/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:20:42,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:20:42,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:20:42,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:20:42,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:20:42,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:20:42,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:20:42,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:20:42,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:20:42,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:20:42,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:20:42,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:20:42,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:20:42,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:20:42,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:20:42,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:20:42,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:20:42,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:20:42,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:20:42,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:20:42,891 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 [2021-05-06 02:20:42,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:20:42,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:20:42,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:20:42,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:20:42,934 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:20:42,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:20:42,934 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:20:42,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:20:42,936 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:20:42,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:20:42,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:20:42,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:20:42,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:20:42,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:20:42,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:20:42,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:20:42,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:20:42,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:20:42,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:20:42,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:20:42,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:20:42,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:20:42,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:20:42,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:20:43,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:20:43,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:20:43,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:20:43,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:20:43,305 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:20:43,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 02:20:43,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1993f2ebd/ac0a6ea371ad4a9896c51485c50c4cdc/FLAGe028de778 [2021-05-06 02:20:43,814 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:20:43,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 02:20:43,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1993f2ebd/ac0a6ea371ad4a9896c51485c50c4cdc/FLAGe028de778 [2021-05-06 02:20:44,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1993f2ebd/ac0a6ea371ad4a9896c51485c50c4cdc [2021-05-06 02:20:44,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:20:44,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:20:44,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:20:44,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:20:44,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:20:44,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c587bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44, skipping insertion in model container [2021-05-06 02:20:44,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:20:44,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:20:44,360 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2021-05-06 02:20:44,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:20:44,389 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:20:44,399 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c[489,502] [2021-05-06 02:20:44,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:20:44,418 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:20:44,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44 WrapperNode [2021-05-06 02:20:44,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:20:44,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:20:44,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:20:44,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:20:44,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (1/1) ... [2021-05-06 02:20:44,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:20:44,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:20:44,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:20:44,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:20:44,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (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 [2021-05-06 02:20:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:20:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:20:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:20:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:20:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:20:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:20:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:20:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:20:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:20:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:20:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:20:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:20:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:20:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:20:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:20:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:20:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:20:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:20:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:20:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:20:44,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:20:44,784 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:20:44,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:20:44 BoogieIcfgContainer [2021-05-06 02:20:44,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:20:44,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:20:44,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:20:44,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:20:44,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:20:44" (1/3) ... [2021-05-06 02:20:44,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3b4cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:20:44, skipping insertion in model container [2021-05-06 02:20:44,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:20:44" (2/3) ... [2021-05-06 02:20:44,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3b4cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:20:44, skipping insertion in model container [2021-05-06 02:20:44,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:20:44" (3/3) ... [2021-05-06 02:20:44,792 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2021-05-06 02:20:44,797 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:20:44,801 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:20:44,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:20:44,841 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:20:44,841 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:20:44,841 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:20:44,841 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:20:44,841 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:20:44,841 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:20:44,841 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:20:44,841 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:20:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:20:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:20:44,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:44,899 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:44,899 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:44,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:20:44,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:44,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501103835] [2021-05-06 02:20:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:20:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:20:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:20:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:20:45,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:45,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501103835] [2021-05-06 02:20:45,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501103835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:45,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:45,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:20:45,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387396081] [2021-05-06 02:20:45,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:20:45,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:20:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:20:45,289 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:20:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:45,444 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:20:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:20:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:20:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:45,454 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:20:45,454 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:20:45,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:20:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:20:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:20:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:20:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:20:45,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:20:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:45,491 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:20:45,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:20:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:20:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:20:45,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:45,493 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:45,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:20:45,494 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:20:45,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:45,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121021290] [2021-05-06 02:20:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:20:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:20:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:20:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:20:45,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:45,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121021290] [2021-05-06 02:20:45,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121021290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:45,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:45,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:20:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702523270] [2021-05-06 02:20:45,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:45,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:45,649 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:20:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:45,768 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:20:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:20:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:20:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:45,769 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:20:45,770 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:20:45,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:20:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:20:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:20:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:20:45,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:20:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:45,781 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:20:45,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:20:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:20:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:20:45,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:45,782 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:45,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:20:45,783 