/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/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:01:51,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:01:51,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:01:51,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:01:51,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:01:51,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:01:51,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:01:51,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:01:51,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:01:51,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:01:51,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:01:51,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:01:51,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:01:51,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:01:51,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:01:51,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:01:51,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:01:51,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:01:51,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:01:51,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:01:51,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:01:51,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:01:51,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:01:51,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:01:51,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:01:51,251 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:01:51,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:01:51,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:01:51,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:01:51,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:01:51,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:01:51,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:01:51,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:01:51,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:01:51,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:01:51,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:01:51,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:01:51,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:01:51,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:01:51,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:01:51,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:01:51,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:01:51,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:01:51,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:01:51,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:01:51,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:01:51,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:01:51,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:01:51,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:01:51,609 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:01:51,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2021-05-02 13:01:51,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4736ace0c/f84c5320593143f6b218315617dba027/FLAGaa2a7e8ec [2021-05-02 13:01:52,069 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:01:52,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2021-05-02 13:01:52,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4736ace0c/f84c5320593143f6b218315617dba027/FLAGaa2a7e8ec [2021-05-02 13:01:52,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4736ace0c/f84c5320593143f6b218315617dba027 [2021-05-02 13:01:52,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:01:52,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:01:52,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:52,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:01:52,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:01:52,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa3b3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52, skipping insertion in model container [2021-05-02 13:01:52,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:01:52,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:01:52,609 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2021-05-02 13:01:52,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:52,630 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:01:52,640 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2021-05-02 13:01:52,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:52,671 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:01:52,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52 WrapperNode [2021-05-02 13:01:52,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:52,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:01:52,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:01:52,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:01:52,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... [2021-05-02 13:01:52,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:01:52,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:01:52,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:01:52,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:01:52,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:01:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:01:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:01:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:01:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:01:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:01:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:01:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:01:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:01:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:01:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 13:01:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:01:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:01:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:01:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:01:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:01:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:01:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:01:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:01:53,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:01:53,038 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-02 13:01:53,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:53 BoogieIcfgContainer [2021-05-02 13:01:53,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:01:53,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:01:53,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:01:53,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:01:53,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:01:52" (1/3) ... [2021-05-02 13:01:53,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f341892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:53, skipping insertion in model container [2021-05-02 13:01:53,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:52" (2/3) ... [2021-05-02 13:01:53,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f341892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:53, skipping insertion in model container [2021-05-02 13:01:53,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:53" (3/3) ... [2021-05-02 13:01:53,046 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.c [2021-05-02 13:01:53,050 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:01:53,053 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:01:53,068 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:01:53,086 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:01:53,086 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:01:53,086 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:01:53,087 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:01:53,087 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:01:53,087 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:01:53,087 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:01:53,087 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:01:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:01:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:01:53,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:53,115 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 13:01:53,115 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1370249117, now seen corresponding path program 1 times [2021-05-02 13:01:53,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:53,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453885324] [2021-05-02 13:01:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:53,342 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 13:01:53,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:53,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453885324] [2021-05-02 13:01:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453885324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:53,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:53,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:01:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697363902] [2021-05-02 13:01:53,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:01:53,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:53,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:01:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:01:53,368 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:53,443 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2021-05-02 13:01:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:01:53,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:01:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:53,450 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:01:53,451 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 13:01:53,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:01:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 13:01:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 13:01:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-05-02 13:01:53,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 17 [2021-05-02 13:01:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-05-02 13:01:53,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-05-02 13:01:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:01:53,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:53,502 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 13:01:53,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:01:53,503 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2115201689, now seen corresponding path program 1 times [2021-05-02 13:01:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:53,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180781458] [2021-05-02 13:01:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:53,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:53,731 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 13:01:53,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180781458] [2021-05-02 13:01:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180781458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:53,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:53,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:01:53,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698636435] [2021-05-02 13:01:53,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:01:53,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:53,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:01:53,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:01:53,734 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:53,939 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-05-02 13:01:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:01:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:01:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:53,943 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:01:53,943 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:01:53,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:01:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:01:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:01:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-05-02 13:01:53,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2021-05-02 13:01:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:53,963 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-05-02 13:01:53,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-05-02 13:01:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:01:53,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:53,966 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 13:01:53,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:01:53,967 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1181238037, now seen corresponding path program 1 times [2021-05-02 13:01:53,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:53,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000910962] [2021-05-02 13:01:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:54,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000910962] [2021-05-02 13:01:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000910962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:54,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:54,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:01:54,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299933264] [2021-05-02 13:01:54,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:01:54,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:01:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:01:54,067 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:54,145 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2021-05-02 13:01:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:01:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 13:01:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:54,147 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:01:54,147 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:01:54,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:01:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:01:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 13:01:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2021-05-02 13:01:54,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 18 [2021-05-02 13:01:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:54,154 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-05-02 13:01:54,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2021-05-02 13:01:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:01:54,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:54,155 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 13:01:54,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:01:54,156 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1710900860, now seen corresponding path program 1 times [2021-05-02 13:01:54,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:54,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257566962] [2021-05-02 13:01:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:54,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257566962] [2021-05-02 13:01:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257566962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:54,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:54,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:01:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688205282] [2021-05-02 13:01:54,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:01:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:01:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:01:54,209 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:54,290 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2021-05-02 13:01:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:01:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 13:01:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:54,291 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:01:54,291 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:01:54,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:01:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:01:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 13:01:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-05-02 13:01:54,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-05-02 13:01:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:54,298 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-05-02 13:01:54,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-05-02 13:01:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 13:01:54,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:54,299 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:54,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 13:01:54,299 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash 375506293, now seen corresponding path program 1 times [2021-05-02 13:01:54,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:54,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670778902] [2021-05-02 13:01:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:54,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670778902] [2021-05-02 13:01:54,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670778902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:54,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:54,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:01:54,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235659500] [2021-05-02 13:01:54,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:01:54,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:01:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:01:54,375 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:54,492 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 13:01:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:01:54,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 13:01:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:54,496 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:01:54,497 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:01:54,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:01:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:01:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 13:01:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2021-05-02 13:01:54,506 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 20 [2021-05-02 13:01:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:54,506 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2021-05-02 13:01:54,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2021-05-02 13:01:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 13:01:54,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:54,507 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:54,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 13:01:54,508 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1300031754, now seen corresponding path program 1 times [2021-05-02 13:01:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019763242] [2021-05-02 13:01:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:54,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019763242] [2021-05-02 13:01:54,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019763242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:54,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831570302] [2021-05-02 13:01:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:01:54,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831570302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:54,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:54,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 13:01:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671568701] [2021-05-02 13:01:54,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:01:54,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:01:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:01:54,806 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:55,033 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2021-05-02 13:01:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:01:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 13:01:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:55,038 INFO L225 Difference]: With dead ends: 71 [2021-05-02 13:01:55,038 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:01:55,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:01:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:01:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-05-02 13:01:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-05-02 13:01:55,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2021-05-02 13:01:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:55,056 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-05-02 13:01:55,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-05-02 13:01:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:01:55,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:55,061 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:55,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:01:55,262 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1232820840, now seen corresponding path program 1 times [2021-05-02 13:01:55,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:55,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574673923] [2021-05-02 13:01:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:55,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:55,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574673923] [2021-05-02 13:01:55,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574673923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894187474] [2021-05-02 13:01:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:01:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:55,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:55,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894187474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:55,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:55,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-02 13:01:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457403577] [2021-05-02 13:01:55,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:01:55,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:55,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:01:55,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:01:55,576 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:55,729 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2021-05-02 13:01:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:01:55,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 13:01:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:55,733 INFO L225 Difference]: With dead ends: 72 [2021-05-02 13:01:55,733 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 13:01:55,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:01:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 13:01:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2021-05-02 13:01:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2021-05-02 13:01:55,753 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 21 [2021-05-02 13:01:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:55,753 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2021-05-02 13:01:55,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2021-05-02 13:01:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:01:55,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:55,756 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] [2021-05-02 13:01:55,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:55,969 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1645264519, now seen corresponding path program 2 times [2021-05-02 13:01:55,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:55,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267470503] [2021-05-02 13:01:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:56,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:56,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267470503] [2021-05-02 13:01:56,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267470503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445599702] [2021-05-02 13:01:56,087 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:01:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:01:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:01:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:56,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:56,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445599702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:56,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:56,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-05-02 13:01:56,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646886355] [2021-05-02 