/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:05:28,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:05:28,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:05:28,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:05:28,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:05:28,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:05:28,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:05:28,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:05:28,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:05:28,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:05:28,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:05:28,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:05:28,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:05:28,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:05:28,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:05:28,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:05:28,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:05:28,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:05:28,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:05:28,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:05:28,165 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 15:05:28,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:05:28,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:05:28,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:05:28,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:05:28,206 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:05:28,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:05:28,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:05:28,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:05:28,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:05:28,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:05:28,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:05:28,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:05:28,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:05:28,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:05:28,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:05:28,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:05:28,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:05:28,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:05:28,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:05:28,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:05:28,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:05:28,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:05:28,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:05:28,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:05:28,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:05:28,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:05:28,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:05:28,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:05:28,523 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:05:28,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c [2021-05-02 15:05:28,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2800598/99f08e6d67d84be18afbbb494aed9d63/FLAG301deb310 [2021-05-02 15:05:29,298 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:05:29,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c [2021-05-02 15:05:29,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2800598/99f08e6d67d84be18afbbb494aed9d63/FLAG301deb310 [2021-05-02 15:05:29,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2800598/99f08e6d67d84be18afbbb494aed9d63 [2021-05-02 15:05:29,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:05:29,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:05:29,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:05:29,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:05:29,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:05:29,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29, skipping insertion in model container [2021-05-02 15:05:29,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:05:29,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:05:29,724 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c[535,548] [2021-05-02 15:05:29,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:05:29,746 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:05:29,757 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound100.c[535,548] [2021-05-02 15:05:29,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:05:29,775 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:05:29,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29 WrapperNode [2021-05-02 15:05:29,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:05:29,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:05:29,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:05:29,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:05:29,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... [2021-05-02 15:05:29,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:05:29,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:05:29,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:05:29,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:05:29,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:05:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:05:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:05:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:05:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:05:29,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:05:29,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:05:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:05:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:05:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:05:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:05:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:05:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:05:29,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:05:29,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:05:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:05:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:05:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:05:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:05:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:05:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:05:30,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:05:30,234 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:05:30,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:05:30 BoogieIcfgContainer [2021-05-02 15:05:30,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:05:30,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:05:30,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:05:30,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:05:30,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:05:29" (1/3) ... [2021-05-02 15:05:30,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616f2939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:05:30, skipping insertion in model container [2021-05-02 15:05:30,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:05:29" (2/3) ... [2021-05-02 15:05:30,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616f2939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:05:30, skipping insertion in model container [2021-05-02 15:05:30,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:05:30" (3/3) ... [2021-05-02 15:05:30,241 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound100.c [2021-05-02 15:05:30,245 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:05:30,248 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:05:30,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:05:30,278 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:05:30,279 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:05:30,279 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:05:30,279 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:05:30,279 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:05:30,279 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:05:30,279 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:05:30,279 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:05:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:05:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:05:30,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:30,297 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:30,297 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:30,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times [2021-05-02 15:05:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:30,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087732677] [2021-05-02 15:05:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:05:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:05:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:05:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:05:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:05:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:05:30,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:30,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087732677] [2021-05-02 15:05:30,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087732677] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:05:30,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:05:30,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:05:30,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045520235] [2021-05-02 15:05:30,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:05:30,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:05:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:05:30,569 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:05:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:30,713 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2021-05-02 15:05:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:05:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:05:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:30,721 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:05:30,721 