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:20:45,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:45,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257990623] [2021-05-06 02:20:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:45,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308243706] [2021-05-06 02:20:45,797 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 [2021-05-06 02:20:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:20:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:20:45,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257990623] [2021-05-06 02:20:45,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:45,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308243706] [2021-05-06 02:20:45,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308243706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:45,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:45,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:20:45,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411149548] [2021-05-06 02:20:45,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:45,988 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:20:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:46,032 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:20:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:20:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:20:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:46,034 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:20:46,034 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:20:46,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:20:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:20:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:20:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:20:46,045 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:20:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:46,046 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:20:46,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:20:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:20:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:20:46,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:46,047 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:46,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:20:46,257 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:20:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577364033] [2021-05-06 02:20:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:46,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:46,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225885862] [2021-05-06 02:20:46,280 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 [2021-05-06 02:20:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:20:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:46,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:46,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:46,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:46,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:20:46,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:46,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577364033] [2021-05-06 02:20:46,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:46,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225885862] [2021-05-06 02:20:46,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225885862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:46,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:46,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:20:46,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442145470] [2021-05-06 02:20:46,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:20:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:20:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:46,513 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:20:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:46,650 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:20:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:20:46,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:20:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:46,656 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:20:46,656 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:20:46,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:20:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:20:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:20:46,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:20:46,689 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:20:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:46,690 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:20:46,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:20:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:20:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:20:46,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:46,692 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:46,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:46,917 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:20:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:46,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401322299] [2021-05-06 02:20:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:46,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642642167] [2021-05-06 02:20:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:20:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:47,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:20:47,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:47,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401322299] [2021-05-06 02:20:47,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:47,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642642167] [2021-05-06 02:20:47,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642642167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:47,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:47,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:20:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660402141] [2021-05-06 02:20:47,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:47,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:47,140 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:20:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:47,195 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:20:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:20:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:20:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:47,196 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:20:47,196 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:20:47,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:20:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:20:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:20:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:20:47,207 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:20:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:47,207 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:20:47,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:20:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:20:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:20:47,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:47,208 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:47,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:47,434 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:47,434 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:20:47,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:47,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29211474] [2021-05-06 02:20:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:47,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:47,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678064769] [2021-05-06 02:20:47,458 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 [2021-05-06 02:20:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:47,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:20:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:20:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29211474] [2021-05-06 02:20:47,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678064769] [2021-05-06 02:20:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678064769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:47,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:20:47,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338833030] [2021-05-06 02:20:47,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:47,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:47,619 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:20:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:47,679 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:20:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:20:47,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:20:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:47,682 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:20:47,682 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:20:47,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:20:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:20:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:20:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:20:47,692 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:20:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:47,693 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:20:47,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:20:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:20:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:20:47,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:47,694 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:47,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:47,901 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:47,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:20:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:47,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776036272] [2021-05-06 02:20:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:47,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:47,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117116041] [2021-05-06 02:20:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:20:47,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:47,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:47,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:47,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:20:48,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776036272] [2021-05-06 02:20:48,069 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:48,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117116041] [2021-05-06 02:20:48,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117116041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:48,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:48,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:20:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031985706] [2021-05-06 02:20:48,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:48,071 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:20:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:48,128 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:20:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:20:48,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:20:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:48,130 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:20:48,131 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:20:48,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:20:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:20:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:20:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:20:48,154 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:20:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:48,154 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:20:48,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:20:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:20:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:20:48,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:48,155 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:48,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:20:48,369 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:20:48,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:48,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777947355] [2021-05-06 02:20:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:48,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:48,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53174877] [2021-05-06 02:20:48,383 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 [2021-05-06 