13:01:56,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:01:56,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:56,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:01:56,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:01:56,252 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:56,475 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2021-05-02 13:01:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:01:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 13:01:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:56,477 INFO L225 Difference]: With dead ends: 102 [2021-05-02 13:01:56,477 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:01:56,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:01:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:01:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-05-02 13:01:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 56 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 13:01:56,483 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 21 [2021-05-02 13:01:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 13:01:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 13:01:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:01:56,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:56,485 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:56,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:56,705 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -29884763, now seen corresponding path program 1 times [2021-05-02 13:01:56,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:56,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210391512] [2021-05-02 13:01:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:56,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:56,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:56,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210391512] [2021-05-02 13:01:56,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210391512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:56,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440063327] [2021-05-02 13:01:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:01:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:56,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:56,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440063327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:56,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:56,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-05-02 13:01:56,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315936322] [2021-05-02 13:01:56,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:01:56,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:01:56,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:01:56,953 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:57,284 INFO L93 Difference]: Finished difference Result 103 states and 148 transitions. [2021-05-02 13:01:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:01:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 13:01:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:57,285 INFO L225 Difference]: With dead ends: 103 [2021-05-02 13:01:57,285 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 13:01:57,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:01:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 13:01:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-05-02 13:01:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 99 transitions. [2021-05-02 13:01:57,292 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 99 transitions. Word has length 22 [2021-05-02 13:01:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:57,293 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 99 transitions. [2021-05-02 13:01:57,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 99 transitions. [2021-05-02 13:01:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:01:57,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:57,294 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:57,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:57,517 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 537421654, now seen corresponding path program 3 times [2021-05-02 13:01:57,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:57,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855575530] [2021-05-02 13:01:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:57,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:57,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855575530] [2021-05-02 13:01:57,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855575530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546982381] [2021-05-02 13:01:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:57,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:01:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:01:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:01:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:01:57,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546982381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:57,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:57,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-05-02 13:01:57,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269843097] [2021-05-02 13:01:57,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:01:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:01:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:01:57,746 INFO L87 Difference]: Start difference. First operand 72 states and 99 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:58,595 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2021-05-02 13:01:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:01:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 13:01:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:58,597 INFO L225 Difference]: With dead ends: 141 [2021-05-02 13:01:58,597 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 13:01:58,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:01:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 13:01:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-05-02 13:01:58,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 79 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2021-05-02 13:01:58,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 22 [2021-05-02 13:01:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:58,605 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2021-05-02 13:01:58,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2021-05-02 13:01:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:01:58,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:58,606 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:58,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:01:58,820 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash -353925126, now seen corresponding path program 1 times [2021-05-02 13:01:58,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:58,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046027829] [2021-05-02 13:01:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:58,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:58,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:58,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046027829] [2021-05-02 13:01:58,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046027829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:58,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149608934] [2021-05-02 13:01:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:01:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:01:59,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149608934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:59,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:59,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-02 13:01:59,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790548107] [2021-05-02 13:01:59,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:01:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:01:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:01:59,046 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:59,273 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2021-05-02 13:01:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:01:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 13:01:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:59,275 INFO L225 Difference]: With dead ends: 126 [2021-05-02 13:01:59,275 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 13:01:59,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:01:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 13:01:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-05-02 13:01:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2021-05-02 13:01:59,282 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 23 [2021-05-02 13:01:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:59,282 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2021-05-02 13:01:59,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2021-05-02 13:01:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:01:59,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:59,283 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:59,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:59,503 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash 489571588, now seen corresponding path program 2 times [2021-05-02 13:01:59,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:59,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258871565] [2021-05-02 13:01:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:59,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:59,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258871565] [2021-05-02 13:01:59,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258871565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:59,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25025671] [2021-05-02 13:01:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:01:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:01:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:01:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:01:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25025671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:59,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:59,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-05-02 13:01:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489498560] [2021-05-02 13:01:59,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:01:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:01:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:01:59,751 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:00,976 INFO L93 Difference]: Finished difference Result 184 states and 268 transitions. [2021-05-02 13:02:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 13:02:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 13:02:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:00,977 INFO L225 Difference]: With dead ends: 184 [2021-05-02 13:02:00,977 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 13:02:00,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 13:02:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 13:02:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 97. [2021-05-02 13:02:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2021-05-02 13:02:00,986 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 24 [2021-05-02 13:02:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:00,986 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2021-05-02 13:02:00,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2021-05-02 13:02:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:02:00,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:00,987 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:01,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,201 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:01,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1760069884, now seen corresponding path program 4 times [2021-05-02 13:02:01,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:01,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038044564] [2021-05-02 13:02:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:01,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:01,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038044564] [2021-05-02 13:02:01,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038044564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:01,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885772822] [2021-05-02 13:02:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:02:01,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:01,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885772822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:01,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:01,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:02:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504388982] [2021-05-02 13:02:01,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:02:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:02:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:02:01,449 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:01,854 INFO L93 Difference]: Finished difference Result 193 states and 290 transitions. [2021-05-02 13:02:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:02:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 13:02:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:01,855 INFO L225 Difference]: With dead ends: 193 [2021-05-02 13:02:01,856 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 13:02:01,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:02:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 13:02:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-05-02 13:02:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 119 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2021-05-02 13:02:01,869 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 24 [2021-05-02 13:02:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:01,870 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2021-05-02 13:02:01,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2021-05-02 13:02:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:02:01,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:01,871 INFO L523 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:02,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:02:02,094 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1133815815, now seen corresponding path program 5 times [2021-05-02 13:02:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:02,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874888636] [2021-05-02 13:02:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:02,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:02,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:02,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874888636] [2021-05-02 13:02:02,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874888636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:02,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313132791] [2021-05-02 13:02:02,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:02,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 13:02:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:02:02,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:02,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313132791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:02,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:02,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 13:02:02,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86682911] [2021-05-02 13:02:02,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:02:02,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:02,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:02:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:02:02,396 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:02,944 INFO L93 Difference]: Finished difference Result 230 states and 343 transitions. [2021-05-02 13:02:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:02:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 13:02:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:02,946 INFO L225 Difference]: With dead ends: 230 [2021-05-02 13:02:02,946 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 13:02:02,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:02:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 13:02:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 140. [2021-05-02 13:02:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.3777777777777778) internal successors, (186), 135 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 190 transitions. [2021-05-02 13:02:02,955 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 190 transitions. Word has length 25 [2021-05-02 13:02:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:02,955 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 190 transitions. [2021-05-02 13:02:02,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 190 transitions. [2021-05-02 13:02:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:02:02,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:02,956 INFO L523 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:03,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:02:03,179 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash 649959268, now seen corresponding path program 6 times [2021-05-02 13:02:03,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:03,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515421908] [2021-05-02 13:02:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:03,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:03,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515421908] [2021-05-02 13:02:03,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515421908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:03,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026506685] [2021-05-02 13:02:03,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:03,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:02:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:02:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:02:03,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026506685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:03,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:03,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 13 [2021-05-02 13:02:03,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443282161] [2021-05-02 13:02:03,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:02:03,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:02:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:02:03,459 INFO L87 Difference]: Start difference. First operand 140 states and 190 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:04,585 INFO L93 Difference]: Finished difference Result 277 states and 414 transitions. [2021-05-02 13:02:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:02:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 13:02:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:04,587 INFO L225 Difference]: With dead ends: 277 [2021-05-02 13:02:04,587 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 13:02:04,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:02:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 13:02:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 166. [2021-05-02 13:02:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.3850931677018634) internal successors, (223), 161 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 227 transitions. [2021-05-02 13:02:04,599 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 227 transitions. Word has length 26 [2021-05-02 13:02:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:04,600 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 227 transitions. [2021-05-02 13:02:04,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 227 transitions. [2021-05-02 13:02:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:02:04,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:04,600 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 13:02:04,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:02:04,813 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1990704551, now seen corresponding path program 2 times [2021-05-02 13:02:04,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:04,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346233156] [2021-05-02 13:02:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 13:02:04,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:04,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346233156] [2021-05-02 13:02:04,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346233156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:04,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365741595] [2021-05-02 13:02:04,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:04,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:02:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 13:02:05,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365741595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:05,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:05,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-02 13:02:05,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696249784] [2021-05-02 13:02:05,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:02:05,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:02:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:02:05,024 INFO L87 Difference]: Start difference. First operand 166 states and 227 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:05,277 INFO L93 Difference]: Finished difference Result 242 states and 335 transitions. [2021-05-02 13:02:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:02:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:02:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:05,279 INFO L225 Difference]: With dead ends: 242 [2021-05-02 13:02:05,279 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 13:02:05,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:02:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 13:02:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 167. [2021-05-02 13:02:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.376543209876543) internal successors, (223), 162 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2021-05-02 13:02:05,288 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 27 [2021-05-02 13:02:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:05,289 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2021-05-02 13:02:05,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2021-05-02 13:02:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:02:05,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:05,289 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:05,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:02:05,505 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash -812701032, now seen corresponding path program 3 times [2021-05-02 13:02:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:05,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864813168] [2021-05-02 13:02:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864813168] [2021-05-02 13:02:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864813168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839819976] [2021-05-02 13:02:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:05,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:02:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:02:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:05,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839819976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:05,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:05,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-05-02 13:02:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482430718] [2021-05-02 13:02:05,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:02:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:02:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:02:05,910 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:06,960 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2021-05-02 13:02:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:02:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:02:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:06,962 INFO L225 Difference]: With dead ends: 266 [2021-05-02 13:02:06,962 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 13:02:06,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:02:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 13:02:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 191. [2021-05-02 13:02:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3655913978494623) internal