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:05:30,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:05:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:05:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:05:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:05:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 15:05:30,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 15:05:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:30,755 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 15:05:30,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:05:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 15:05:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:05:30,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:30,757 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:30,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:05:30,757 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times [2021-05-02 15:05:30,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:30,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949619861] [2021-05-02 15:05:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:30,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:30,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272517547] [2021-05-02 15:05:30,775 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 15:05:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:05:30,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:05:31,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:31,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949619861] [2021-05-02 15:05:31,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:31,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272517547] [2021-05-02 15:05:31,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272517547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:31,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:31,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:05:31,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20539715] [2021-05-02 15:05:31,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:05:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:05:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:05:31,321 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:05:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:35,681 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 15:05:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:05:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:05:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:35,683 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:05:35,683 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 15:05:35,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:05:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 15:05:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 15:05:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:05:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 15:05:35,695 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 15:05:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:35,696 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 15:05:35,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:05:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 15:05:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:05:35,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:35,697 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:35,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:05:35,920 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash 936002262, now seen corresponding path program 1 times [2021-05-02 15:05:35,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:35,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303311146] [2021-05-02 15:05:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:35,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:35,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054806512] [2021-05-02 15:05:35,936 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 15:05:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:05:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:05:36,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:36,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303311146] [2021-05-02 15:05:36,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:36,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054806512] [2021-05-02 15:05:36,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054806512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:36,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:36,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:05:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405080490] [2021-05-02 15:05:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:05:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:05:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:05:36,322 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:05:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:42,575 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-02 15:05:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:05:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:05:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:42,587 INFO L225 Difference]: With dead ends: 63 [2021-05-02 15:05:42,588 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:05:42,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:05:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:05:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:05:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.135135135135135) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:05:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:05:42,620 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 39 [2021-05-02 15:05:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:42,620 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:05:42,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:05:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:05:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:05:42,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:42,624 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:42,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:42,835 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash 584476005, now seen corresponding path program 1 times [2021-05-02 15:05:42,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:42,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176055288] [2021-05-02 15:05:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:42,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:42,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305248375] [2021-05-02 15:05:42,863 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 15:05:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:05:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:05:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:42,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:42,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:43,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,182 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:05:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:05:47,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176055288] [2021-05-02 15:05:47,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305248375] [2021-05-02 15:05:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305248375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:47,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:47,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:05:47,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9475132] [2021-05-02 15:05:47,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:05:47,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:05:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:05:47,373 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:05:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:50,427 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-02 15:05:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:05:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 15:05:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:50,429 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:05:50,429 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:05:50,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4176.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:05:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:05:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 15:05:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (20), 14 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:05:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-05-02 15:05:50,446 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 47 [2021-05-02 15:05:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:50,447 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-05-02 15:05:50,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:05:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-05-02 15:05:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:05:50,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:50,448 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:50,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:50,671 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash -629102554, now seen corresponding path program 2 times [2021-05-02 15:05:50,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:50,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345914843] [2021-05-02 15:05:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:50,690 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:50,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821842764] [2021-05-02 15:05:50,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:50,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:05:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:05:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:05:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 