02:20:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:20:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:48,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:20:48,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777947355] [2021-05-06 02:20:48,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53174877] [2021-05-06 02:20:48,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53174877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:20:48,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:20:48,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:20:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722439195] [2021-05-06 02:20:48,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:20:48,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:48,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:20:48,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:20:48,566 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:20:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:48,614 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:20:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:20:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 02:20:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:48,616 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:20:48,616 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:20:48,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:20:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:20:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:20:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:20:48,629 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:20:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:48,629 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:20:48,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:20:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:20:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:20:48,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:48,630 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:48,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:48,841 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:20:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:48,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945876607] [2021-05-06 02:20:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:48,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:48,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931200087] [2021-05-06 02:20:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:20:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:49,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:20:49,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945876607] [2021-05-06 02:20:49,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931200087] [2021-05-06 02:20:49,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931200087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:49,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:49,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:20:49,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833031004] [2021-05-06 02:20:49,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:20:49,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:20:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:49,047 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:20:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:49,203 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:20:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:20:49,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 02:20:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:49,205 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:20:49,205 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:20:49,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:20:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:20:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:20:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:20:49,221 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:20:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:49,221 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:20:49,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:20:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:20:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:20:49,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:49,222 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:49,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:49,443 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:20:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:49,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428508789] [2021-05-06 02:20:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:49,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:49,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283592804] [2021-05-06 02:20:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:20:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:20:49,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:49,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428508789] [2021-05-06 02:20:49,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:49,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283592804] [2021-05-06 02:20:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283592804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:49,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:49,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:20:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768949918] [2021-05-06 02:20:49,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:20:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:49,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:20:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:20:49,761 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:20:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:49,967 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:20:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:20:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:20:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:49,972 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:20:49,972 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:20:49,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:20:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:20:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:20:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:20:50,001 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:20:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:50,001 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:20:50,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:20:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:20:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:20:50,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:50,004 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:50,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:20:50,225 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:20:50,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:50,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006741559] [2021-05-06 02:20:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:50,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:50,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300654632] [2021-05-06 02:20:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:50,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:20:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:20:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:50,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:20:50,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006741559] [2021-05-06 02:20:50,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300654632] [2021-05-06 02:20:50,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300654632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:50,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:50,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:20:50,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887035991] [2021-05-06 02:20:50,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:20:50,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:20:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:50,439 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:20:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:50,616 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:20:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:20:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:20:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:50,618 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:20:50,618 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:20:50,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:20:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:20:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:20:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:20:50,635 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:20:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:50,635 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:20:50,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:20:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:20:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:20:50,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:50,658 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:50,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:50,859 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:20:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:50,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224547676] [2021-05-06 02:20:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:50,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:50,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566722645] [2021-05-06 02:20:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:50,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:20:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:20:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:50,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:20:51,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:51,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224547676] [2021-05-06 02:20:51,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:51,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566722645] [2021-05-06 02:20:51,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566722645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:51,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:51,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:20:51,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670324353] [2021-05-06 02:20:51,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:20:51,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:20:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:51,089 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:20:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:51,163 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-06 02:20:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:20:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:20:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:51,165 INFO L225 Difference]: With dead ends: 199 [2021-05-06 02:20:51,165 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:20:51,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:20:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:20:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:20:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 02:20:51,181 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 02:20:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:51,181 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 02:20:51,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:20:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 02:20:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:20:51,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:51,183 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:51,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:51,406 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-06 02:20:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:51,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975007980] [2021-05-06 02:20:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:51,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:51,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489646304] [2021-05-06 02:20:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:20:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:51,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:20:51,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975007980] [2021-05-06 02:20:51,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:51,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489646304] [2021-05-06 