successors, (254), 186 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 258 transitions. [2021-05-02 13:02:06,973 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 258 transitions. Word has length 27 [2021-05-02 13:02:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:06,973 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 258 transitions. [2021-05-02 13:02:06,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 258 transitions. [2021-05-02 13:02:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:02:06,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:06,974 INFO L523 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:07,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:02:07,185 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -337286777, now seen corresponding path program 7 times [2021-05-02 13:02:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903762720] [2021-05-02 13:02:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:07,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:07,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903762720] [2021-05-02 13:02:07,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903762720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:07,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23793435] [2021-05-02 13:02:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:02:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:07,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:07,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23793435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:07,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:07,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 13:02:07,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266246247] [2021-05-02 13:02:07,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:02:07,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:07,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:02:07,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:02:07,462 INFO L87 Difference]: Start difference. First operand 191 states and 258 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:08,207 INFO L93 Difference]: Finished difference Result 332 states and 489 transitions. [2021-05-02 13:02:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:02:08,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:02:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:08,209 INFO L225 Difference]: With dead ends: 332 [2021-05-02 13:02:08,209 INFO L226 Difference]: Without dead ends: 287 [2021-05-02 13:02:08,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:02:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-05-02 13:02:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 209. [2021-05-02 13:02:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.3725490196078431) internal successors, (280), 204 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 284 transitions. [2021-05-02 13:02:08,220 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 284 transitions. Word has length 27 [2021-05-02 13:02:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:08,220 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 284 transitions. [2021-05-02 13:02:08,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 284 transitions. [2021-05-02 13:02:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:02:08,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:08,221 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:08,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:08,437 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -184866059, now seen corresponding path program 2 times [2021-05-02 13:02:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:08,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926244187] [2021-05-02 13:02:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:08,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:08,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926244187] [2021-05-02 13:02:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926244187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023723072] [2021-05-02 13:02:08,546 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:08,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:02:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:08,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023723072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:08,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:08,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 13:02:08,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901610478] [2021-05-02 13:02:08,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:02:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:02:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:02:08,682 INFO L87 Difference]: Start difference. First operand 209 states and 284 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:09,103 INFO L93 Difference]: Finished difference Result 259 states and 346 transitions. [2021-05-02 13:02:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:02:09,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 13:02:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:09,105 INFO L225 Difference]: With dead ends: 259 [2021-05-02 13:02:09,105 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 13:02:09,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:02:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 13:02:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 209. [2021-05-02 13:02:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.3676470588235294) internal successors, (279), 204 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 283 transitions. [2021-05-02 13:02:09,115 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 283 transitions. Word has length 28 [2021-05-02 13:02:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:09,115 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 283 transitions. [2021-05-02 13:02:09,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 283 transitions. [2021-05-02 13:02:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:02:09,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:09,117 INFO L523 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:09,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:09,333 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1466960476, now seen corresponding path program 8 times [2021-05-02 13:02:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802993292] [2021-05-02 13:02:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:09,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:09,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802993292] [2021-05-02 13:02:09,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802993292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980062575] [2021-05-02 13:02:09,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:09,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:09,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:09,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:02:09,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:09,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:09,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980062575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:09,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:09,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:02:09,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531289973] [2021-05-02 13:02:09,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:02:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:02:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:02:09,600 INFO L87 Difference]: Start difference. First operand 209 states and 283 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:10,429 INFO L93 Difference]: Finished difference Result 360 states and 533 transitions. [2021-05-02 13:02:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:02:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 13:02:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:10,430 INFO L225 Difference]: With dead ends: 360 [2021-05-02 13:02:10,431 INFO L226 Difference]: Without dead ends: 315 [2021-05-02 13:02:10,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:02:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-02 13:02:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 227. [2021-05-02 13:02:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3738738738738738) internal successors, (305), 222 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 309 transitions. [2021-05-02 13:02:10,442 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 309 transitions. Word has length 28 [2021-05-02 13:02:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:10,443 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 309 transitions. [2021-05-02 13:02:10,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 309 transitions. [2021-05-02 13:02:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:02:10,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:10,444 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:10,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:02:10,657 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash 939274105, now seen corresponding path program 3 times [2021-05-02 13:02:10,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:10,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648033065] [2021-05-02 13:02:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:10,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:02:10,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648033065] [2021-05-02 13:02:10,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648033065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:10,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589048920] [2021-05-02 13:02:10,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:02:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:02:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589048920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:10,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:10,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-02 13:02:10,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675167717] [2021-05-02 13:02:10,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:02:10,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:02:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:02:10,958 INFO L87 Difference]: Start difference. First operand 227 states and 309 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:11,261 INFO L93 Difference]: Finished difference Result 356 states and 489 transitions. [2021-05-02 13:02:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:02:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:02:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:11,262 INFO L225 Difference]: With dead ends: 356 [2021-05-02 13:02:11,263 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 13:02:11,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:02:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 13:02:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 214. [2021-05-02 13:02:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.3732057416267942) internal successors, (287), 209 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 291 transitions. [2021-05-02 13:02:11,274 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 291 transitions. Word has length 29 [2021-05-02 13:02:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:11,274 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 291 transitions. [2021-05-02 13:02:11,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 291 transitions. [2021-05-02 13:02:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:02:11,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:11,275 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:11,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:11,497 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash -571931592, now seen corresponding path program 4 times [2021-05-02 13:02:11,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:11,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785809228] [2021-05-02 13:02:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:11,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:11,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785809228] [2021-05-02 13:02:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785809228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72075717] [2021-05-02 13:02:11,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:11,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:02:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:11,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:11,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72075717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:11,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:11,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2021-05-02 13:02:11,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124816729] [2021-05-02 13:02:11,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:02:11,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:02:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:02:11,744 INFO L87 Difference]: Start difference. First operand 214 states and 291 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:12,163 INFO L93 Difference]: Finished difference Result 374 states and 526 transitions. [2021-05-02 13:02:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:02:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:02:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:12,165 INFO L225 Difference]: With dead ends: 374 [2021-05-02 13:02:12,165 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 13:02:12,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:02:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 13:02:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 233. [2021-05-02 13:02:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.368421052631579) internal successors, (312), 228 states have internal predecessors, (312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 316 transitions. [2021-05-02 13:02:12,177 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 316 transitions. Word has length 29 [2021-05-02 13:02:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:12,178 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 316 transitions. [2021-05-02 13:02:12,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 316 transitions. [2021-05-02 13:02:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:02:12,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:12,178 INFO L523 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:12,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:02:12,401 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2127106777, now seen corresponding path program 9 times [2021-05-02 13:02:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:12,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702373471] [2021-05-02 13:02:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:12,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:12,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:12,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702373471] [2021-05-02 13:02:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702373471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:12,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985488607] [2021-05-02 13:02:12,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:12,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:02:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:02:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-02 13:02:12,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985488607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:02:12,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:02:12,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2021-05-02 13:02:12,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334122112] [2021-05-02 13:02:12,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:02:12,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:02:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:02:12,721 INFO L87 Difference]: Start difference. First operand 233 states and 316 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:12,762 INFO L93 Difference]: Finished difference Result 246 states and 329 transitions. [2021-05-02 13:02:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:02:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:02:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:12,763 INFO L225 Difference]: With dead ends: 246 [2021-05-02 13:02:12,763 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 13:02:12,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:02:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 13:02:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2021-05-02 13:02:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.3660714285714286) internal successors, (306), 224 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 310 transitions. [2021-05-02 13:02:12,776 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 310 transitions. Word has length 29 [2021-05-02 13:02:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:12,776 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 310 transitions. [2021-05-02 13:02:12,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 310 transitions. [2021-05-02 13:02:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:02:12,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:12,777 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:12,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 13:02:12,993 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1279684216, now seen corresponding path program 1 times [2021-05-02 13:02:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155943080] [2021-05-02 13:02:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:13,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:02:13,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:13,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155943080] [2021-05-02 13:02:13,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155943080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:13,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891618565] [2021-05-02 13:02:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:02:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:13,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:02:13,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891618565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:13,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:13,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:02:13,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989303440] [2021-05-02 13:02:13,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:02:13,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:02:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:02:13,305 INFO L87 Difference]: Start difference. First operand 229 states and 310 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:14,379 INFO L93 Difference]: Finished difference Result 416 states and 627 transitions. [2021-05-02 13:02:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:02:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:02:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:14,381 INFO L225 Difference]: With dead ends: 416 [2021-05-02 13:02:14,381 INFO L226 Difference]: Without dead ends: 363 [2021-05-02 13:02:14,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:02:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-02 13:02:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 247. [2021-05-02 13:02:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.3677685950413223) internal successors, (331), 242 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 335 transitions. [2021-05-02 13:02:14,397 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 335 transitions. Word has length 29 [2021-05-02 13:02:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:14,398 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 335 transitions. [2021-05-02 13:02:14,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 335 transitions. [2021-05-02 13:02:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:02:14,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:14,399 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:14,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 13:02:14,613 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1141944188, now seen corresponding path program 5 times [2021-05-02 13:02:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629619564] [2021-05-02 13:02:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:14,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629619564] [2021-05-02 13:02:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629619564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137236378] [2021-05-02 13:02:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:14,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 13:02:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:02:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 13:02:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137236378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:14,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:14,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-05-02 13:02:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059804001] [2021-05-02 13:02:14,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:02:14,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:02:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:02:14,974 INFO L87 Difference]: Start difference. First operand 247 states and 335 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:20,301 INFO L93 Difference]: Finished difference Result 712 states and 979 transitions. [2021-05-02 13:02:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 13:02:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 13:02:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:20,304 INFO L225 Difference]: With dead ends: 712 [2021-05-02 13:02:20,304 INFO L226 Difference]: Without dead ends: 638 [2021-05-02 13:02:20,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 4427.4ms TimeCoverageRelationStatistics Valid=1211, Invalid=10999, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 13:02:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-02 13:02:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 301. [2021-05-02 13:02:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.3547297297297298) internal successors, (401), 296 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 405 transitions. [2021-05-02 13:02:20,322 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 405 transitions. Word has length 30 [2021-05-02 13:02:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:20,322 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 405 transitions. [2021-05-02 13:02:20,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 405 transitions. [2021-05-02 13:02:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:02:20,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:20,323 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:20,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 13:02:20,545 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1393943515, now seen corresponding path program 3 times [2021-05-02 13:02:20,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:20,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179757924] [2021-05-02 13:02:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:20,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 13:02:20,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:20,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179757924] [2021-05-02 13:02:20,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179757924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:20,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647880518] [2021-05-02 13:02:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:02:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:02:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 13:02:20,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647880518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:20,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:20,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-05-02 13:02:20,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197303541] [2021-05-02 13:02:20,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:02:20,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:20,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:02:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:02:20,828 INFO L87 Difference]: Start difference. First operand 301 states and 405 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:21,856 