15:05:51,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:51,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345914843] [2021-05-02 15:05:51,074 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:51,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821842764] [2021-05-02 15:05:51,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821842764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:51,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:51,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:05:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320523711] [2021-05-02 15:05:51,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:05:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:05:51,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:05:51,075 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:05:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:05:54,494 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2021-05-02 15:05:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:05:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 15:05:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:05:54,496 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:05:54,496 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:05:54,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:05:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:05:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-02 15:05:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 73 states have internal predecessors, (74), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 17 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:05:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2021-05-02 15:05:54,514 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 54 [2021-05-02 15:05:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:05:54,514 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2021-05-02 15:05:54,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 15:05:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2021-05-02 15:05:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:05:54,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:05:54,516 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:05:54,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:54,727 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:05:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:05:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1844116037, now seen corresponding path program 3 times [2021-05-02 15:05:54,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:05:54,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414909003] [2021-05-02 15:05:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:05:54,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:05:54,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109568003] [2021-05-02 15:05:54,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:05:54,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:05:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:05:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:05:54,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:05:54,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:54,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:05:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:05:55,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:05:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414909003] [2021-05-02 15:05:55,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:05:55,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109568003] [2021-05-02 15:05:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109568003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:05:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:05:55,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:05:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552755501] [2021-05-02 15:05:55,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:05:55,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:05:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:05:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:05:55,346 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:06:13,740 WARN L205 SmtUtils]: Spent 12.74 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 15:06:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:25,171 INFO L93 Difference]: Finished difference Result 219 states and 263 transitions. [2021-05-02 15:06:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:06:25,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 15:06:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:25,177 INFO L225 Difference]: With dead ends: 219 [2021-05-02 15:06:25,178 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 15:06:25,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 13129.2ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:06:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 15:06:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 173. [2021-05-02 15:06:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 114 states have (on average 1.1403508771929824) internal successors, (130), 126 states have internal predecessors, (130), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (38), 26 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 15:06:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2021-05-02 15:06:25,224 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 61 [2021-05-02 15:06:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:25,224 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2021-05-02 15:06:25,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:06:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2021-05-02 15:06:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:06:25,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:25,226 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:06:25,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:06:25,453 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1766314924, now seen corresponding path program 1 times [2021-05-02 15:06:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:25,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910268248] [2021-05-02 15:06:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:25,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:25,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561169915] [2021-05-02 15:06:25,466 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 15:06:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:06:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 15:06:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:25,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:25,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:39,703 WARN L205 SmtUtils]: Spent 9.44 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:06:39,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:39,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:45,843 WARN L205 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 15:06:45,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:45,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,090 WARN L205 SmtUtils]: Spent 7.92 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:06:56,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,000 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:07:20,607 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:07:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:20,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 38 refuted. 2 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 15:07:20,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910268248] [2021-05-02 15:07:20,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:20,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561169915] [2021-05-02 15:07:20,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561169915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:20,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:20,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:07:20,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588891599] [2021-05-02 15:07:20,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:07:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:07:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 15:07:20,679 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:08:09,791 WARN L205 SmtUtils]: Spent 18.62 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 15:08:21,944 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 15:08:54,809 WARN L205 SmtUtils]: Spent 26.34 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 15:10:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:10:27,702 INFO L93 Difference]: Finished difference Result 241 states and 292 transitions. [2021-05-02 15:10:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:10:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 75 [2021-05-02 15:10:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:10:27,730 INFO L225 Difference]: With dead ends: 241 [2021-05-02 15:10:27,730 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 15:10:27,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 111960.9ms TimeCoverageRelationStatistics Valid=76, Invalid=334, Unknown=10, NotChecked=0, Total=420 [2021-05-02 15:10:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 15:10:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-05-02 15:10:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 169 states have internal predecessors, (179), 53 states have call successors, (53), 25 states have call predecessors, (53), 24 states have return successors, (52), 38 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 15:10:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 284 transitions. [2021-05-02 15:10:27,768 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 284 transitions. Word has length 75 [2021-05-02 15:10:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:10:27,768 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 284 transitions. [2021-05-02 15:10:27,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:10:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 