02:20:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489646304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:51,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:51,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:20:51,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862147398] [2021-05-06 02:20:51,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:20:51,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:20:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:20:51,629 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:20:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:51,740 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-06 02:20:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:20:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:20:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:51,741 INFO L225 Difference]: With dead ends: 188 [2021-05-06 02:20:51,741 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 02:20:51,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 02:20:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 02:20:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:20:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:20:51,776 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 02:20:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:51,776 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:20:51,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:20:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:20:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:20:51,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:51,777 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:51,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:20:51,983 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-06 02:20:51,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:51,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681693264] [2021-05-06 02:20:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:51,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:51,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505137600] [2021-05-06 02:20:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:52,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:20:52,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:52,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:20:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:52,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:20:52,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681693264] [2021-05-06 02:20:52,244 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505137600] [2021-05-06 02:20:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505137600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:52,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:52,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:20:52,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168327442] [2021-05-06 02:20:52,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:20:52,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:20:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:20:52,246 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:20:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:52,357 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-06 02:20:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:20:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:20:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:52,359 INFO L225 Difference]: With dead ends: 198 [2021-05-06 02:20:52,359 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:20:52,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:20:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:20:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:20:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 02:20:52,375 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 02:20:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:52,376 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 02:20:52,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:20:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 02:20:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:20:52,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:52,377 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:52,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:20:52,605 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-06 02:20:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130028158] [2021-05-06 02:20:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:52,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:52,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335113477] [2021-05-06 02:20:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:52,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:20:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:52,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:20:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 02:20:52,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130028158] [2021-05-06 02:20:52,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335113477] [2021-05-06 02:20:52,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335113477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:52,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:52,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:20:52,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805212379] [2021-05-06 02:20:52,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:20:52,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:20:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:52,961 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:20:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:53,270 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-06 02:20:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:20:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:20:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:53,273 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:20:53,273 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 02:20:53,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:20:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 02:20:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 02:20:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:20:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 02:20:53,295 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 02:20:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:53,295 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 02:20:53,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:20:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 02:20:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:20:53,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:53,297 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:53,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:20:53,514 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-06 02:20:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:53,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045752952] [2021-05-06 02:20:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:53,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:53,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964742100] [2021-05-06 02:20:53,522 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 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 [2021-05-06 02:20:53,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:20:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:20:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:20:53,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045752952] [2021-05-06 02:20:53,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964742100] [2021-05-06 02:20:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964742100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:53,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:53,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:20:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298212353] [2021-05-06 02:20:53,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:20:53,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:20:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:53,820 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:20:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:53,981 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-06 02:20:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:20:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:20:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:53,983 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:20:53,983 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:20:53,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:20:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:20:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 02:20:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:20:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 02:20:54,001 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 02:20:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:54,001 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 02:20:54,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:20:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 02:20:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:20:54,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:54,002 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:54,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:54,217 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-06 02:20:54,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:54,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121879542] [2021-05-06 02:20:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:54,225 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794068947] [2021-05-06 02:20:54,225 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 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 [2021-05-06 02:20:54,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:20:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:20:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:54,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 43 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 02:20:54,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:54,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121879542] [2021-05-06 02:20:54,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:54,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794068947] [2021-05-06 02:20:54,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794068947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:54,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:54,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:20:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357306053] [2021-05-06 02:20:54,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:20:54,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:20:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:54,524 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:20:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:54,818 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-06 02:20:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:20:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:20:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:54,820 INFO L225 Difference]: With dead ends: 242 [2021-05-06 02:20:54,820 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 02:20:54,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 02:20:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 02:20:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:20:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 02:20:54,838 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 02:20:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:54,839 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 02:20:54,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:20:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 02:20:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:20:54,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:54,840 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:55,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:20:55,053 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-06 02:20:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:55,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447533513] [2021-05-06 02:20:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:55,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:55,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525728620] [2021-05-06 02:20:55,061 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 [2021-05-06 02:20:55,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:20:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:20:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:55,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:20:55,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:55,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447533513] [2021-05-06 