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2021-05-02 13:02:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:02:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 13:02:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:21,859 INFO L225 Difference]: With dead ends: 408 [2021-05-02 13:02:21,859 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 13:02:21,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:02:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 13:02:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 291. [2021-05-02 13:02:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.3461538461538463) internal successors, (385), 286 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 389 transitions. [2021-05-02 13:02:21,874 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 389 transitions. Word has length 30 [2021-05-02 13:02:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:21,874 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 389 transitions. [2021-05-02 13:02:21,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 389 transitions. [2021-05-02 13:02:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:02:21,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:21,875 INFO L523 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:22,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 13:02:22,097 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -495855115, now seen corresponding path program 2 times [2021-05-02 13:02:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:22,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504591209] [2021-05-02 13:02:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:22,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:22,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504591209] [2021-05-02 13:02:22,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504591209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83665743] [2021-05-02 13:02:22,305 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:22,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:02:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:02:22,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83665743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:22,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:22,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 18 [2021-05-02 13:02:22,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750056807] [2021-05-02 13:02:22,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:02:22,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:02:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:02:22,443 INFO L87 Difference]: Start difference. First operand 291 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:23,667 INFO L93 Difference]: Finished difference Result 499 states and 739 transitions. [2021-05-02 13:02:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:02:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 13:02:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:23,677 INFO L225 Difference]: With dead ends: 499 [2021-05-02 13:02:23,678 INFO L226 Difference]: Without dead ends: 437 [2021-05-02 13:02:23,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:02:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-02 13:02:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 312. [2021-05-02 13:02:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.3485342019543973) internal successors, (414), 307 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 418 transitions. [2021-05-02 13:02:23,693 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 418 transitions. Word has length 32 [2021-05-02 13:02:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:23,693 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 418 transitions. [2021-05-02 13:02:23,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 418 transitions. [2021-05-02 13:02:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:02:23,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:23,695 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:23,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:23,909 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1198120537, now seen corresponding path program 4 times [2021-05-02 13:02:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:23,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892901061] [2021-05-02 13:02:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:24,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:02:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892901061] [2021-05-02 13:02:24,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892901061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:24,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984820658] [2021-05-02 13:02:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:24,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:02:24,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:24,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:02:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984820658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:24,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:24,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 13:02:24,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224709035] [2021-05-02 13:02:24,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:02:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:02:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:02:24,160 INFO L87 Difference]: Start difference. First operand 312 states and 418 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:24,754 INFO L93 Difference]: Finished difference Result 381 states and 504 transitions. [2021-05-02 13:02:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:02:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:02:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:24,755 INFO L225 Difference]: With dead ends: 381 [2021-05-02 13:02:24,755 INFO L226 Difference]: Without dead ends: 360 [2021-05-02 13:02:24,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:02:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-02 13:02:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 312. [2021-05-02 13:02:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.3452768729641693) internal successors, (413), 307 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 417 transitions. [2021-05-02 13:02:24,770 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 417 transitions. Word has length 33 [2021-05-02 13:02:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:24,770 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 417 transitions. [2021-05-02 13:02:24,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 417 transitions. [2021-05-02 13:02:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:02:24,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:24,771 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:24,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:24,985 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1710955641, now seen corresponding path program 5 times [2021-05-02 13:02:24,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:24,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253910144] [2021-05-02 13:02:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 13:02:25,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253910144] [2021-05-02 13:02:25,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253910144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:25,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101053628] [2021-05-02 13:02:25,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:25,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 13:02:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:02:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 13:02:25,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101053628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:25,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:25,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-05-02 13:02:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397955863] [2021-05-02 13:02:25,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:02:25,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:02:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:02:25,494 INFO L87 Difference]: Start difference. First operand 312 states and 417 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:31,275 INFO L93 Difference]: Finished difference Result 780 states and 1022 transitions. [2021-05-02 13:02:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 13:02:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:02:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:31,277 INFO L225 Difference]: With dead ends: 780 [2021-05-02 13:02:31,277 INFO L226 Difference]: Without dead ends: 709 [2021-05-02 13:02:31,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5485 ImplicationChecksByTransitivity, 4559.7ms TimeCoverageRelationStatistics Valid=1353, Invalid=13899, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:02:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-05-02 13:02:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 308. [2021-05-02 13:02:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.33993399339934) internal successors, (406), 303 states have internal predecessors, (406), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 410 transitions. [2021-05-02 13:02:31,299 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 410 transitions. Word has length 33 [2021-05-02 13:02:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:31,299 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 410 transitions. [2021-05-02 13:02:31,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 410 transitions. [2021-05-02 13:02:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:02:31,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:31,300 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:31,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:31,504 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2118455400, now seen corresponding path program 6 times [2021-05-02 13:02:31,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:31,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683800650] [2021-05-02 13:02:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:31,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:31,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:31,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683800650] [2021-05-02 13:02:31,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683800650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:31,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477301887] [2021-05-02 13:02:31,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:31,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 13:02:31,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:31,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:02:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:02:31,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477301887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:31,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:31,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-05-02 13:02:31,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090971088] [2021-05-02 13:02:31,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:02:31,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:31,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:02:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:02:31,999 INFO L87 Difference]: Start difference. First operand 308 states and 410 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:32,375 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:02:38,427 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:02:40,232 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:02:41,270 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:02:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:45,846 INFO L93 Difference]: Finished difference Result 990 states and 1322 transitions. [2021-05-02 13:02:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-05-02 13:02:45,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:02:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:45,849 INFO L225 Difference]: With dead ends: 990 [2021-05-02 13:02:45,849 INFO L226 Difference]: Without dead ends: 928 [2021-05-02 13:02:45,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15119 ImplicationChecksByTransitivity, 11798.6ms TimeCoverageRelationStatistics Valid=2948, Invalid=34882, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 13:02:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-05-02 13:02:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 363. [2021-05-02 13:02:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.3407821229050279) internal successors, (480), 358 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 484 transitions. [2021-05-02 13:02:45,872 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 484 transitions. Word has length 33 [2021-05-02 13:02:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:45,872 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 484 transitions. [2021-05-02 13:02:45,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 484 transitions. [2021-05-02 13:02:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:02:45,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:45,873 INFO L523 BasicCegarLoop]: trace histogram [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:46,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 13:02:46,095 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1745135624, now seen corresponding path program 3 times [2021-05-02 13:02:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:46,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369354403] [2021-05-02 13:02:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:46,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:02:46,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:46,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369354403] [2021-05-02 13:02:46,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369354403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:46,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730079012] [2021-05-02 13:02:46,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:46,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:02:46,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:02:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-02 13:02:46,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730079012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:46,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:46,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4] total 20 [2021-05-02 13:02:46,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651153273] [2021-05-02 13:02:46,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:02:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:02:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:02:46,512 INFO L87 Difference]: Start difference. First operand 363 states and 484 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:48,384 INFO L93 Difference]: Finished difference Result 611 states and 910 transitions. [2021-05-02 13:02:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:02:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:02:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:48,387 INFO L225 Difference]: With dead ends: 611 [2021-05-02 13:02:48,387 INFO L226 Difference]: Without dead ends: 548 [2021-05-02 13:02:48,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1157.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 13:02:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-05-02 13:02:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 394. [2021-05-02 13:02:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.3419023136246786) internal successors, (522), 389 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 526 transitions. [2021-05-02 13:02:48,406 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 526 transitions. Word has length 33 [2021-05-02 13:02:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:48,407 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 526 transitions. [2021-05-02 13:02:48,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 526 transitions. [2021-05-02 13:02:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:02:48,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:48,408 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:48,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:48,630 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash 289270042, now seen corresponding path program 4 times [2021-05-02 13:02:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:48,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918859938] [2021-05-02 13:02:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:02:48,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918859938] [2021-05-02 13:02:48,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918859938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076124766] [2021-05-02 13:02:48,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:48,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:48,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:02:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:48,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:48,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:48,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:48,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:02:48,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076124766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:48,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:48,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-02 13:02:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320812410] [2021-05-02 13:02:48,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:02:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:02:48,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:02:48,921 INFO L87 Difference]: Start difference. First operand 394 states and 526 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:49,288 INFO L93 Difference]: Finished difference Result 649 states and 861 transitions. [2021-05-02 13:02:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:02:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 13:02:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:49,290 INFO L225 Difference]: With dead ends: 649 [2021-05-02 13:02:49,290 INFO L226 Difference]: Without dead ends: 523 [2021-05-02 13:02:49,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:02:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-05-02 13:02:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 380. [2021-05-02 13:02:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.3386666666666667) internal successors, (502), 375 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 506 transitions. [2021-05-02 13:02:49,306 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 506 transitions. Word has length 35 [2021-05-02 13:02:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:49,307 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 506 transitions. [2021-05-02 13:02:49,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 506 transitions. [2021-05-02 13:02:49,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:02:49,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:49,308 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:49,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 13:02:49,517 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1852705767, now seen corresponding path program 6 times [2021-05-02 13:02:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:49,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256547114] [2021-05-02 13:02:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 13:02:49,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:49,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256547114] [2021-05-02 13:02:49,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256547114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:49,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223130396] [2021-05-02 13:02:49,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:49,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 13:02:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:02:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 13:02:49,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223130396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:49,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:49,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:02:49,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369390803] [2021-05-02 13:02:49,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:02:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:02:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:02:49,898 INFO L87 Difference]: Start difference. First operand 380 states and 506 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:50,533 INFO L93 Difference]: Finished difference Result 469 states and 617 transitions. [2021-05-02 13:02:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:02:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 13:02:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:50,535 INFO L225 Difference]: With dead ends: 469 [2021-05-02 13:02:50,535 INFO L226 Difference]: Without dead ends: 447 [2021-05-02 13:02:50,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:02:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-02 13:02:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 380. [2021-05-02 13:02:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.336) internal successors, (501), 375 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 505 transitions. [2021-05-02 13:02:50,553 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 505 transitions. Word has length 35 [2021-05-02 13:02:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:50,553 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 505 transitions. [2021-05-02 13:02:50,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 505 transitions. [2021-05-02 13:02:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:02:50,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:50,554 INFO L523 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:50,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 13:02:50,776 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:50,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1204902311, now seen corresponding path program 1 times [2021-05-02 13:02:50,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:50,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212734311] [2021-05-02 13:02:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:51,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:02:51,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212734311] [2021-05-02 13:02:51,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212734311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968957540] [2021-05-02 13:02:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:02:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:02:51,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968957540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:51,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:51,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 13:02:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512924759] [2021-05-02 13:02:51,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:02:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:02:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:02:51,214 INFO L87 Difference]: Start difference. First operand 380 states and 505 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:52,770 INFO L93 Difference]: Finished difference Result 637 states and 958 transitions. [2021-05-02 13:02:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:02:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 13:02:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:52,772 INFO L225 Difference]: With dead ends: 637 [2021-05-02 13:02:52,772 INFO L226 Difference]: Without dead ends: 582 [2021-05-02 13:02:52,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 13:02:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-05-02 13:02:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 387. [2021-05-02 13:02:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.3324607329842932) internal successors, (509), 382 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 513 transitions. [2021-05-02 13:02:52,785 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 513 transitions. Word has length 35 [2021-05-02 13:02:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:52,786 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 