/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/prod4br-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:16:24,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:16:24,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:16:24,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:16:24,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:16:24,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:16:24,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:16:24,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:16:24,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:16:24,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:16:24,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:16:24,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:16:24,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:16:24,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:16:24,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:16:24,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:16:24,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:16:24,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:16:24,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:16:24,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:16:24,342 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 16:16:24,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:16:24,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:16:24,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:16:24,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:16:24,372 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:16:24,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:16:24,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:16:24,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:16:24,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:16:24,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:16:24,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:16:24,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:16:24,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:16:24,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:16:24,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:16:24,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:16:24,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:16:24,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:16:24,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:16:24,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:16:24,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:16:24,706 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:16:24,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-05-02 16:16:24,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acebfe837/2a6037c5b80e4c7aa3dfa90c307906d7/FLAG697a7621b [2021-05-02 16:16:25,135 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:16:25,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2021-05-02 16:16:25,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acebfe837/2a6037c5b80e4c7aa3dfa90c307906d7/FLAG697a7621b [2021-05-02 16:16:25,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acebfe837/2a6037c5b80e4c7aa3dfa90c307906d7 [2021-05-02 16:16:25,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:16:25,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:16:25,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:16:25,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:16:25,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:16:25,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bcadbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25, skipping insertion in model container [2021-05-02 16:16:25,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:16:25,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:16:25,296 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/prod4br-ll_unwindbound5.c[524,537] [2021-05-02 16:16:25,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:16:25,330 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:16:25,348 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/prod4br-ll_unwindbound5.c[524,537] [2021-05-02 16:16:25,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:16:25,393 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:16:25,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25 WrapperNode [2021-05-02 16:16:25,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:16:25,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:16:25,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:16:25,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:16:25,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (1/1) ... [2021-05-02 16:16:25,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:16:25,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:16:25,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:16:25,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:16:25,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (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 16:16:25,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:16:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:16:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:16:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:16:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:16:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:16:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:16:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:16:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:16:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:16:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:16:25,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:16:25,721 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:16:25,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:16:25 BoogieIcfgContainer [2021-05-02 16:16:25,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:16:25,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:16:25,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:16:25,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:16:25,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:16:25" (1/3) ... [2021-05-02 16:16:25,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f8e8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:16:25, skipping insertion in model container [2021-05-02 16:16:25,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:16:25" (2/3) ... [2021-05-02 16:16:25,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f8e8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:16:25, skipping insertion in model container [2021-05-02 16:16:25,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:16:25" (3/3) ... [2021-05-02 16:16:25,726 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2021-05-02 16:16:25,730 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:16:25,732 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:16:25,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:16:25,775 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:16:25,778 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:16:25,779 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:16:25,783 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:16:25,784 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:16:25,784 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:16:25,784 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:16:25,784 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:16:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:16:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:16:25,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:25,799 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:25,799 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:25,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-02 16:16:25,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:25,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966228156] [2021-05-02 16:16:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:25,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:16:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:26,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:16:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:26,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:26,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966228156] [2021-05-02 16:16:26,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966228156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:16:26,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:16:26,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:16:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341538367] [2021-05-02 16:16:26,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:16:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:16:26,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:16:26,032 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:16:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:26,127 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-02 16:16:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:16:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:16:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:26,134 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:16:26,135 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:16:26,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:16:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:16:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 16:16:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 16:16:26,175 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 16:16:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:26,175 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 16:16:26,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:16:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 16:16:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:16:26,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:26,177 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:26,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:16:26,178 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-02 16:16:26,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:26,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157776553] [2021-05-02 16:16:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:26,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:26,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729748792] [2021-05-02 16:16:26,217 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 16:16:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:16:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:26,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:26,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:26,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157776553] [2021-05-02 16:16:26,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:26,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729748792] [2021-05-02 16:16:26,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729748792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:16:26,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:16:26,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:16:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115318025] [2021-05-02 16:16:26,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:16:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:16:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:16:26,387 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:16:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:26,412 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 16:16:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:16:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:16:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:26,413 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:16:26,413 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:16:26,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:16:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:16:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:16:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 16:16:26,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 16:16:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:26,418 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 16:16:26,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:16:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 16:16:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:16:26,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:26,419 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:26,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:16:26,620 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2021-05-02 16:16:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:26,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777608604] [2021-05-02 16:16:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:26,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844703080] [2021-05-02 16:16:26,629 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 16:16:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:26,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:16:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:26,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777608604] [2021-05-02 16:16:26,767 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844703080] [2021-05-02 16:16:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844703080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:16:26,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:16:26,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:16:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421007405] [2021-05-02 16:16:26,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:16:26,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:26,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:16:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:16:26,769 