02:20:55,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525728620] [2021-05-06 02:20:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525728620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:55,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:55,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:20:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088354676] [2021-05-06 02:20:55,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:20:55,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:20:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:55,361 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:20:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:55,663 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2021-05-06 02:20:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:20:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:20:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:55,665 INFO L225 Difference]: With dead ends: 229 [2021-05-06 02:20:55,665 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:20:55,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:20:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 02:20:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 02:20:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 02:20:55,683 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 02:20:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:55,684 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 02:20:55,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:20:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 02:20:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:20:55,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:55,685 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:55,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:20:55,903 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-06 02:20:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:55,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264138738] [2021-05-06 02:20:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:55,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:55,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182593682] [2021-05-06 02:20:55,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:55,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:20:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:20:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:56,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:20:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:56,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264138738] [2021-05-06 02:20:56,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:56,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182593682] [2021-05-06 02:20:56,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182593682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:56,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:56,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:20:56,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402828355] [2021-05-06 02:20:56,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:20:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:20:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:20:56,137 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:20:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:56,240 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-06 02:20:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:20:56,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 02:20:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:56,242 INFO L225 Difference]: With dead ends: 269 [2021-05-06 02:20:56,242 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:20:56,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:20:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 02:20:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:20:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 02:20:56,259 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 02:20:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:56,260 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 02:20:56,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:20:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 02:20:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:20:56,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:56,261 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:56,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:56,471 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-06 02:20:56,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:56,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506939404] [2021-05-06 02:20:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:56,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227125421] [2021-05-06 02:20:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:56,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:20:56,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:20:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:57,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 02:20:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506939404] [2021-05-06 02:20:57,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227125421] [2021-05-06 02:20:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227125421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:20:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80421110] [2021-05-06 02:20:57,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:20:57,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:20:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:20:57,045 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:20:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:57,141 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-06 02:20:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:20:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-05-06 02:20:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:57,143 INFO L225 Difference]: With dead ends: 266 [2021-05-06 02:20:57,143 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 02:20:57,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:20:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 02:20:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 02:20:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:20:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 02:20:57,162 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 02:20:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:57,164 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 02:20:57,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:20:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 02:20:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:20:57,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:57,165 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:57,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:57,375 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-06 02:20:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:57,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514822232] [2021-05-06 02:20:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:57,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:57,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691920975] [2021-05-06 02:20:57,386 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 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 [2021-05-06 02:20:57,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:20:57,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:20:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 02:20:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514822232] [2021-05-06 02:20:57,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691920975] [2021-05-06 02:20:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691920975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:57,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:57,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:20:57,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641701760] [2021-05-06 02:20:57,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:20:57,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:57,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:20:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:20:57,634 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:20:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:57,726 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 02:20:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:20:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 02:20:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:57,728 INFO L225 Difference]: With dead ends: 256 [2021-05-06 02:20:57,728 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 02:20:57,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:20:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 02:20:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 02:20:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:20:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 02:20:57,750 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 02:20:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:57,750 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 02:20:57,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:20:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 02:20:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:20:57,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:57,751 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:57,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:57,977 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-06 02:20:57,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:57,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611330756] [2021-05-06 02:20:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:57,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:57,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463786402] [2021-05-06 02:20:57,983 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 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 [2021-05-06 02:20:58,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:20:58,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:20:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:20:58,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611330756] [2021-05-06 02:20:58,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463786402] [2021-05-06 02:20:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463786402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:58,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:58,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:20:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024731707] [2021-05-06 02:20:58,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:20:58,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:20:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:58,299 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:20:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:58,706 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-05-06 02:20:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:20:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:20:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:58,711 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:20:58,711 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 02:20:58,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 02:20:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 02:20:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:20:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 02:20:58,734 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 02:20:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:58,734 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 02:20:58,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:20:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 02:20:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:20:58,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:58,737 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:58,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:20:58,953 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2021-05-06 02:20:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:58,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075594009] [2021-05-06 02:20:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:58,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:58,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012941089] [2021-05-06 02:20:58,960 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 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 [2021-05-06 02:20:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:20:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:20:59,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075594009] [2021-05-06 