/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:14:11,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:14:11,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:14:11,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:14:11,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:14:11,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:14:11,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:14:11,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:14:11,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:14:11,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:14:11,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:14:11,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:14:11,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:14:11,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:14:11,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:14:11,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:14:11,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:14:11,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:14:11,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:14:11,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:14:11,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:14:11,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:14:11,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:14:11,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:14:11,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:14:11,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:14:11,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:14:11,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:14:11,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:14:11,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:14:11,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:14:11,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:14:11,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:14:11,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:14:11,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:14:11,905 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:14:11,906 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:14:11,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-02 15:14:11,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77a26378/b0233b7b163e4898a91f1bd474b5711c/FLAG226d3c3d9 [2021-05-02 15:14:12,280 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:14:12,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-02 15:14:12,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77a26378/b0233b7b163e4898a91f1bd474b5711c/FLAG226d3c3d9 [2021-05-02 15:14:12,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77a26378/b0233b7b163e4898a91f1bd474b5711c [2021-05-02 15:14:12,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:14:12,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:14:12,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:14:12,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:14:12,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:14:12,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@979bde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12, skipping insertion in model container [2021-05-02 15:14:12,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:14:12,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:14:12,835 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2021-05-02 15:14:12,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:14:12,851 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:14:12,859 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2021-05-02 15:14:12,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:14:12,871 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:14:12,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12 WrapperNode [2021-05-02 15:14:12,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:14:12,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:14:12,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:14:12,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:14:12,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... [2021-05-02 15:14:12,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:14:12,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:14:12,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:14:12,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:14:12,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:14:13,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:14:13,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:14:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:14:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:14:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:14:13,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:14:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:14:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:14:13,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:14:13,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:14:13,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:14:13,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:14:13,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:14:13,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:14:13,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:14:13,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:14:13,213 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:14:13,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:14:13 BoogieIcfgContainer [2021-05-02 15:14:13,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:14:13,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:14:13,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:14:13,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:14:13,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:14:12" (1/3) ... [2021-05-02 15:14:13,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d215d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:14:13, skipping insertion in model container [2021-05-02 15:14:13,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:14:12" (2/3) ... [2021-05-02 15:14:13,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d215d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:14:13, skipping insertion in model container [2021-05-02 15:14:13,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:14:13" (3/3) ... [2021-05-02 15:14:13,218 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.c [2021-05-02 15:14:13,221 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:14:13,223 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:14:13,247 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:14:13,260 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:14:13,260 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:14:13,260 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:14:13,260 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:14:13,260 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:14:13,260 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:14:13,260 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:14:13,261 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:14:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:14:13,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:14:13,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:13,273 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 15:14:13,274 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 15:14:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:13,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443662879] [2021-05-02 15:14:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:13,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:13,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868720457] [2021-05-02 15:14:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:14:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:13,521 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 15:14:13,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:13,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443662879] [2021-05-02 15:14:13,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:13,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868720457] [2021-05-02 15:14:13,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868720457] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:14:13,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:14:13,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:14:13,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804001553] [2021-05-02 15:14:13,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:14:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:14:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:14:13,539 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 15:14:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:13,555 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:14:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:14:13,556 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 15:14:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:13,561 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:14:13,561 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:14:13,564 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 15:14:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:14:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:14:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:14:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 15:14:13,591 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 15:14:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:13,591 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 15:14:13,592 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 15:14:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 15:14:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:14:13,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:13,593 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:14:13,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:14:13,813 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 15:14:13,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:13,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219315753] [2021-05-02 15:14:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:13,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:13,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33796131] [2021-05-02 15:14:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:14:13,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:13,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:13,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:13,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:13,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:14:13,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219315753] [2021-05-02 15:14:13,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33796131] [2021-05-02 15:14:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33796131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:14:13,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:14:13,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:14:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426241721] [2021-05-02 15:14:13,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:14:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:14:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:14:13,961 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:14:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:13,969 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 15:14:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:14:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:14:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:13,970 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:14:13,970 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:14:13,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:14:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:14:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:14:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:14:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:14:13,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 15:14:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:13,975 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:14:13,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:14:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:14:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:14:13,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:13,976 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:14:14,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:14,181 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 15:14:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:14,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767725503] [2021-05-02 15:14:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:14,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:14,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605985826] [2021-05-02 15:14:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:14:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:14,347 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 15:14:14,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767725503] [2021-05-02 15:14:14,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605985826] [2021-05-02 15:14:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605985826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:14,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:14,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:14:14,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078747356] [2021-05-02 15:14:14,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:14:14,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:14,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:14:14,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:14:14,349 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 15:14:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:21,968 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 