513 transitions. [2021-05-02 13:02:52,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 513 transitions. [2021-05-02 13:02:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:02:52,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:52,787 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:53,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:02:53,001 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash 284864181, now seen corresponding path program 7 times [2021-05-02 13:02:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:53,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165416861] [2021-05-02 13:02:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:53,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 13:02:53,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:53,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165416861] [2021-05-02 13:02:53,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165416861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:53,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211764509] [2021-05-02 13:02:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:02:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:02:53,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211764509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:53,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:53,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-05-02 13:02:53,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564064750] [2021-05-02 13:02:53,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:02:53,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:02:53,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:02:53,452 INFO L87 Difference]: Start difference. First operand 387 states and 513 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:04,804 INFO L93 Difference]: Finished difference Result 1105 states and 1415 transitions. [2021-05-02 13:03:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-02 13:03:04,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 13:03:04,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:04,807 INFO L225 Difference]: With dead ends: 1105 [2021-05-02 13:03:04,807 INFO L226 Difference]: Without dead ends: 1009 [2021-05-02 13:03:04,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13024 ImplicationChecksByTransitivity, 9303.8ms TimeCoverageRelationStatistics Valid=2543, Invalid=30763, Unknown=0, NotChecked=0, Total=33306 [2021-05-02 13:03:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-05-02 13:03:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 363. [2021-05-02 13:03:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.3379888268156424) internal successors, (479), 358 states have internal predecessors, (479), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 483 transitions. [2021-05-02 13:03:04,828 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 483 transitions. Word has length 36 [2021-05-02 13:03:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:04,829 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 483 transitions. [2021-05-02 13:03:04,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 483 transitions. [2021-05-02 13:03:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:03:04,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:04,830 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:05,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:05,051 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -224601084, now seen corresponding path program 7 times [2021-05-02 13:03:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:05,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120939706] [2021-05-02 13:03:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:05,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:05,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:05,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120939706] [2021-05-02 13:03:05,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120939706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:05,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699522925] [2021-05-02 13:03:05,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:03:05,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:03:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699522925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:05,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:05,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-05-02 13:03:05,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525905001] [2021-05-02 13:03:05,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:03:05,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:03:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:03:05,662 INFO L87 Difference]: Start difference. First operand 363 states and 483 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:06,192 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:06,645 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:06,930 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:07,145 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:07,368 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:07,619 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:07,890 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:03:08,297 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:08,538 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:09,044 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:03:09,637 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:03:11,851 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:12,339 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:12,595 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:12,980 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:03:13,275 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:13,545 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:14,430 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:14,731 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:15,463 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:15,667 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:15,966 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:16,174 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:17,069 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:03:17,285 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:03:17,632 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:17,827 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:18,066 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:18,888 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:03:19,454 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:19,721 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:19,959 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:20,211 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:21,193 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:03:21,847 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:22,036 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:03:22,297 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:22,552 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:23,717 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:03:24,199 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:24,504 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:24,731 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:25,645 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:03:26,299 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:26,533 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:03:27,902 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:03:28,135 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:30,754 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:03:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:34,959 INFO L93 Difference]: Finished difference Result 1343 states and 1762 transitions. [2021-05-02 13:03:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-05-02 13:03:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 13:03:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:34,963 INFO L225 Difference]: With dead ends: 1343 [2021-05-02 13:03:34,963 INFO L226 Difference]: Without dead ends: 1268 [2021-05-02 13:03:34,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31219 ImplicationChecksByTransitivity, 25650.5ms TimeCoverageRelationStatistics Valid=4878, Invalid=69378, Unknown=0, NotChecked=0, Total=74256 [2021-05-02 13:03:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-05-02 13:03:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 428. [2021-05-02 13:03:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.3356973995271868) internal successors, (565), 423 states have internal predecessors, (565), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2021-05-02 13:03:34,989 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 36 [2021-05-02 13:03:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:34,989 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2021-05-02 13:03:34,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2021-05-02 13:03:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:03:34,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:34,990 INFO L523 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:35,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:03:35,205 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1666041206, now seen corresponding path program 2 times [2021-05-02 13:03:35,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:35,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092506123] [2021-05-02 13:03:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:35,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:03:35,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092506123] [2021-05-02 13:03:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092506123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387544244] [2021-05-02 13:03:35,545 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:35,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:03:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:03:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:35,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:03:35,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387544244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:35,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:35,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2021-05-02 13:03:35,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559239634] [2021-05-02 13:03:35,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:03:35,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:03:35,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:03:35,765 INFO L87 Difference]: Start difference. First operand 428 states and 569 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:37,787 INFO L93 Difference]: Finished difference Result 711 states and 1066 transitions. [2021-05-02 13:03:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:03:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 13:03:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:37,789 INFO L225 Difference]: With dead ends: 711 [2021-05-02 13:03:37,790 INFO L226 Difference]: Without dead ends: 656 [2021-05-02 13:03:37,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:03:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-05-02 13:03:37,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 455. [2021-05-02 13:03:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 450 states have (on average 1.34) internal successors, (603), 450 states have internal predecessors, (603), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 607 transitions. [2021-05-02 13:03:37,811 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 607 transitions. Word has length 36 [2021-05-02 13:03:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:37,811 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 607 transitions. [2021-05-02 13:03:37,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 607 transitions. [2021-05-02 13:03:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 13:03:37,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:37,812 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:38,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:03:38,033 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1034985127, now seen corresponding path program 5 times [2021-05-02 13:03:38,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:38,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978462741] [2021-05-02 13:03:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:38,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 13:03:38,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:38,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978462741] [2021-05-02 13:03:38,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978462741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:38,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184002917] [2021-05-02 13:03:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:38,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 13:03:38,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:03:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 13:03:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184002917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:38,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:38,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2021-05-02 13:03:38,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352999214] [2021-05-02 13:03:38,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:03:38,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:38,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:03:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:03:38,612 INFO L87 Difference]: Start difference. First operand 455 states and 607 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:39,946 INFO L93 Difference]: Finished difference Result 1026 states and 1318 transitions. [2021-05-02 13:03:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:03:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 13:03:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:39,949 INFO L225 Difference]: With dead ends: 1026 [2021-05-02 13:03:39,950 INFO L226 Difference]: Without dead ends: 984 [2021-05-02 13:03:39,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 13:03:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-05-02 13:03:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 476. [2021-05-02 13:03:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3248407643312101) internal successors, (624), 471 states have internal predecessors, (624), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 628 transitions. [2021-05-02 13:03:39,974 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 628 transitions. Word has length 37 [2021-05-02 13:03:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:39,974 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 628 transitions. [2021-05-02 13:03:39,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 628 transitions. [2021-05-02 13:03:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 13:03:39,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:39,975 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:40,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:40,193 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash 397617959, now seen corresponding path program 8 times [2021-05-02 13:03:40,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:40,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893433000] [2021-05-02 13:03:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 13:03:40,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:40,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893433000] [2021-05-02 13:03:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893433000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082595354] [2021-05-02 13:03:40,398 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:40,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:03:40,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:03:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 13:03:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082595354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:40,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:40,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 13:03:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739840168] [2021-05-02 13:03:40,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:03:40,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:03:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:03:40,592 INFO L87 Difference]: Start difference. First operand 476 states and 628 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:41,708 INFO L93 Difference]: Finished difference Result 587 states and 764 transitions. [2021-05-02 13:03:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:03:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 13:03:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:41,710 INFO L225 Difference]: With dead ends: 587 [2021-05-02 13:03:41,710 INFO L226 Difference]: Without dead ends: 564 [2021-05-02 13:03:41,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:03:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-05-02 13:03:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 476. [2021-05-02 13:03:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3227176220806793) internal successors, (623), 471 states have internal predecessors, (623), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 627 transitions. [2021-05-02 13:03:41,729 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 627 transitions. Word has length 37 [2021-05-02 13:03:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:41,730 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 627 transitions. [2021-05-02 13:03:41,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 627 transitions. [2021-05-02 13:03:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 13:03:41,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:41,731 INFO L523 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:41,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-02 13:03:41,953 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash 470977017, now seen corresponding path program 3 times [2021-05-02 13:03:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510817058] [2021-05-02 13:03:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:42,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 13:03:42,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510817058] [2021-05-02 13:03:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510817058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028450241] [2021-05-02 13:03:42,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:03:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:03:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:03:42,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028450241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:42,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:42,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6] total 25 [2021-05-02 13:03:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106968737] [2021-05-02 13:03:42,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:03:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:42,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:03:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:03:42,590 INFO L87 Difference]: Start difference. First operand 476 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:46,123 INFO L93 Difference]: Finished difference Result 843 states and 1268 transitions. [2021-05-02 13:03:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:03:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 13:03:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:46,126 INFO L225 Difference]: With dead ends: 843 [2021-05-02 13:03:46,126 INFO L226 Difference]: Without dead ends: 782 [2021-05-02 13:03:46,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2229.2ms TimeCoverageRelationStatistics Valid=577, Invalid=4393, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:03:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-05-02 13:03:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 528. [2021-05-02 13:03:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 523 states have (on average 1.3346080305927341) internal successors, (698), 523 states have internal predecessors, (698), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 702 transitions. [2021-05-02 13:03:46,150 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 702 transitions. Word has length 37 [2021-05-02 13:03:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:46,151 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 702 transitions. [2021-05-02 13:03:46,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 702 transitions. [2021-05-02 13:03:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:03:46,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:46,152 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:46,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:46,374 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1063665465, now seen corresponding path program 9 times [2021-05-02 13:03:46,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:46,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143892397] [2021-05-02 13:03:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:46,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 13:03:46,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143892397] [2021-05-02 13:03:46,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143892397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785563756] [2021-05-02 13:03:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:46,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:03:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:03:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-05-02 13:03:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785563756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2021-05-02 13:03:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593393216] [2021-05-02 13:03:47,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:03:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:03:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:03:47,251 INFO L87 Difference]: Start difference. First operand 528 states and 702 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:54,741 INFO L93 Difference]: Finished difference Result 1075 states and 1497 transitions. [2021-05-02 13:03:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 13:03:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 13:03:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:54,743 INFO L225 Difference]: With dead ends: 1075 [2021-05-02 13:03:54,743 INFO L226 Difference]: Without dead ends: 803 [2021-05-02 13:03:54,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 4299.9ms TimeCoverageRelationStatistics Valid=721, Invalid=13085, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:03:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-05-02 13:03:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 404. [2021-05-02 13:03:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.3107769423558897) internal successors, (523), 399 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 527 transitions. [2021-05-02 13:03:54,765 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 527 transitions. Word has length 39 [2021-05-02 13:03:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:54,766 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 527 transitions. [2021-05-02 13:03:54,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 527 transitions. [2021-05-02 13:03:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:03:54,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:54,767 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:54,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 13:03:54,970 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:54,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -439094120, now seen corresponding path program 8 times [2021-05-02 13:03:54,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:54,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976170892] [2021-05-02 13:03:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:55,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:55,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976170892] [2021-05-02 13:03:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976170892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:55,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166736593] [2021-05-02 13:03:55,378 