:55,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:52:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 13:52:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 13:52:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 117 states have internal predecessors, (127), 33 states have call successors, (33), 20 states have call predecessors, (33), 19 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 13:52:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2021-05-02 13:52:55,554 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 56 [2021-05-02 13:52:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:55,554 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2021-05-02 13:52:55,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:52:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2021-05-02 13:52:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 13:52:55,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:55,555 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 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 13:52:55,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:55,769 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -445177603, now seen corresponding path program 3 times [2021-05-02 13:52:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790474223] [2021-05-02 13:52:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:55,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:55,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686784824] [2021-05-02 13:52:55,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:55,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:52:55,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:52:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:55,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:55,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:57,924 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~u~0 Int) (main_~R~0 Int)) (= (+ (* main_~u~0 main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 (* main_~R~0 main_~R~0)) (* 2 main_~u~0)))) is different from true [2021-05-02 13:52:57,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:57,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:57,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,956 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~R~0 Int) (main_~u~0 Int)) (= (+ (* main_~u~0 main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 (* main_~R~0 main_~R~0)) (* 2 main_~u~0)))) is different from true [2021-05-02 13:52:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:59,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,316 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 13:53:04,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 8 not checked. [2021-05-02 13:53:04,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:04,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790474223] [2021-05-02 13:53:04,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686784824] [2021-05-02 13:53:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686784824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:04,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:04,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:53:04,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724044748] [2021-05-02 13:53:04,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:53:04,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:04,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:53:04,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2021-05-02 13:53:04,376 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:53:09,225 WARN L205 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-05-02 13:53:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:27,115 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2021-05-02 13:53:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:53:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2021-05-02 13:53:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:27,117 INFO L225 Difference]: With dead ends: 185 [2021-05-02 13:53:27,117 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 13:53:27,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 11217.7ms TimeCoverageRelationStatistics Valid=33, Invalid=83, Unknown=2, NotChecked=38, Total=156 [2021-05-02 13:53:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 13:53:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 13:53:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 129 states have internal predecessors, (139), 33 states have call successors, (33), 24 states have call predecessors, (33), 23 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 13:53:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2021-05-02 13:53:27,131 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 57 [2021-05-02 13:53:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:27,131 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2021-05-02 13:53:27,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:53:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2021-05-02 13:53:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:53:27,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:27,131 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:27,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:53:27,333 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -92421276, now seen corresponding path program 1 times [2021-05-02 13:53:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200876283] [2021-05-02 13:53:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:27,338 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:27,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436010499] [2021-05-02 13:53:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:53:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:53:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:27,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:27,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 23 proven. 16 refuted. 4 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:53:31,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:31,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200876283] [2021-05-02 13:53:31,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:31,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436010499] [2021-05-02 13:53:31,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436010499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:31,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:31,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:53:31,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291371687] [2021-05-02 13:53:31,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:53:31,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:31,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:53:31,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=129, Unknown=2, NotChecked=0, Total=156 [2021-05-02 13:53:31,981 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 13:54:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:27,990 INFO L93 Difference]: Finished difference Result 227 states and 249 transitions. [2021-05-02 13:54:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:54:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2021-05-02 13:54:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:27,992 INFO L225 Difference]: With dead ends: 227 [2021-05-02 13:54:27,992 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 13:54:27,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8558.8ms TimeCoverageRelationStatistics Valid=58, Invalid=318, Unknown=4, NotChecked=0, Total=380 [2021-05-02 13:54:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 13:54:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2021-05-02 13:54:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 155 states have (on average 1.0903225806451613) internal successors, (169), 159 states have internal predecessors, (169), 39 states have call successors, (39), 30 states have call predecessors, (39), 29 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 13:54:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2021-05-02 13:54:28,013 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 64 [2021-05-02 13:54:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:28,014 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2021-05-02 13:54:28,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 13:54:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2021-05-02 13:54:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 13:54:28,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:28,016 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:28,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:28,231 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash 939176932, now seen corresponding path program 2 times [2021-05-02 13:54:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:28,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36759665] [2021-05-02 13:54:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:28,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:54:28,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667006984] [2021-05-02 13:54:28,236 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 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 13:54:28,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:54:28,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:54:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:54:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:54:28,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:28,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:54:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 28 proven. 27 refuted. 