02:20:59,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012941089] [2021-05-06 02:20:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012941089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:59,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:59,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:20:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70703479] [2021-05-06 02:20:59,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:20:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:20:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:59,379 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:21:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:21:00,142 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-05-06 02:21:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:21:00,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:21:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:21:00,145 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:21:00,145 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 02:21:00,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:21:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 02:21:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 02:21:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:21:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 02:21:00,169 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 02:21:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:21:00,169 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 02:21:00,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:21:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 02:21:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:21:00,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:21:00,171 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:21:00,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:21:00,385 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:21:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:21:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 8 times [2021-05-06 02:21:00,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:21:00,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991578769] [2021-05-06 02:21:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:21:00,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:21:00,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130211124] [2021-05-06 02:21:00,392 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 [2021-05-06 02:21:00,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:21:00,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:21:00,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:21:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:21:00,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:00,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:00,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 02:21:00,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:21:00,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991578769] [2021-05-06 02:21:00,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:21:00,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130211124] [2021-05-06 02:21:00,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130211124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:21:00,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:21:00,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:21:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670356068] [2021-05-06 02:21:00,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:21:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:21:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:21:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:21:00,743 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:21:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:21:01,309 INFO L93 Difference]: Finished difference Result 330 states and 406 transitions. [2021-05-06 02:21:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:21:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:21:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:21:01,311 INFO L225 Difference]: With dead ends: 330 [2021-05-06 02:21:01,311 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 02:21:01,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:21:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 02:21:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 02:21:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:21:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 02:21:01,338 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 02:21:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:21:01,338 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 02:21:01,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:21:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 02:21:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:21:01,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:21:01,340 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:21:01,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:21:01,561 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:21:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:21:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 9 times [2021-05-06 02:21:01,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:21:01,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147168616] [2021-05-06 02:21:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:21:01,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:21:01,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385953735] [2021-05-06 02:21:01,569 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 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 [2021-05-06 02:21:01,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:21:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:21:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:21:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:21:01,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 02:21:01,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:21:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147168616] [2021-05-06 02:21:01,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:21:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385953735] [2021-05-06 02:21:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385953735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:21:01,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:21:01,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:21:01,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651531037] [2021-05-06 02:21:01,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:21:01,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:21:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:21:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:21:01,856 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:21:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:21:02,330 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 02:21:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:21:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 02:21:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:21:02,332 INFO L225 Difference]: With dead ends: 346 [2021-05-06 02:21:02,332 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:21:02,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:21:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:21:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 02:21:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:21:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 02:21:02,366 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 02:21:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:21:02,367 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 02:21:02,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:21:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 02:21:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:21:02,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:21:02,369 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:21:02,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:21:02,589 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:21:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:21:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 10 times [2021-05-06 02:21:02,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:21:02,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135888316] [2021-05-06 02:21:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:21:02,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:21:02,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943122977] [2021-05-06 02:21:02,595 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 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 [2021-05-06 02:21:02,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:21:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:21:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:21:02,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:21:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:21:02,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:21:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135888316] [2021-05-06 02:21:02,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:21:02,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943122977] [2021-05-06 02:21:02,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943122977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:21:02,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:21:02,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:21:02,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301807900] [2021-05-06 02:21:02,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:21:02,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:21:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:21:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:21:02,943 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:21:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:21:03,242 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-05-06 02:21:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:21:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:21:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:21:03,245 INFO L225 Difference]: With dead ends: 325 [2021-05-06 02:21:03,245 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:21:03,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:21:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:21:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 02:21:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 02:21:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 02:21:03,273 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 02:21:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:21:03,274 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 02:21:03,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:21:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 02:21:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:21:03,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:21:03,275 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:21:03,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:21:03,485 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:21:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:21:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 11 times [2021-05-06 02:21:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:21:03,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32365920] [2021-05-06 02:21:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:21:03,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:21:03,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610584640] [2021-05-06 02:21:03,492 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 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 [2021-05-06 02:21:04,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:21:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:21:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:21:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:21:04,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:21:04,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:21:04,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32365920] [2021-05-06 02:21:04,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:21:04,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610584640] [2021-05-06 02:21:04,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610584640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:21:04,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:21:04,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:21:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681474970] [2021-05-06 02:21:04,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:21:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:21:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:21:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:21:04,922 