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:55,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:03:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:55,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:03:55,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:03:55,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166736593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:55,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:55,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2021-05-02 13:03:55,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953066953] [2021-05-02 13:03:55,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:03:55,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:03:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:03:55,824 INFO L87 Difference]: Start difference. First operand 404 states and 527 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:56,846 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:03:57,846 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:03:58,222 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:03:58,525 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:03:59,182 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:03:59,543 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:03:59,923 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:04:00,446 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:04:00,815 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:01,322 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:01,871 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:02,309 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:02,510 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:02,797 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:03,431 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:04,104 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:04,517 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:04:04,898 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:04:05,446 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:04:06,104 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:04:06,560 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:04:07,211 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:04:07,508 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:04:10,379 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:04:10,980 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:04:12,662 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:04:13,151 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:14,353 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:04:15,166 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:04:15,610 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:16,035 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:16,906 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:17,432 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:18,635 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:19,199 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:19,671 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:20,805 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:21,290 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:21,801 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:22,088 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:04:22,588 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:22,939 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:23,369 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:23,847 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:24,197 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:04:25,128 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:25,448 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:26,001 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:26,449 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:04:27,419 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:04:27,768 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:04:28,506 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:04:29,023 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:04:29,910 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:04:30,219 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:04:31,285 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:04:31,836 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:04:33,072 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:04:33,932 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:04:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:37,781 INFO L93 Difference]: Finished difference Result 1495 states and 2013 transitions. [2021-05-02 13:04:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-05-02 13:04:37,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 13:04:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:37,785 INFO L225 Difference]: With dead ends: 1495 [2021-05-02 13:04:37,785 INFO L226 Difference]: Without dead ends: 1397 [2021-05-02 13:04:37,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23744 ImplicationChecksByTransitivity, 36490.8ms TimeCoverageRelationStatistics Valid=4262, Invalid=55030, Unknown=0, NotChecked=0, Total=59292 [2021-05-02 13:04:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-05-02 13:04:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 576. [2021-05-02 13:04:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.2609457092819614) internal successors, (720), 571 states have internal predecessors, (720), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 724 transitions. [2021-05-02 13:04:37,808 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 724 transitions. Word has length 39 [2021-05-02 13:04:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 724 transitions. [2021-05-02 13:04:37,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 724 transitions. [2021-05-02 13:04:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:04:37,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:37,809 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:38,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 13:04:38,025 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 932823321, now seen corresponding path program 10 times [2021-05-02 13:04:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852011145] [2021-05-02 13:04:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:38,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 13:04:38,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852011145] [2021-05-02 13:04:38,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852011145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298218482] [2021-05-02 13:04:38,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:38,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:04:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:04:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:38,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 13:04:38,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298218482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:38,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:38,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:04:38,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683728841] [2021-05-02 13:04:38,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:04:38,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:04:38,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:04:38,511 INFO L87 Difference]: Start difference. First operand 576 states and 724 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:39,971 INFO L93 Difference]: Finished difference Result 715 states and 889 transitions. [2021-05-02 13:04:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:04:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 13:04:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:39,973 INFO L225 Difference]: With dead ends: 715 [2021-05-02 13:04:39,973 INFO L226 Difference]: Without dead ends: 691 [2021-05-02 13:04:39,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 810.6ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:04:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-05-02 13:04:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 576. [2021-05-02 13:04:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 571 states have (on average 1.2591943957968477) internal successors, (719), 571 states have internal predecessors, (719), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 723 transitions. [2021-05-02 13:04:39,991 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 723 transitions. Word has length 39 [2021-05-02 13:04:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:39,992 INFO L480 AbstractCegarLoop]: Abstraction has 576 states and 723 transitions. [2021-05-02 13:04:39,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 723 transitions. [2021-05-02 13:04:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:04:39,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:39,993 INFO L523 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:40,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 13:04:40,197 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1691520280, now seen corresponding path program 11 times [2021-05-02 13:04:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:40,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271488854] [2021-05-02 13:04:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:40,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:04:40,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:40,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271488854] [2021-05-02 13:04:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271488854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:40,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734975786] [2021-05-02 13:04:40,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:40,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-02 13:04:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:40,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:04:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:41,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:04:41,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734975786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:41,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:41,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 13:04:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315773060] [2021-05-02 13:04:41,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:04:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:04:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:04:41,192 INFO L87 Difference]: Start difference. First operand 576 states and 723 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:44,562 INFO L93 Difference]: Finished difference Result 922 states and 1332 transitions. [2021-05-02 13:04:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:04:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 13:04:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:44,565 INFO L225 Difference]: With dead ends: 922 [2021-05-02 13:04:44,565 INFO L226 Difference]: Without dead ends: 876 [2021-05-02 13:04:44,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1434.7ms TimeCoverageRelationStatistics Valid=152, Invalid=1828, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 13:04:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-05-02 13:04:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 635. [2021-05-02 13:04:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 630 states have (on average 1.265079365079365) internal successors, (797), 630 states have internal predecessors, (797), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 801 transitions. [2021-05-02 13:04:44,586 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 801 transitions. Word has length 39 [2021-05-02 13:04:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:44,586 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 801 transitions. [2021-05-02 13:04:44,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 801 transitions. [2021-05-02 13:04:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 13:04:44,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:44,595 INFO L523 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:44,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 13:04:44,799 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 518182325, now seen corresponding path program 12 times [2021-05-02 13:04:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:44,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699360265] [2021-05-02 13:04:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:45,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:04:45,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:45,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699360265] [2021-05-02 13:04:45,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699360265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642953945] [2021-05-02 13:04:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:45,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:04:45,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:04:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-02 13:04:45,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642953945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:45,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:45,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-02 13:04:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898257660] [2021-05-02 13:04:45,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:04:45,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:04:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:04:45,761 INFO L87 Difference]: Start difference. First operand 635 states and 801 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:53,910 INFO L93 Difference]: Finished difference Result 1017 states and 1473 transitions. [2021-05-02 13:04:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:04:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 13:04:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:53,913 INFO L225 Difference]: With dead ends: 1017 [2021-05-02 13:04:53,913 INFO L226 Difference]: Without dead ends: 953 [2021-05-02 13:04:53,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 4440.8ms TimeCoverageRelationStatistics Valid=495, Invalid=8061, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 13:04:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-05-02 13:04:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 590. [2021-05-02 13:04:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 585 states have (on average 1.2598290598290598) internal successors, (737), 585 states have internal predecessors, (737), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 741 transitions. [2021-05-02 13:04:53,933 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 741 transitions. Word has length 40 [2021-05-02 13:04:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:53,933 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 741 transitions. [2021-05-02 13:04:53,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 741 transitions. [2021-05-02 13:04:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 13:04:53,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:53,937 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:54,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:54,159 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1046867033, now seen corresponding path program 6 times [2021-05-02 13:04:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802058220] [2021-05-02 13:04:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:54,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 13:04:54,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802058220] [2021-05-02 13:04:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802058220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:54,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682990231] [2021-05-02 13:04:54,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:54,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:04:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:04:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:04:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682990231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:54,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:54,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-02 13:04:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553138500] [2021-05-02 13:04:54,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:04:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:04:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:04:54,658 INFO L87 Difference]: Start difference. First operand 590 states and 741 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:55,242 INFO L93 Difference]: Finished difference Result 785 states and 1016 transitions. [2021-05-02 13:04:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:04:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 13:04:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:55,245 INFO L225 Difference]: With dead ends: 785 [2021-05-02 13:04:55,245 INFO L226 Difference]: Without dead ends: 754 [2021-05-02 13:04:55,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:04:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-05-02 13:04:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 581. [2021-05-02 13:04:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 1.2725694444444444) internal successors, (733), 576 states have internal predecessors, (733), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 737 transitions. [2021-05-02 13:04:55,265 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 737 transitions. Word has length 41 [2021-05-02 13:04:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:55,265 INFO L480 AbstractCegarLoop]: Abstraction has 581 states and 737 transitions. [2021-05-02 13:04:55,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 737 transitions. [2021-05-02 13:04:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 13:04:55,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:55,266 INFO L523 BasicCegarLoop]: trace histogram [17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:55,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:04:55,466 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash -92727513, now seen corresponding path program 4 times [2021-05-02 13:04:55,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:55,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678629152] [2021-05-02 13:04:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:56,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:04:56,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678629152] [2021-05-02 13:04:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678629152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491522842] [2021-05-02 13:04:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:56,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:04:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:04:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:56,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:04:56,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491522842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:56,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:56,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 13:04:56,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962332757] [2021-05-02 13:04:56,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:04:56,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:04:56,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:04:56,274 INFO L87 Difference]: Start difference. First operand 581 states and 737 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:00,011 INFO L93 Difference]: Finished difference Result 1008 states and 1497 transitions. [2021-05-02 13:05:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:05:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 13:05:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:00,014 INFO L225 Difference]: With dead ends: 1008 [2021-05-02 13:05:00,014 INFO L226 Difference]: Without dead ends: 954 [2021-05-02 13:05:00,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1530.4ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:05:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-05-02 13:05:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 610. [2021-05-02 13:05:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.2760330578512398) internal successors, (772), 605 states have internal predecessors, (772), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 776 transitions. [2021-05-02 13:05:00,035 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 776 transitions. Word has length 41 [2021-05-02 13:05:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:00,035 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 776 transitions. [2021-05-02 13:05:00,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 776 transitions. [2021-05-02 13:05:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:05:00,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:00,036 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:00,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:00,237 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 455732725, now seen corresponding path program 13 times [2021-05-02 13:05:00,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:00,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897042217] [2021-05-02 13:05:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:00,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 13:05:00,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:00,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897042217] [2021-05-02 13:05:00,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897042217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:00,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359225811] [2021-05-02 13:05:00,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:05:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:00,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 13:05:00,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359225811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:00,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:00,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 13:05:00,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411015542] [2021-05-02 13:05:00,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:05:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:05:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:05:00,753 INFO L87 Difference]: Start difference. First operand 610 states and 776 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:02,377 INFO L93 Difference]: Finished difference Result 744 states and 941 transitions. [2021-05-02 13:05:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:05:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 13:05:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:02,380 INFO L225 Difference]: With dead ends: 744 [2021-05-02 13:05:02,380 INFO L226 Difference]: Without dead ends: 717 [2021-05-02 13:05:02,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 989.