284 transitions. [2021-05-02 15:10:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 15:10:27,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:27,771 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:10:27,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:10:27,985 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1363450014, now seen corresponding path program 1 times [2021-05-02 15:10:27,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:27,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052639780] [2021-05-02 15:10:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:10:27,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:10:27,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36036233] [2021-05-02 15:10:27,997 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 15:10:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:10:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2021-05-02 15:10:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:10:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:10:28,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:10:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052639780] [2021-05-02 15:10:28,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:10:28,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36036233] [2021-05-02 15:10:28,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36036233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:10:28,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:10:28,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:10:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250828300] [2021-05-02 15:10:28,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:10:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:10:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:10:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:10:28,186 INFO L87 Difference]: Start difference. First operand 233 states and 284 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:10:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:10:28,238 INFO L93 Difference]: Finished difference Result 471 states and 596 transitions. [2021-05-02 15:10:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:10:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 82 [2021-05-02 15:10:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:10:28,241 INFO L225 Difference]: With dead ends: 471 [2021-05-02 15:10:28,241 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 15:10:28,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:10:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 15:10:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-02 15:10:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 196 states have (on average 1.1581632653061225) internal successors, (227), 201 states have internal predecessors, (227), 69 states have call successors, (69), 25 states have call predecessors, (69), 24 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 15:10:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 364 transitions. [2021-05-02 15:10:28,299 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 364 transitions. Word has length 82 [2021-05-02 15:10:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:10:28,300 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 364 transitions. [2021-05-02 15:10:28,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:10:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 364 transitions. [2021-05-02 15:10:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 15:10:28,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:28,302 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:10:28,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:10:28,527 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash 590108599, now seen corresponding path program 2 times [2021-05-02 15:10:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:28,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379853187] [2021-05-02 15:10:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:10:28,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:10:28,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377007507] [2021-05-02 15:10:28,535 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 15:10:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:10:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:10:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:10:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:10:28,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:28,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 15:10:29,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:10:29,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379853187] [2021-05-02 15:10:29,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:10:29,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377007507] [2021-05-02 15:10:29,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377007507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:10:29,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:10:29,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:10:29,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297047371] [2021-05-02 15:10:29,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:10:29,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:10:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:10:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:10:29,009 INFO L87 Difference]: Start difference. First operand 290 states and 364 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 15:10:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:10:29,644 INFO L93 Difference]: Finished difference Result 485 states and 626 transitions. [2021-05-02 15:10:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:10:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 82 [2021-05-02 15:10:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:10:29,647 INFO L225 Difference]: With dead ends: 485 [2021-05-02 15:10:29,647 INFO L226 Difference]: Without dead ends: 327 [2021-05-02 15:10:29,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:10:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-02 15:10:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2021-05-02 15:10:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 220 states have (on average 1.1454545454545455) internal successors, (252), 225 states have internal predecessors, (252), 81 states have call successors, (81), 25 states have call predecessors, (81), 24 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2021-05-02 15:10:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 413 transitions. [2021-05-02 15:10:29,696 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 413 transitions. Word has length 82 [2021-05-02 15:10:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:10:29,696 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 413 transitions. [2021-05-02 15:10:29,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 15:10:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 413 transitions. [2021-05-02 15:10:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:10:29,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:29,698 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:10:29,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:10:29,913 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2089422831, now seen corresponding path program 1 times [2021-05-02 15:10:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:29,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008134387] [2021-05-02 15:10:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:10:29,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:10:29,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833711633] [2021-05-02 15:10:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:10:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:10:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 15:10:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:10:30,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:30,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 37 refuted. 4 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:10:32,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:10:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008134387] [2021-05-02 15:10:32,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:10:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833711633] [2021-05-02 15:10:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833711633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:10:32,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:10:32,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:10:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121924392] [2021-05-02 15:10:32,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:10:32,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:10:32,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:10:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 15:10:32,893 INFO L87 Difference]: Start difference. First operand 326 states and 413 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:11:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:23,445 INFO L93 Difference]: Finished difference Result 414 states and 520 transitions. [2021-05-02 15:11:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:11:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-05-02 15:11:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:23,448 INFO L225 Difference]: With dead ends: 414 [2021-05-02 15:11:23,448 INFO L226 Difference]: Without dead ends: 412 [2021-05-02 15:11:23,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 5870.5ms TimeCoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-05-02 15:11:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-02 15:11:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-05-02 15:11:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 280 states have (on average 1.1464285714285714) internal successors, (321), 285 states have internal predecessors, (321), 99 states have call successors, (99), 33 states have call predecessors, (99), 32 