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:21:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:21:05,476 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-06 02:21:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:21:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:21:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:21:05,478 INFO L225 Difference]: With dead ends: 359 [2021-05-06 02:21:05,478 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 02:21:05,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:21:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 02:21:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 02:21:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:21:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 02:21:05,509 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 02:21:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:21:05,509 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 02:21:05,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:21:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 02:21:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:21:05,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:21:05,511 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:21:05,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:21:05,718 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:21:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:21:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 12 times [2021-05-06 02:21:05,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:21:05,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501362827] [2021-05-06 02:21:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:21:05,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:21:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452132226] [2021-05-06 02:21:05,727 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 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 [2021-05-06 02:21:05,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:21:05,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:21:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:21:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:21:06,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:19,998 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 02:21:20,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:20,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:21:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:21:20,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:21:20,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501362827] [2021-05-06 02:21:20,035 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:21:20,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452132226] [2021-05-06 02:21:20,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452132226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:21:20,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:21:20,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:21:20,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553085773] [2021-05-06 02:21:20,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:21:20,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:21:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:21:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:21:20,036 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:22:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:22:17,705 INFO L93 Difference]: Finished difference Result 401 states and 512 transitions. [2021-05-06 02:22:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:22:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 02:22:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:22:17,708 INFO L225 Difference]: With dead ends: 401 [2021-05-06 02:22:17,708 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 02:22:17,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 14071.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:22:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 02:22:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 02:22:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:22:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 02:22:17,741 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 02:22:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:22:17,741 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 02:22:17,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:22:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 02:22:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:22:17,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:22:17,743 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:22:17,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:22:17,968 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:22:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:22:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 4 times [2021-05-06 02:22:17,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:22:17,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712155939] [2021-05-06 02:22:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:22:17,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:22:17,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208284622] [2021-05-06 02:22:17,973 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 [2021-05-06 02:22:18,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:22:18,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:22:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:22:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:22:18,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:22:18,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:22:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712155939] [2021-05-06 02:22:18,239 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:22:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208284622] [2021-05-06 02:22:18,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208284622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:22:18,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:22:18,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:22:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284556589] [2021-05-06 02:22:18,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:22:18,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:22:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:22:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:22:18,240 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:22:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:22:18,382 INFO L93 Difference]: Finished difference Result 490 states and 592 transitions. [2021-05-06 02:22:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:22:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 02:22:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:22:18,386 INFO L225 Difference]: With dead ends: 490 [2021-05-06 02:22:18,386 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 02:22:18,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:22:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 02:22:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 02:22:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:22:18,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 02:22:18,426 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 02:22:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:22:18,426 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 02:22:18,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:22:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 02:22:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:22:18,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:22:18,428 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:22:18,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:22:18,641 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:22:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:22:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 4 times [2021-05-06 02:22:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:22:18,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131889003] [2021-05-06 02:22:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:22:18,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:22:18,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664375494] [2021-05-06 02:22:18,647 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 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 [2021-05-06 02:22:18,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:22:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:22:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:22:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:22:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 02:22:19,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:22:19,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131889003] [2021-05-06 02:22:19,487 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:22:19,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664375494] [2021-05-06 02:22:19,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664375494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:22:19,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:22:19,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:22:19,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033512780] [2021-05-06 02:22:19,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:22:19,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:22:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:22:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:22:19,488 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:22:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:22:20,483 INFO L93 Difference]: Finished difference Result 469 states and 567 transitions. [2021-05-06 02:22:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:22:20,483 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), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:22:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:22:20,485 INFO L225 Difference]: With dead ends: 469 [2021-05-06 02:22:20,486 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 02:22:20,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:22:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 02:22:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 02:22:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 02:22:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 02:22:20,526 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 02:22:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:22:20,526 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 02:22:20,526 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), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:22:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 02:22:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:22:20,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:22:20,528 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:22:20,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:22:20,737 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:22:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:22:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 13 times [2021-05-06 02:22:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:22:20,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103494511] [2021-05-06 02:22:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:22:20,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:22:20,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105751239] [2021-05-06 02:22:20,747 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 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 [2021-05-06 02:22:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:22:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:22:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:22:20,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:20,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:20,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:20,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 02:22:21,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:22:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103494511] [2021-05-06 02:22:21,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:22:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105751239] [2021-05-06 02:22:21,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105751239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:22:21,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:22:21,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:22:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310577526] [2021-05-06 02:22:21,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:22:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:22:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:22:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:22:21,174 