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:05:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-05-02 13:05:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 610. [2021-05-02 13:05:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.2743801652892561) internal successors, (771), 605 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 775 transitions. [2021-05-02 13:05:02,403 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 775 transitions. Word has length 42 [2021-05-02 13:05:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:02,403 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 775 transitions. [2021-05-02 13:05:02,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 775 transitions. [2021-05-02 13:05:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:05:02,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:02,404 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:02,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:02,604 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1628968459, now seen corresponding path program 14 times [2021-05-02 13:05:02,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:02,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166823251] [2021-05-02 13:05:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:03,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 13:05:03,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166823251] [2021-05-02 13:05:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166823251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:03,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066720217] [2021-05-02 13:05:03,019 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:05:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:05:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:05:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:05:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066720217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:03,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:03,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2021-05-02 13:05:03,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626926680] [2021-05-02 13:05:03,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:05:03,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:05:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:05:03,485 INFO L87 Difference]: Start difference. First operand 610 states and 775 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:04,577 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:05,038 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:05:05,507 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:05:05,952 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:06,349 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:05:06,690 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:05:07,193 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:05:07,658 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:05:08,058 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:05:08,425 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:05:08,815 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:05:09,280 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:05:09,784 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:05:10,124 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:10,376 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:10,726 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:05:11,071 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:05:11,537 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:05:11,966 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:05:12,430 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:13,116 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:05:13,485 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:05:13,904 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:05:14,243 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:14,655 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:05:15,028 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:15,738 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:16,088 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:20,942 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:05:21,720 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:05:22,886 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:23,327 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:23,982 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:24,402 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:05:25,192 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:25,960 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:26,713 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:27,287 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:27,819 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:28,445 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:05:29,255 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:29,949 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:30,474 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:31,090 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:31,570 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:32,461 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:05:33,349 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:33,824 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:05:34,463 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:35,007 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:35,698 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:36,482 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:37,026 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:37,941 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:38,258 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:05:38,771 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:05:39,607 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:40,258 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:05:40,707 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:41,251 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:41,711 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:05:42,248 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:42,540 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:42,957 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:43,405 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:05:44,044 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:05:44,563 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:45,281 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:05:46,301 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:47,067 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:47,610 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:05:47,984 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:48,644 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:05:49,080 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:50,458 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:50,969 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:51,277 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:05:51,558 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:51,886 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:05:52,239 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:05:52,734 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:53,686 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:54,181 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:05:54,425 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:05:54,800 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:05:55,225 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:55,546 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:05:56,022 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:05:56,448 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:05:57,661 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:58,117 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:05:58,324 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:05:58,543 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:05:59,012 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:05:59,325 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:05:59,744 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:06:00,197 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:06:01,334 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:06:01,891 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:06:02,224 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:06:02,521 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:06:03,093 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:03,460 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:03,954 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:06:05,860 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:06,546 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:06:07,035 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:07,440 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:08,007 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:06:10,147 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:10,368 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:06:10,716 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:06:11,011 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:06:11,691 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:12,058 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:13,990 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:06:14,678 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:06:15,178 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:06:16,391 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:06:17,487 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:06:17,910 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:06:18,533 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:06:20,993 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:06:21,204 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:06:22,248 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:06:23,057 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:06:24,556 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:06:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:26,833 INFO L93 Difference]: Finished difference Result 1976 states and 2452 transitions. [2021-05-02 13:06:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 332 states. [2021-05-02 13:06:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 13:06:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:26,838 INFO L225 Difference]: With dead ends: 1976 [2021-05-02 13:06:26,838 INFO L226 Difference]: Without dead ends: 1829 [2021-05-02 13:06:26,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54818 ImplicationChecksByTransitivity, 72173.9ms TimeCoverageRelationStatistics Valid=7646, Invalid=119446, Unknown=0, NotChecked=0, Total=127092 [2021-05-02 13:06:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-05-02 13:06:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 604. [2021-05-02 13:06:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 599 states have (on average 1.2687813021702838) internal successors, (760), 599 states have internal predecessors, (760), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 764 transitions. [2021-05-02 13:06:26,868 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 764 transitions. Word has length 42 [2021-05-02 13:06:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:26,869 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 764 transitions. [2021-05-02 13:06:26,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 764 transitions. [2021-05-02 13:06:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:06:26,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:26,869 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:27,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 13:06:27,070 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:27,070 INFO L82 PathProgramCache]: Analyzing trace with hash -209000572, now seen corresponding path program 9 times [2021-05-02 13:06:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:27,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494796362] [2021-05-02 13:06:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:27,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:27,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494796362] [2021-05-02 13:06:27,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494796362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:27,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141570096] [2021-05-02 13:06:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:28,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 13:06:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 13:06:28,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:28,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141570096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:28,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:28,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-05-02 13:06:28,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356312827] [2021-05-02 13:06:28,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:06:28,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:28,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:06:28,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:06:28,498 INFO L87 Difference]: Start difference. First operand 604 states and 764 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:41,186 INFO L93 Difference]: Finished difference Result 930 states and 1334 transitions. [2021-05-02 13:06:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:06:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 13:06:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:41,191 INFO L225 Difference]: With dead ends: 930 [2021-05-02 13:06:41,191 INFO L226 Difference]: Without dead ends: 833 [2021-05-02 13:06:41,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4775 ImplicationChecksByTransitivity, 8069.8ms TimeCoverageRelationStatistics Valid=702, Invalid=13818, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 13:06:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-05-02 13:06:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 667. [2021-05-02 13:06:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.270392749244713) internal successors, (841), 662 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 845 transitions. [2021-05-02 13:06:41,213 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 845 transitions. Word has length 42 [2021-05-02 13:06:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:41,214 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 845 transitions. [2021-05-02 13:06:41,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 845 transitions. [2021-05-02 13:06:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:06:41,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:41,214 INFO L523 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:41,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:41,415 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1905896580, now seen corresponding path program 5 times [2021-05-02 13:06:41,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:41,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397644985] [2021-05-02 13:06:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:42,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:06:42,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397644985] [2021-05-02 13:06:42,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397644985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:42,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317071227] [2021-05-02 13:06:42,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:44,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 13:06:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:06:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:06:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317071227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 29 [2021-05-02 13:06:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305941709] [2021-05-02 13:06:45,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 13:06:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 13:06:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:06:45,677 INFO L87 Difference]: Start difference. First operand 667 states and 845 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:53,518 INFO L93 Difference]: Finished difference Result 1121 states and 1652 transitions. [2021-05-02 13:06:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 13:06:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 13:06:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:53,522 INFO L225 Difference]: With dead ends: 1121 [2021-05-02 13:06:53,522 INFO L226 Difference]: Without dead ends: 1066 [2021-05-02 13:06:53,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 3114.4ms TimeCoverageRelationStatistics Valid=191, Invalid=2779, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:06:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-05-02 13:06:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 698. [2021-05-02 13:06:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 693 states have (on average 1.274170274170274) internal successors, (883), 693 states have internal predecessors, (883), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 887 transitions. [2021-05-02 13:06:53,548 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 887 transitions. Word has length 42 [2021-05-02 13:06:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:53,548 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 887 transitions. [2021-05-02 13:06:53,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 887 transitions. [2021-05-02 13:06:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:06:53,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:53,549 INFO L523 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:53,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 13:06:53,755 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -561265977, now seen corresponding path program 6 times [2021-05-02 13:06:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:53,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726996732] [2021-05-02 13:06:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:54,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 13:06:54,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726996732] [2021-05-02 13:06:54,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726996732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884876018] [2021-05-02 13:06:54,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:54,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-02 13:06:54,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:06:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 13:06:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884876018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8] total 32 [2021-05-02 13:06:55,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679959688] [2021-05-02 13:06:55,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:06:55,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:06:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=922, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:06:55,343 INFO L87 Difference]: Start difference. First operand 698 states and 887 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:57,361 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:06:58,496 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-02 13:07:01,580 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-02 13:07:03,381 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:04,623 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:04,891 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:06,201 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:06,462 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:06,685 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-02 13:07:07,896 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:08,164 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:08,392 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-02 13:07:09,770 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:10,879 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:12,172 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-02 13:07:13,042 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-02 13:07:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:21,338 INFO L93 Difference]: Finished difference Result 1173 states and 1706 transitions. [2021-05-02 13:07:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 13:07:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 13:07:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:21,345 INFO L225 Difference]: With dead ends: 1173 [2021-05-02 13:07:21,345 INFO L226 Difference]: Without dead ends: 1053 [2021-05-02 13:07:21,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7526 ImplicationChecksByTransitivity, 17269.8ms TimeCoverageRelationStatistics Valid=1324, Invalid=22856, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 13:07:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-05-02 13:07:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 681. [2021-05-02 13:07:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 676 states have (on average 1.264792899408284) internal successors, (855), 676 states have internal predecessors, (855), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 859 transitions. [2021-05-02 13:07:21,376 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 859 transitions. Word has length 43 [2021-05-02 13:07:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 859 transitions. [2021-05-02 13:07:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 859 transitions. [2021-05-02 13:07:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:07:21,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:21,377 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:21,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:21,578 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1208050166, now seen corresponding path program 10 times [2021-05-02 13:07:21,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:21,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926074141] [2021-05-02 13:07:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:22,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926074141] [2021-05-02 13:07:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926074141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132558561] [2021-05-02 13:07:22,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:22,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:22,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:22,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:07:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-02 13:07:23,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132558561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:23,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:23,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-05-02 13:07:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937952597] [2021-05-02 13:07:23,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:07:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:07:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:07:23,786 INFO L87 Difference]: Start difference. First operand 681 states and 859 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:24,579 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:07:24,994 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:07:25,545 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:07:26,950 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:07:27,936 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:07:29,245 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 13:07:30,849 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:07:32,369 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:07:33,978 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 13:07:35,798 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 13:07:38,330 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:07:40,297 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:07:41,731 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:07:43,679 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 13:07:46,111 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 13:07:48,492 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 13:07:49,594 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:07:50,825 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:07:52,819 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 13:07:54,304 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 13:07:56,034 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:07:56,577 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:07:57,219 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:07:58,765 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:08:00,233 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 13:08:02,277 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:08:02,590 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:08:03,174 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:08:04,010 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:08:05,313 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:08:07,666 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 13:08:08,299 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:08:08,829 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:08:09,478 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:08:10,685 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:08:12,271 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:08:12,691 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:08:12,939 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:13,435 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:08:14,062 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:08:15,174 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:08:16,491 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:08:16,942 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:08:17,389 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:08:17,818 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:08:18,484 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:08:19,120 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:08:19,527 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:08:19,818 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:20,290 