15:14:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:14:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-02 15:14:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:21,970 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:14:21,970 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:14:21,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:14:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:14:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 15:14:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:14:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:14:21,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:14:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:21,975 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:14:21,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 15:14:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:14:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:14:21,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:21,976 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, 1] [2021-05-02 15:14:22,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:22,189 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 15:14:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:22,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112959615] [2021-05-02 15:14:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:22,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:22,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220086146] [2021-05-02 15:14:22,198 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 15:14:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:14:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:22,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:22,538 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 15:14:22,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112959615] [2021-05-02 15:14:22,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:22,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220086146] [2021-05-02 15:14:22,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220086146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:22,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:22,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:14:22,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351620199] [2021-05-02 15:14:22,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:14:22,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:22,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:14:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:14:22,544 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (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 15:14:32,201 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:14:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:38,294 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 15:14:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:14:38,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (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 29 [2021-05-02 15:14:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:38,296 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:14:38,296 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:14:38,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2173.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:14:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:14:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:14:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:14:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:14:38,303 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-05-02 15:14:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:38,303 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:14:38,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (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 15:14:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:14:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:14:38,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:38,304 INFO L523 BasicCegarLoop]: trace histogram [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 15:14:38,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:38,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 15:14:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:38,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491250125] [2021-05-02 15:14:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:38,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:38,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697805517] [2021-05-02 15:14:38,525 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 15:14:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:14:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:14:38,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491250125] [2021-05-02 15:14:38,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:38,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697805517] [2021-05-02 15:14:38,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697805517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:38,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:38,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:14:38,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072644840] [2021-05-02 15:14:38,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:14:38,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:38,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:14:38,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:14:38,647 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:14:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:38,678 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 15:14:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:14:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:14:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:38,682 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:14:38,682 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:14:38,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:14:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:14:38,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 15:14:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:14:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-02 15:14:38,697 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-05-02 15:14:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:38,698 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-02 15:14:38,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:14:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-02 15:14:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:14:38,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:38,700 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:14:38,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:38,905 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1082012512, now seen corresponding path program 1 times [2021-05-02 15:14:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:38,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464909498] [2021-05-02 15:14:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:38,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:38,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077258504] [2021-05-02 15:14:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:14:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:14:39,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464909498] [2021-05-02 15:14:39,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:39,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077258504] [2021-05-02 15:14:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077258504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:39,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:39,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:14:39,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312442601] [2021-05-02 15:14:39,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:14:39,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:39,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:14:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:14:39,198 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:15:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:30,897 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-05-02 15:15:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:15:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:15:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:30,898 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:15:30,898 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:15:30,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:15:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:15:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-05-02 15:15:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:15:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 15:15:30,905 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-02 15:15:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:30,906 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 15:15:30,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:15:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 15:15:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:15:30,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:30,906 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:15:31,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:31,107 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1437947422, now seen corresponding path program 1 times [2021-05-02 15:15:31,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:31,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444948768] [2021-05-02 15:15:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:31,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:31,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786645800] [2021-05-02 15:15:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:15:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:31,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:46,980 WARN L205 SmtUtils]: Spent 13.59 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:16:04,634 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 15:16:04,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:16:04,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:16:04,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444948768] [2021-05-02 15:16:04,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:16:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786645800] [2021-05-02 15:16:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786645800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:16:04,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:16:04,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:16:04,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061876034] [2021-05-02 15:16:04,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:16:04,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:16:04,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:16:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 15:16:04,716 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:16:39,425 WARN L205 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:17:06,553 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 15:18:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:23,858 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-02 15:18:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:18:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:18:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:23,859 INFO L225 Difference]: With dead ends: 51 [2021-05-02 15:18:23,859 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 15:18:23,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70676.3ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 15:18:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 15:18:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-05-02 15:18:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:18:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-02 15:18:23,863 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2021-05-02 15:18:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:23,863 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-02 15:18:23,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:18:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-02 15:18:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:18:23,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:23,864 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 15:18:24,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:24,065 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 15:18:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:24,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930440527] [2021-05-02 15:18:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:24,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041438914] [2021-05-02 15:18:24,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:24,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:18:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:18:24,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:18:24,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930440527] [2021-05-02 15:18:24,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041438914] [2021-05-02 15:18:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041438914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:24,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:24,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:18:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340836229] [2021-05-02 15:18:24,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:18:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:18:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:18:24,215 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:18:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:24,275 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-02 15:18:24,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:18:24,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:18:24,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:24,276 