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:16:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:26,875 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-02 16:16:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:16:26,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:16:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:26,877 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:16:26,877 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 16:16:26,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:16:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 16:16:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 16:16:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:16:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 16:16:26,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 16:16:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:26,883 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 16:16:26,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:16:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 16:16:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:16:26,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:26,884 INFO L523 BasicCegarLoop]: trace histogram [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 16:16:27,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:27,101 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2021-05-02 16:16:27,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:27,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288647884] [2021-05-02 16:16:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:27,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:27,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175567504] [2021-05-02 16:16:27,124 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 16:16:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:16:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:27,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:27,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288647884] [2021-05-02 16:16:27,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175567504] [2021-05-02 16:16:27,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175567504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:27,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:27,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:16:27,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685878330] [2021-05-02 16:16:27,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:16:27,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:16:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:16:27,378 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:27,937 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-02 16:16:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:16:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:16:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:27,939 INFO L225 Difference]: With dead ends: 51 [2021-05-02 16:16:27,939 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:16:27,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:16:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:16:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 16:16:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:16:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 16:16:27,945 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 16:16:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:27,945 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 16:16:27,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 16:16:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:16:27,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:27,946 INFO L523 BasicCegarLoop]: trace histogram [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 16:16:28,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:28,162 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:28,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2021-05-02 16:16:28,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:28,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759904341] [2021-05-02 16:16:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:28,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:28,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451378688] [2021-05-02 16:16:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:16:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:28,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759904341] [2021-05-02 16:16:28,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:28,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451378688] [2021-05-02 16:16:28,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451378688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:28,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:28,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:16:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519055492] [2021-05-02 16:16:28,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:16:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:16:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:16:28,294 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:16:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:28,325 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 16:16:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:16:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 16:16:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:28,326 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:16:28,326 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:16:28,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:16:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:16:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 16:16:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:16:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-02 16:16:28,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-02 16:16:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:28,347 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-02 16:16:28,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:16:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-02 16:16:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:16:28,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:28,347 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:28,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:28,564 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2021-05-02 16:16:28,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:28,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186200528] [2021-05-02 16:16:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:28,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:28,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106673323] [2021-05-02 16:16:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:16:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:28,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186200528] [2021-05-02 16:16:28,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:28,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106673323] [2021-05-02 16:16:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106673323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:28,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:28,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:16:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463561890] [2021-05-02 16:16:28,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:16:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:16:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:16:28,877 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:33,322 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-02 16:16:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:16:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 16:16:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:33,323 INFO L225 Difference]: With dead ends: 63 [2021-05-02 16:16:33,323 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:16:33,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:16:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 16:16:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:16:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 16:16:33,329 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-02 16:16:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:33,329 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 16:16:33,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 16:16:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:16:33,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:33,330 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:33,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:33,549 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2021-05-02 16:16:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:33,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383783981] [2021-05-02 16:16:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:33,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:33,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549286766] [2021-05-02 16:16:33,557 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 16:16:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:16:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:33,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:33,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:33,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:33,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:33,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383783981] [2021-05-02 16:16:33,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:33,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549286766] [2021-05-02 16:16:33,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549286766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:33,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:33,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:16:33,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963687973] [2021-05-02 16:16:33,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:16:33,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:16:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:16:33,918 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:38,324 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 16:16:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:16:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:16:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:38,325 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:16:38,325 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 16:16:38,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 16:16:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 16:16:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:16:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-02 16:16:38,331 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-02 16:16:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:38,331 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-02 16:16:38,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-02 16:16:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:16:38,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:38,332 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:38,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:38,533 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -293334773, now seen corresponding path program 1 times [2021-05-02 16:16:38,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389616444] [2021-05-02 16:16:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:38,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:38,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640418126] [2021-05-02 16:16:38,540 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 16:16:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 16:16:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:38,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:38,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:38,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:38,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:38,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389616444] [2021-05-02 16:16:38,772 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640418126] [2021-05-02 16:16:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640418126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:16:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597161398] [2021-05-02 16:16:38,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:16:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:16:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:16:38,773 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:43,203 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-05-02 16:16:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:16:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:16:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:43,204 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:16:43,204 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:16:43,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:16:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-02 16:16:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:16:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-02 16:16:43,211 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-02 16:16:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:43,211 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-02 16:16:43,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-02 16:16:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:16:43,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:43,212 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:43,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:43,437 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1481672589, now seen corresponding path program 1 times [2021-05-02 