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2021-05-02 15:11:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 518 transitions. [2021-05-02 15:11:23,525 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 518 transitions. Word has length 89 [2021-05-02 15:11:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:23,527 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 518 transitions. [2021-05-02 15:11:23,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 15:11:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 518 transitions. [2021-05-02 15:11:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:11:23,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:23,529 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:11:23,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:23,730 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 844643163, now seen corresponding path program 2 times [2021-05-02 15:11:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:23,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844925507] [2021-05-02 15:11:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:23,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:23,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448328581] [2021-05-02 15:11:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:23,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:11:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:11:23,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:11:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:23,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-05-02 15:11:23,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844925507] [2021-05-02 15:11:23,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448328581] [2021-05-02 15:11:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448328581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:23,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:23,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 15:11:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114046400] [2021-05-02 15:11:23,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:11:23,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:11:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:11:23,972 INFO L87 Difference]: Start difference. First operand 412 states and 518 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:11:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:24,057 INFO L93 Difference]: Finished difference Result 709 states and 902 transitions. [2021-05-02 15:11:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:11:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-05-02 15:11:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:24,060 INFO L225 Difference]: With dead ends: 709 [2021-05-02 15:11:24,060 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 15:11:24,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:11:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 15:11:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 227. [2021-05-02 15:11:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 155 states have (on average 1.096774193548387) internal successors, (170), 160 states have internal predecessors, (170), 44 states have call successors, (44), 28 states have call predecessors, (44), 27 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 15:11:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 257 transitions. [2021-05-02 15:11:24,088 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 257 transitions. Word has length 89 [2021-05-02 15:11:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:24,088 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 257 transitions. [2021-05-02 15:11:24,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:11:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 257 transitions. [2021-05-02 15:11:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:11:24,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:24,089 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:11:24,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:24,292 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1542246767, now seen corresponding path program 3 times [2021-05-02 15:11:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027583448] [2021-05-02 15:11:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:24,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:24,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341776350] [2021-05-02 15:11:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:24,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:11:24,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:11:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:11:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:24,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:24,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 15:11:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027583448] [2021-05-02 15:11:24,576 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341776350] [2021-05-02 15:11:24,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341776350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:24,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:24,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:11:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133234246] [2021-05-02 15:11:24,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:11:24,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:11:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:11:24,577 INFO L87 Difference]: Start difference. First operand 227 states and 257 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 15:11:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:33,559 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2021-05-02 15:11:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:11:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-02 15:11:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:33,561 INFO L225 Difference]: With dead ends: 241 [2021-05-02 15:11:33,561 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 15:11:33,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:11:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 15:11:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-05-02 15:11:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 169 states have internal predecessors, (179), 44 states have call successors, (44), 31 states have call predecessors, (44), 30 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 15:11:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 266 transitions. [2021-05-02 15:11:33,587 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 266 transitions. Word has length 89 [2021-05-02 15:11:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:33,587 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 266 transitions. [2021-05-02 15:11:33,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 15:11:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 266 transitions. [2021-05-02 15:11:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 15:11:33,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:33,588 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:11:33,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:11:33,805 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1932866046, now seen corresponding path program 4 times [2021-05-02 15:11:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:33,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683332760] [2021-05-02 15:11:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:33,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:33,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902536531] [2021-05-02 15:11:33,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:33,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:11:33,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:11:33,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:11:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:33,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:33,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:52,817 WARN L205 SmtUtils]: Spent 18.88 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 15:11:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,403 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:11:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:58,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,120 WARN L205 SmtUtils]: Spent 5.59 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:12:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:04,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 38 proven. 39 refuted. 