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:22:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:22:21,574 INFO L93 Difference]: Finished difference Result 472 states and 565 transitions. [2021-05-06 02:22:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:22:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:22:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:22:21,576 INFO L225 Difference]: With dead ends: 472 [2021-05-06 02:22:21,576 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 02:22:21,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:22:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 02:22:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 02:22:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:22:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 02:22:21,616 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 02:22:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:22:21,617 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 02:22:21,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:22:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 02:22:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:22:21,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:22:21,618 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:22:21,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:22:21,833 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:22:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:22:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 14 times [2021-05-06 02:22:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:22:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697570986] [2021-05-06 02:22:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:22:21,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:22:21,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551685529] [2021-05-06 02:22:21,840 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 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 [2021-05-06 02:22:21,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:22:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:22:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:22:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:22:22,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:22:22,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:22:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697570986] [2021-05-06 02:22:22,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:22:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551685529] [2021-05-06 02:22:22,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551685529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:22:22,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:22:22,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:22:22,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554214807] [2021-05-06 02:22:22,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:22:22,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:22:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:22:22,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:22:22,260 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:22:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:22:22,829 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-05-06 02:22:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:22:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:22:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:22:22,832 INFO L225 Difference]: With dead ends: 497 [2021-05-06 02:22:22,833 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 02:22:22,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:22:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 02:22:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 02:22:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 02:22:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 02:22:22,875 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 02:22:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:22:22,875 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 02:22:22,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:22:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 02:22:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:22:22,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:22:22,876 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:22:23,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:22:23,093 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:22:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:22:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 15 times [2021-05-06 02:22:23,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:22:23,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851473153] [2021-05-06 02:22:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:22:23,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:22:23,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902942853] [2021-05-06 02:22:23,099 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 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 [2021-05-06 02:22:23,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:22:23,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:22:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:22:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:22:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:23,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:24,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:41,851 WARN L205 SmtUtils]: Spent 11.51 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 02:22:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:41,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:22:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 90 proven. 56 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-05-06 02:22:42,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:22:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851473153] [2021-05-06 02:22:42,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:22:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902942853] [2021-05-06 02:22:42,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902942853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:22:42,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:22:42,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:22:42,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290577067] [2021-05-06 02:22:42,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:22:42,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:22:42,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:22:42,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:22:42,021 INFO L87 Difference]: Start difference. First operand 460 states and 541 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:23:08,034 WARN L205 SmtUtils]: Spent 23.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-06 02:24:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:26,868 INFO L93 Difference]: Finished difference Result 569 states and 704 transitions. [2021-05-06 02:24:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:24:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 104 [2021-05-06 02:24:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:26,872 INFO L225 Difference]: With dead ends: 569 [2021-05-06 02:24:26,872 INFO L226 Difference]: Without dead ends: 563 [2021-05-06 02:24:26,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 42407.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:24:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-06 02:24:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-05-06 02:24:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 331 states have (on average 1.1570996978851964) internal successors, (383), 341 states have internal predecessors, (383), 118 states have call successors, (118), 63 states have call predecessors, (118), 62 states have return successors, (114), 107 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 02:24:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 615 transitions. [2021-05-06 02:24:26,926 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 615 transitions. Word has length 104 [2021-05-06 02:24:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:26,927 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 615 transitions. [2021-05-06 02:24:26,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:24:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 615 transitions. [2021-05-06 02:24:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:26,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:26,928 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:27,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:24:27,136 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 16 times [2021-05-06 02:24:27,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:27,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458280577] [2021-05-06 02:24:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:27,151 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:27,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546719134] [2021-05-06 02:24:27,151 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 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 [2021-05-06 02:24:27,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:24:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:24:27,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:27,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:24:28,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458280577] [2021-05-06 02:24:28,019 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546719134] [2021-05-06 02:24:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546719134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:28,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:28,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:24:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457713841] [2021-05-06 02:24:28,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:24:28,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:24:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:28,021 INFO L87 Difference]: Start difference. First operand 512 states and 615 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:24:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:29,199 INFO L93 Difference]: Finished difference Result 541 states and 656 transitions. [2021-05-06 02:24:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:24:29,200 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), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:24:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:29,202 INFO L225 Difference]: With dead ends: 541 [2021-05-06 02:24:29,203 INFO L226 Difference]: Without dead ends: 539 [2021-05-06 02:24:29,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:24:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-06 02:24:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 505. [2021-05-06 02:24:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 326 states have (on average 1.156441717791411) internal successors, (377), 337 states have internal predecessors, (377), 117 states have call successors, (117), 62 states have call predecessors, (117), 61 states have return successors, (113), 105 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 02:24:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 607 transitions. [2021-05-06 02:24:29,256 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 607 transitions. Word has length 104 [2021-05-06 02:24:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:29,256 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 607 transitions. [2021-05-06 02:24:29,256 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), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:24:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 607 transitions. [2021-05-06 02:24:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:24:29,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:29,257 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:29,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 02:24:29,473 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 17 times [2021-05-06 02:24:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:29,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080585942] [2021-05-06 02:24:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:29,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733069334] [2021-05-06 02:24:29,479 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 [2021-05-06 02:24:29,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 02:24:29,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:29,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:24:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:30,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:30,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:31,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:18,161 WARN L159 QuantifierPusher]: Ignoring assumption.