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:18:24,276 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:18:24,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:18:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:18:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 15:18:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:18:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-05-02 15:18:24,281 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2021-05-02 15:18:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:24,281 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-05-02 15:18:24,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:18:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-05-02 15:18:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:18:24,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:24,282 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:24,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:18:24,483 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:24,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1450530842, now seen corresponding path program 2 times [2021-05-02 15:18:24,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:24,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055390430] [2021-05-02 15:18:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:24,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:24,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354155494] [2021-05-02 15:18:24,492 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 15:18:24,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:18:24,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:18:24,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:24,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:18:34,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055390430] [2021-05-02 15:18:34,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354155494] [2021-05-02 15:18:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354155494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:34,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:34,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:18:34,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885264177] [2021-05-02 15:18:34,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:18:34,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:18:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2021-05-02 15:18:34,299 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:19:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:04,242 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-05-02 15:19:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:19:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:19:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:04,243 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:19:04,243 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 15:19:04,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 9594.5ms TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2021-05-02 15:19:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 15:19:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-05-02 15:19:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:19:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-05-02 15:19:04,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 41 [2021-05-02 15:19:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:04,257 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-05-02 15:19:04,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:19:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-05-02 15:19:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:19:04,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:04,258 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:04,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:04,467 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1069429092, now seen corresponding path program 1 times [2021-05-02 15:19:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:04,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025696533] [2021-05-02 15:19:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:04,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:04,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517219726] [2021-05-02 15:19:04,473 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 15:19:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:19:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:19:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 15:19:04,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:04,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025696533] [2021-05-02 15:19:04,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:04,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517219726] [2021-05-02 15:19:04,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517219726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:19:04,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:19:04,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:19:04,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482149640] [2021-05-02 15:19:04,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:19:04,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:19:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:19:04,601 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:19:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:04,625 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-05-02 15:19:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:19:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 15:19:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:04,628 INFO L225 Difference]: With dead ends: 89 [2021-05-02 15:19:04,628 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 15:19:04,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:19:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 15:19:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 15:19:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.150943396226415) internal successors, (61), 55 states have internal predecessors, (61), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:19:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-02 15:19:04,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 41 [2021-05-02 15:19:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:04,649 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-02 15:19:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:19:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-02 15:19:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:19:04,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:04,653 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:04,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:04,869 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:04,869 INFO L82 PathProgramCache]: Analyzing trace with hash 429462488, now seen corresponding path program 2 times [2021-05-02 15:19:04,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:04,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063636591] [2021-05-02 15:19:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:04,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:04,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508102219] [2021-05-02 15:19:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:04,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:19:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:19:04,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:19:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:04,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 14 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:19:07,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063636591] [2021-05-02 15:19:07,383 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:07,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508102219] [2021-05-02 15:19:07,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508102219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:19:07,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:19:07,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:19:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110202277] [2021-05-02 15:19:07,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:19:07,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:19:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=153, Unknown=1, NotChecked=0, Total=182 [2021-05-02 15:19:07,384 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:19:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:32,808 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-05-02 15:19:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:19:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:19:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:32,810 INFO L225 Difference]: With dead ends: 82 [2021-05-02 15:19:32,810 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 15:19:32,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 6432.9ms TimeCoverageRelationStatistics Valid=67, Invalid=392, Unknown=3, NotChecked=0, Total=462 [2021-05-02 15:19:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 15:19:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-05-02 15:19:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:19:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-05-02 15:19:32,816 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 41 [2021-05-02 15:19:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:32,816 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-05-02 15:19:32,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:19:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-05-02 15:19:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:19:32,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:32,817 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:33,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:19:33,025 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2090497446, now seen corresponding path program 2 times [2021-05-02 15:19:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:33,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700146141] [2021-05-02 15:19:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:33,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:33,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655543979] [2021-05-02 15:19:33,031 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:33,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:19:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:19:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:19:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:33,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:33,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:33,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:33,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:33,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,494 WARN L205 SmtUtils]: Spent 9.23 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:19:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:44,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,713 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 15:20:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 13 refuted. 3 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 15:20:01,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700146141] [2021-05-02 15:20:01,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655543979] [2021-05-02 15:20:01,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655543979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:01,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:01,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:20:01,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161684957] [2021-05-02 15:20:01,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:20:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:20:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=147, Unknown=7, NotChecked=0, Total=182 [2021-05-02 15:20:01,892 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:20:54,489 WARN L205 SmtUtils]: Spent 13.52 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:22:23,181 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 88 [2021-05-02 15:22:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:33,570 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-05-02 15:22:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:22:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:22:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:33,572 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:22:33,572 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 15:22:33,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83202.2ms TimeCoverageRelationStatistics Valid=67, Invalid=370, Unknown=25, NotChecked=0, Total=462 [2021-05-02 15:22:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 15:22:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 15:22:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:22:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 15:22:33,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 41 [2021-05-02 15:22:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:33,578 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 15:22:33,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:22:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 15:22:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 15:22:33,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:33,579 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:33,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:33,793 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-02 15:22:33,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:33,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367580692] [2021-05-02 15:22:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:33,798 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:33,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627261950] [2021-05-02 15:22:33,798 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