1 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 13:54:30,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36759665] [2021-05-02 13:54:30,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:54:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667006984] [2021-05-02 13:54:30,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667006984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:54:30,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:54:30,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:54:30,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362970191] [2021-05-02 13:54:30,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:54:30,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:54:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=154, Unknown=1, NotChecked=0, Total=182 [2021-05-02 13:54:30,984 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:55:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:55:08,810 INFO L93 Difference]: Finished difference Result 255 states and 279 transitions. [2021-05-02 13:55:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:55:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 71 [2021-05-02 13:55:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:55:08,812 INFO L225 Difference]: With dead ends: 255 [2021-05-02 13:55:08,812 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 13:55:08,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 10946.1ms TimeCoverageRelationStatistics Valid=64, Invalid=395, Unknown=3, NotChecked=0, Total=462 [2021-05-02 13:55:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 13:55:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-05-02 13:55:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 175 states have (on average 1.0914285714285714) internal successors, (191), 179 states have internal predecessors, (191), 43 states have call successors, (43), 34 states have call predecessors, (43), 33 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 13:55:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 276 transitions. [2021-05-02 13:55:08,830 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 276 transitions. Word has length 71 [2021-05-02 13:55:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:55:08,830 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 276 transitions. [2021-05-02 13:55:08,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:55:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 276 transitions. [2021-05-02 13:55:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 13:55:08,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:55:08,831 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:55:09,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:55:09,041 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:55:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:55:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -94703850, now seen corresponding path program 3 times [2021-05-02 13:55:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:55:09,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990529273] [2021-05-02 13:55:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:55:09,046 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:55:09,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757021024] [2021-05-02 13:55:09,046 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 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 13:55:09,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:55:09,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:55:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:55:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:55:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:09,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:09,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:55:09,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:55:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990529273] [2021-05-02 13:55:09,345 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:55:09,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757021024] [2021-05-02 13:55:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757021024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:55:09,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:55:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:55:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134951077] [2021-05-02 13:55:09,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:55:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:55:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:55:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:55:09,346 INFO L87 Difference]: Start difference. First operand 252 states and 276 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:55:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:55:15,677 INFO L93 Difference]: Finished difference Result 288 states and 307 transitions. [2021-05-02 13:55:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:55:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-05-02 13:55:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:55:15,680 INFO L225 Difference]: With dead ends: 288 [2021-05-02 13:55:15,680 INFO L226 Difference]: Without dead ends: 286 [2021-05-02 13:55:15,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:55:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-02 13:55:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 223. [2021-05-02 13:55:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.0774193548387097) internal successors, (167), 159 states have internal predecessors, (167), 36 states have call successors, (36), 32 states have call predecessors, (36), 31 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 13:55:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2021-05-02 13:55:15,699 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 71 [2021-05-02 13:55:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:55:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2021-05-02 13:55:15,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:55:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2021-05-02 13:55:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:55:15,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:55:15,701 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:55:15,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:55:15,905 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:55:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:55:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 564540260, now seen corresponding path program 4 times [2021-05-02 13:55:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:55:15,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925949681] [2021-05-02 13:55:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:55:15,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:55:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603798970] [2021-05-02 13:55:15,921 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 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 13:55:15,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:55:15,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:55:15,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:55:15,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:55:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:16,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 24 proven. 41 refuted. 7 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 13:55:18,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:55:18,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925949681] [2021-05-02 13:55:18,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:55:18,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603798970] [2021-05-02 13:55:18,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603798970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:55:18,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:55:18,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:55:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302429293] [2021-05-02 13:55:18,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:55:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:55:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:55:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 13:55:18,847 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-05-02 13:57:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:57:10,977 INFO L93 Difference]: Finished difference Result 270 states and 296 transitions. [2021-05-02 13:57:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:57:10,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 78 [2021-05-02 13:57:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:57:10,980 INFO L225 Difference]: With dead ends: 270 [2021-05-02 13:57:10,980 INFO L226 Difference]: Without dead ends: 268 [2021-05-02 13:57:10,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 6840.4ms TimeCoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-05-02 13:57:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-02 13:57:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 254. [2021-05-02 13:57:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 177 states have (on average 1.0847457627118644) internal successors, (192), 181 states have internal predecessors, (192), 41 states have call successors, (41), 36 states have call predecessors, (41), 35 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 13:57:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 273 transitions. [2021-05-02 13:57:11,003 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 273 transitions. Word has length 78 [2021-05-02 13:57:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:57:11,003 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 273 transitions. [2021-05-02 13:57:11,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-05-02 13:57:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 273 transitions. [2021-05-02 13:57:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:57:11,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:57:11,004 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:57:11,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:57:11,217 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:57:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:57:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 580410354, now seen corresponding path program 5 times [2021-05-02 13:57:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:57:11,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739240306] [2021-05-02 13:57:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:57:11,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:57:11,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59259117] [2021-05-02 13:57:11,221 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 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 13:57:11,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 13:57:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:57:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:57:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:57:11,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:11,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:11,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:11,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:57:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:57:11,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:57:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739240306] [2021-05-02 13:57:11,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:57:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59259117] [2021-05-02 13:57:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59259117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:57:11,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:57:11,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:57:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558886996] [2021-05-02 13:57:11,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:57:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:57:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:57:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:57:11,553 INFO L87 Difference]: Start difference. First operand 254 states and 273 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8)