3 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-02 15:12:07,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683332760] [2021-05-02 15:12:07,686 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902536531] [2021-05-02 15:12:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902536531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:12:07,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:12:07,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:12:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402935764] [2021-05-02 15:12:07,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:12:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:12:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=88, Unknown=1, NotChecked=0, Total=110 [2021-05-02 15:12:07,687 INFO L87 Difference]: Start difference. First operand 239 states and 266 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 15:12:14,252 WARN L205 SmtUtils]: Spent 6.41 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 15:12:25,834 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:12:31,456 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 15:12:47,854 WARN L205 SmtUtils]: Spent 11.11 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 15:12:53,516 WARN L205 SmtUtils]: Spent 5.58 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 15:12:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:12:53,555 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2021-05-02 15:12:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:12:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2021-05-02 15:12:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:12:53,557 INFO L225 Difference]: With dead ends: 302 [2021-05-02 15:12:53,557 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 15:12:53,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 67612.6ms TimeCoverageRelationStatistics Valid=54, Invalid=217, Unknown=1, NotChecked=0, Total=272 [2021-05-02 15:12:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 15:12:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-02 15:12:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 173 states have (on average 1.0867052023121386) internal successors, (188), 179 states have internal predecessors, (188), 49 states have call successors, (49), 31 states have call predecessors, (49), 30 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 15:12:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 285 transitions. [2021-05-02 15:12:53,590 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 285 transitions. Word has length 103 [2021-05-02 15:12:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:12:53,590 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 285 transitions. [2021-05-02 15:12:53,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 15:12:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 285 transitions. [2021-05-02 15:12:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 15:12:53,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:12:53,592 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:12:53,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:12:53,805 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:12:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:12:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash 185225293, now seen corresponding path program 5 times [2021-05-02 15:12:53,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:12:53,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483989051] [2021-05-02 15:12:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:12:53,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:12:53,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221565868] [2021-05-02 15:12:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:12:53,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 15:12:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:12:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 15:12:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:12:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:53,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:53,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 15:12:54,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:54,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483989051] [2021-05-02 15:12:54,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:54,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221565868] [2021-05-02 15:12:54,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221565868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:12:54,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:12:54,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:12:54,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779853842] [2021-05-02 15:12:54,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:12:54,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:54,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:12:54,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:12:54,218 INFO L87 Difference]: Start difference. First operand 253 states and 285 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:12:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:12:54,458 INFO L93 Difference]: Finished difference Result 324 states and 380 transitions. [2021-05-02 15:12:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:12:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 110 [2021-05-02 15:12:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:12:54,460 INFO L225 Difference]: With dead ends: 324 [2021-05-02 15:12:54,460 INFO L226 Difference]: Without dead ends: 295 [2021-05-02 15:12:54,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:12:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-02 15:12:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 268. [2021-05-02 15:12:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 183 states have (on average 1.1038251366120218) internal successors, (202), 188 states have internal predecessors, (202), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 15:12:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 311 transitions. [2021-05-02 15:12:54,492 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 311 transitions. Word has length 110 [2021-05-02 15:12:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:12:54,492 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 311 transitions. [2021-05-02 15:12:54,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:12:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 311 transitions. [2021-05-02 15:12:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 15:12:54,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:12:54,494 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:12:54,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:12:54,699 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:12:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:12:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 936499883, now seen corresponding path program 6 times [2021-05-02 15:12:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:12:54,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135002325] [2021-05-02 15:12:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:12:54,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:12:54,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254356930] [2021-05-02 15:12:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:12:55,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 15:12:55,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:12:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 15:12:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:12:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,759 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-05-02 15:12:55,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:55,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:58,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:58,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:58,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:58,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:01,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:02,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:02,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:02,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:02,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:14,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:23,279 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:13:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:23,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 15:13:23,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:23,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135002325] [2021-05-02 15:13:23,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:23,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254356930] [2021-05-02 15:13:23,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254356930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:23,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:23,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:13:23,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873220225] [2021-05-02 15:13:23,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:13:23,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:23,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:13:23,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=200, Unknown=6, NotChecked=0, Total=240 [2021-05-02 15:13:23,471 INFO L87 Difference]: Start difference. First operand 268 states and 311 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 15:16:48,442 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-02 15:17:02,491 WARN L205 SmtUtils]: Spent 10.64 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:17:24,176 WARN L205 SmtUtils]: Spent 17.07 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:18:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:00,752 INFO L93 Difference]: Finished difference Result 357 states and 423 transitions. [2021-05-02 15:18:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:18:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 110 [2021-05-02 15:18:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:00,754 INFO L225 Difference]: With dead ends: 357 [2021-05-02 15:18:00,754 INFO L226 Difference]: Without dead ends: 355 [2021-05-02 15:18:00,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 75502.1ms TimeCoverageRelationStatistics Valid=73, Invalid=467, Unknown=12, NotChecked=0, Total=552 [2021-05-02 15:18:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-02 15:18:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 351. [2021-05-02 15:18:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 240 states have (on average 1.1208333333333333) internal successors, (269), 247 states have internal predecessors, (269), 74 states have call successors, (74), 37 states have call predecessors, (74), 36 states have return successors, (73), 66 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 15:18:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 416 transitions. [2021-05-02 15:18:00,797 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 416 transitions. Word has length 110 [2021-05-02 15:18:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:00,797 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 416 transitions. [2021-05-02 15:18:00,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 15:18:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 416 transitions. [2021-05-02 15:18:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 