16:16:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572146648] [2021-05-02 16:16:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:43,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:43,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312039235] [2021-05-02 16:16:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:43,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:16:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:43,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:43,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:43,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:43,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572146648] [2021-05-02 16:16:43,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312039235] [2021-05-02 16:16:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312039235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:43,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:43,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:16:43,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881514138] [2021-05-02 16:16:43,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:16:43,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:16:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:16:43,635 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:43,814 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-05-02 16:16:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:16:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:16:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:43,815 INFO L225 Difference]: With dead ends: 87 [2021-05-02 16:16:43,816 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:16:43,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:16:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:16:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 16:16:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:16:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-02 16:16:43,822 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-02 16:16:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:43,822 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-02 16:16:43,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-02 16:16:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 16:16:43,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:43,823 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 16:16:44,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:16:44,024 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1680888588, now seen corresponding path program 1 times [2021-05-02 16:16:44,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:44,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138903113] [2021-05-02 16:16:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:44,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287551444] [2021-05-02 16:16:44,029 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 16:16:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 16:16:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:16:44,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138903113] [2021-05-02 16:16:44,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287551444] [2021-05-02 16:16:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287551444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:16:44,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:16:44,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:16:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094350459] [2021-05-02 16:16:44,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:16:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:16:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:16:44,154 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:44,229 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-05-02 16:16:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:16:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 16:16:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:44,230 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:16:44,230 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 16:16:44,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:16:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 16:16:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-02 16:16:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:16:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-02 16:16:44,237 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-02 16:16:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:44,237 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-02 16:16:44,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-02 16:16:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:16:44,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:44,238 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 16:16:44,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:44,453 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:44,453 INFO L82 PathProgramCache]: Analyzing trace with hash 368374993, now seen corresponding path program 1 times [2021-05-02 16:16:44,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:44,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130541250] [2021-05-02 16:16:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:44,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051565994] [2021-05-02 16:16:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:16:44,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:44,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:16:44,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130541250] [2021-05-02 16:16:44,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051565994] [2021-05-02 16:16:44,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051565994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:44,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:44,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:16:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490553602] [2021-05-02 16:16:44,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:16:44,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:16:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:44,765 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:47,174 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-02 16:16:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:16:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:16:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:47,175 INFO L225 Difference]: With dead ends: 103 [2021-05-02 16:16:47,175 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:16:47,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:16:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:16:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-02 16:16:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:16:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-02 16:16:47,183 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-02 16:16:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:47,183 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-02 16:16:47,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-02 16:16:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:16:47,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:47,184 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-02 16:16:47,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 16:16:47,397 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -218431021, now seen corresponding path program 1 times [2021-05-02 16:16:47,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:47,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751977226] [2021-05-02 16:16:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:47,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:47,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460777428] [2021-05-02 16:16:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:16:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:16:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:16:47,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751977226] [2021-05-02 16:16:47,659 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:47,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460777428] [2021-05-02 16:16:47,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460777428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:47,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:47,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:16:47,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594885550] [2021-05-02 16:16:47,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:16:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:16:47,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:16:47,660 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:48,226 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2021-05-02 16:16:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 16:16:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:16:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:48,227 INFO L225 Difference]: With dead ends: 123 [2021-05-02 16:16:48,227 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:16:48,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:16:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:16:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-02 16:16:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 79 states have internal predecessors, (101), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:16:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-05-02 16:16:48,234 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 35 [2021-05-02 16:16:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:48,234 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-05-02 16:16:48,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-05-02 16:16:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:16:48,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:48,235 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:48,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:16:48,448 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash 604176890, now seen corresponding path program 2 times [2021-05-02 16:16:48,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:48,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969974030] [2021-05-02 16:16:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:48,453 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:48,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746290747] [2021-05-02 16:16:48,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:48,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:16:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:16:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:16:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:48,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:48,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:48,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969974030] [2021-05-02 16:16:48,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:48,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746290747] [2021-05-02 16:16:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746290747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:16:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758437003] [2021-05-02 16:16:48,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:16:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:48,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:16:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:16:48,575 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:48,619 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2021-05-02 16:16:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:16:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:16:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:48,624 INFO L225 Difference]: With dead ends: 128 [2021-05-02 16:16:48,624 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 16:16:48,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:16:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 16:16:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 16:16:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 96 states have internal predecessors, (125), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:16:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-05-02 16:16:48,633 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2021-05-02 16:16:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:48,633 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-05-02 16:16:48,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-05-02 16:16:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:16:48,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:48,637 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:48,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:48,841 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 605964350, now seen corresponding path program 2 times [2021-05-02 16:16:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:48,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746166237] [2021-05-02 16:16:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:48,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:48,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364721706] [2021-05-02 16:16:48,845 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 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 16:16:48,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:16:48,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:16:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 16:16:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:06,093 WARN L205 SmtUtils]: Spent 15.03 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 16:17:18,246 WARN L205 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 16:17:18,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:18,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:17:19,558 WARN L159 QuantifierPusher]: Ignoring assumption.