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:08:20,668 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:08:21,254 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:08:21,703 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 13:08:21,978 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:22,336 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:22,696 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:08:23,102 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:23,562 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:08:23,856 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:24,185 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:08:24,669 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:08:25,047 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:08:25,465 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 13:08:26,689 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:08:26,957 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 13:08:28,429 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:08:28,711 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:08:29,934 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:08:31,926 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:08:32,195 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:08:33,293 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:08:33,507 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:08:34,336 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:08:37,474 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:08:38,289 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:08:40,792 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:08:42,039 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:08:42,300 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:08:43,375 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:08:46,976 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:08:47,410 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:08:48,408 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:08:50,851 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:08:53,742 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:08:54,359 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:08:56,210 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:08:59,259 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:09:00,996 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:09:03,520 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:09:06,445 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:09:07,430 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:09:10,055 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:09:10,566 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:09:11,743 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:09:14,575 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:09:15,821 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:09:17,544 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:09:20,465 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:09:22,910 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:09:25,589 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:09:26,221 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:09:26,551 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:09:27,609 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:09:28,356 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:09:29,446 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:09:31,416 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:09:33,742 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 63 [2021-05-02 13:09:36,441 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:09:36,819 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:09:37,602 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:09:38,553 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:09:39,530 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:09:40,662 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:09:42,601 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-02 13:09:44,926 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:09:46,182 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:09:46,859 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:09:47,814 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:09:50,540 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 67 [2021-05-02 13:09:51,937 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 13:09:54,583 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:09:58,217 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:09:59,067 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:10:01,483 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:10:04,496 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:10:05,966 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:10:07,710 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:10:10,654 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:10:12,030 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:10:13,712 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:10:15,568 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:10:19,067 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 13:10:20,142 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:10:22,899 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:10:24,498 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:10:25,233 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:10:26,522 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:10:28,102 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:10:30,436 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:10:32,743 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-02 13:10:34,111 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:10:36,284 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:10:38,497 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:10:39,217 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:10:39,663 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:10:39,974 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:10:40,885 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:10:41,657 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:10:43,284 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:10:44,507 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:10:45,933 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:10:48,374 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:10:50,242 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:10:50,729 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:10:51,143 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:10:51,513 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:10:51,955 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:10:52,421 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:10:53,002 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:10:54,033 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:10:55,158 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:10:56,617 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:10:57,374 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:10:59,921 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:01,283 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:11:04,205 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:05,492 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:11:06,047 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:11:06,720 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:11:07,038 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:11:07,340 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:11:07,619 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:08,072 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:11:08,605 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:11:09,408 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:11:10,445 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 13:11:11,185 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:11:11,963 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:11:14,275 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:15,849 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:11:18,341 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:19,434 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:11:19,942 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:20,712 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:11:21,097 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:21,399 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:11:21,691 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:22,222 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:11:22,785 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:11:23,429 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:11:24,518 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:11:25,701 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:11:27,151 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:11:30,812 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:32,636 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:11:33,275 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:33,817 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:11:34,424 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:11:34,857 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:11:35,258 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:35,677 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:36,204 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:36,813 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:11:37,116 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:11:37,427 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:11:37,801 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:11:38,568 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:11:39,792 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:11:41,952 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:11:42,778 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:11:43,709 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:11:44,944 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:11:47,955 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:11:49,366 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:49,924 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:11:50,384 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:11:50,827 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:51,248 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:11:51,668 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:52,115 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:11:52,494 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:11:52,740 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:11:53,247 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:11:54,179 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 13:11:54,872 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:11:57,128 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:11:57,988 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:11:59,217 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:00,862 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:12:04,092 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:12:05,155 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:05,674 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:06,185 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 13:12:06,604 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:12:06,981 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:07,378 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:12:07,910 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:08,505 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:08,828 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:12:09,149 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 13:12:09,463 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:10,313 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:12:10,805 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:11,666 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:12:12,627 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:13,135 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:15,055 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:12:15,792 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:12:16,960 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:19,137 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:12:19,732 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:20,499 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:20,860 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:21,259 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:21,664 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:21,936 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:22,192 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:22,473 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:23,083 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:12:23,870 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:12:24,416 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:12:25,561 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:12:26,126 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:26,431 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:12:27,234 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:27,981 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:12:28,529 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:30,390 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:12:31,674 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:12:32,490 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:12:33,935 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:12:35,116 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:37,484 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:12:37,854 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:38,531 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 13:12:38,853 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:39,138 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:12:39,458 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:39,707 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:12:40,202 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:40,473 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:40,761 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:12:41,466 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 13:12:41,957 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:42,515 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:12:43,599 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:44,334 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:12:44,738 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:45,674 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:46,408 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:12:46,855 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:48,397 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:12:49,148 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:12:49,794 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:12:51,446 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 13:12:52,178 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:52,587 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:12:52,956 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:12:53,255 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:53,531 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 13:12:53,825 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:54,117 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:12:54,692 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:12:55,256 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:56,102 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:12:56,400 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:12:57,492 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:12:58,317 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:12:58,901 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:12:59,327 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:13:00,406 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:13:01,114 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:01,765 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:03,351 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:13:04,472 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:13:05,240 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:13:05,638 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:13:05,940 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:13:06,241 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:06,526 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:06,836 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:07,805 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:08,711 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:09,389 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:09,976 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:10,300 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:11,362 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:13:12,242 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:12,798 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:13,158 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:13:14,350 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-02 13:13:15,380 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:15,807 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 13:13:16,126 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:16,423 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:16,762 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:17,107 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:17,770 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 13:13:18,709 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:19,313 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:13:20,111 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:20,681 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:21,011 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:22,261 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:13:23,155 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 13:13:23,802 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:24,167 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:13:24,503 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:24,856 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 13:13:25,216 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:25,802 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:26,600 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:27,112 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:13:28,011 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:28,591 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:28,914 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:29,201 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:29,482 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:30,024 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:30,510 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:13:31,243 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:31,827 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:32,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:13:32,431 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:32,726 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:33,269 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:33,850 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:13:34,155 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:34,454 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:35,088 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 13:13:35,408 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 13:13:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:35,414 INFO L93 Difference]: Finished difference Result 2549 states and 3128 transitions. [2021-05-02 13:13:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 415 states. [2021-05-02 13:13:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 13:13:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:35,419 INFO L225 Difference]: With dead ends: 2549 [2021-05-02 13:13:35,420 INFO L226 Difference]: Without dead ends: 2392 [2021-05-02 13:13:35,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86807 ImplicationChecksByTransitivity, 330790.7ms TimeCoverageRelationStatistics Valid=11656, Invalid=184150, Unknown=0, NotChecked=0, Total=195806 [2021-05-02 13:13:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-05-02 13:13:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 709. [2021-05-02 13:13:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 704 states have (on average 1.265625) internal successors, (891), 704 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 895 transitions. [2021-05-02 13:13:35,474 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 895 transitions. Word has length 44 [2021-05-02 13:13:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:35,474 INFO L480 AbstractCegarLoop]: Abstraction has 709 states and 895 transitions. [2021-05-02 13:13:35,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 895 transitions. [2021-05-02 13:13:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:13:35,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:35,475 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:35,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:13:35,676 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1364837992, now seen corresponding path program 11 times [2021-05-02 13:13:35,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:35,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881778780] [2021-05-02 13:13:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:38,576 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2021-05-02 13:13:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:13:38,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:38,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881778780] [2021-05-02 13:13:38,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881778780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:38,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940229876] [2021-05-02 13:13:38,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:42,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 13:13:42,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:13:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:13:46,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940229876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:46,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:46,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2021-05-02 13:13:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527792369] [2021-05-02 13:13:46,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:13:46,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:13:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:13:46,168 INFO L87 Difference]: Start difference. First operand 709 states and 895 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:46,844 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 13:13:47,290 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 13:13:47,908 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 13:13:48,703 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 13:13:49,632 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 13:13:51,041 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-02 13:14:00,063 WARN L205 SmtUtils]: Spent 5.45 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:14:02,413 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 13:14:11,042 WARN L205 SmtUtils]: Spent 4.43 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 13:14:19,463 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:14:24,232 WARN L205 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 13:14:36,139 WARN L205 SmtUtils]: Spent 5.72 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 13:14:46,105 WARN L205 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 13:14:58,583 WARN L205 SmtUtils]: Spent 4.28 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:15:03,942 WARN L205 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 13:15:09,147 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 13:15:15,456 WARN L205 SmtUtils]: Spent 3.61 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 13:15:22,418 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 13:15:29,505 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:15:37,343 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-02 13:15:40,909 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 13:15:45,477 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 70