15:18:00,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:00,799 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:01,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:01,004 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 502868352, now seen corresponding path program 7 times [2021-05-02 15:18:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:01,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190153908] [2021-05-02 15:18:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:01,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:01,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053151732] [2021-05-02 15:18:01,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:18:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:01,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-05-02 15:18:01,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:01,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190153908] [2021-05-02 15:18:01,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:01,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053151732] [2021-05-02 15:18:01,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053151732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:01,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:01,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:18:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990978696] [2021-05-02 15:18:01,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:18:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:18:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:18:01,320 INFO L87 Difference]: Start difference. First operand 351 states and 416 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:18:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:01,536 INFO L93 Difference]: Finished difference Result 455 states and 554 transitions. [2021-05-02 15:18:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:18:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 117 [2021-05-02 15:18:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:01,540 INFO L225 Difference]: With dead ends: 455 [2021-05-02 15:18:01,541 INFO L226 Difference]: Without dead ends: 354 [2021-05-02 15:18:01,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:18:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-02 15:18:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 319. [2021-05-02 15:18:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 218 states have (on average 1.1192660550458715) internal successors, (244), 223 states have internal predecessors, (244), 68 states have call successors, (68), 33 states have call predecessors, (68), 32 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 15:18:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 379 transitions. [2021-05-02 15:18:01,581 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 379 transitions. Word has length 117 [2021-05-02 15:18:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:01,581 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 379 transitions. [2021-05-02 15:18:01,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:18:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 379 transitions. [2021-05-02 15:18:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 15:18:01,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:01,582 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:01,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:18:01,802 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1454434284, now seen corresponding path program 8 times [2021-05-02 15:18:01,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:01,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729971515] [2021-05-02 15:18:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:01,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:01,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519940602] [2021-05-02 15:18:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:01,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:18:01,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:18:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:01,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 38 proven. 69 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-02 15:18:02,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729971515] [2021-05-02 15:18:02,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519940602] [2021-05-02 15:18:02,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519940602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:02,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:02,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:18:02,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506815161] [2021-05-02 15:18:02,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:18:02,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:18:02,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:18:02,456 INFO L87 Difference]: Start difference. First operand 319 states and 379 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 10 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-05-02 15:18:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:08,146 INFO L93 Difference]: Finished difference Result 390 states and 473 transitions. [2021-05-02 15:18:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:18:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 10 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) Word has length 117 [2021-05-02 15:18:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:08,149 INFO L225 Difference]: With dead ends: 390 [2021-05-02 15:18:08,149 INFO L226 Difference]: Without dead ends: 346 [2021-05-02 15:18:08,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:18:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-02 15:18:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 334. [2021-05-02 15:18:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 228 states have (on average 1.118421052631579) internal successors, (255), 233 states have internal predecessors, (255), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (72), 67 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 15:18:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 400 transitions. [2021-05-02 15:18:08,194 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 400 transitions. Word has length 117 [2021-05-02 15:18:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:08,194 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 400 transitions. [2021-05-02 15:18:08,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 10 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2021-05-02 15:18:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 400 transitions. [2021-05-02 15:18:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 15:18:08,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:08,196 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:08,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:18:08,418 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 964600459, now seen corresponding path program 9 times [2021-05-02 15:18:08,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:08,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756207375] [2021-05-02 15:18:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:08,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47606588] [2021-05-02 15:18:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:08,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:18:08,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:18:08,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:18:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:08,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2021-05-02 15:18:09,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756207375] [2021-05-02 15:18:09,177 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47606588] [2021-05-02 15:18:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47606588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:09,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:09,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:18:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840371586] [2021-05-02 15:18:09,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:18:09,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:18:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:18:09,178 INFO L87 Difference]: Start difference. First operand 334 states and 400 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:18:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:13,503 INFO L93 Difference]: Finished difference Result 334 states and 400 transitions. [2021-05-02 15:18:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:18:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2021-05-02 15:18:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:13,505 INFO L225 Difference]: With dead ends: 334 [2021-05-02 15:18:13,505 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:18:13,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:18:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:18:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:18:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:18:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:18:13,506 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 124 [2021-05-02 15:18:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:13,506 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:18:13,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:18:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:18:13,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:18:13,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:18:13,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:18:13,854 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 165 [2021-05-02 15:18:14,035 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 67 [2021-05-02 15:18:14,184 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 144 [2021-05-02 15:18:14,604 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 67 [2021-05-02 15:18:18,966 WARN L205 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 53 DAG size of output: 33