/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/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:31,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:31,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:31,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:31,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:31,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:31,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:31,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:31,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:31,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:31,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:31,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:31,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:31,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:31,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:31,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:31,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:31,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:31,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:31,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:31,106 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 04:44:31,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:31,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:31,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:31,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:31,136 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:31,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:31,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:31,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:31,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:31,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:31,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:31,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:31,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:31,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:31,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:31,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:31,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:31,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:31,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:31,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:31,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:31,389 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:31,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-06 04:44:31,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190a6b252/3ea18bfcabc94c499242a675c6b4174c/FLAG62bda55a6 [2021-05-06 04:44:31,877 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:31,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-06 04:44:31,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190a6b252/3ea18bfcabc94c499242a675c6b4174c/FLAG62bda55a6 [2021-05-06 04:44:32,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/190a6b252/3ea18bfcabc94c499242a675c6b4174c [2021-05-06 04:44:32,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:32,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:32,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:32,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:32,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:32,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbcc3bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32, skipping insertion in model container [2021-05-06 04:44:32,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:32,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:32,352 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/ps4-ll_unwindbound50.c[458,471] [2021-05-06 04:44:32,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:32,366 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:32,374 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/ps4-ll_unwindbound50.c[458,471] [2021-05-06 04:44:32,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:32,386 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:32,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32 WrapperNode [2021-05-06 04:44:32,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:32,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:32,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:32,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:32,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (1/1) ... [2021-05-06 04:44:32,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:32,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:32,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:32,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:32,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (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 04:44:32,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:32,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:32,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:32,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:32,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:32,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:32,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:32,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:32,688 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:32,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:32 BoogieIcfgContainer [2021-05-06 04:44:32,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:32,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:32,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:32,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:32,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:32" (1/3) ... [2021-05-06 04:44:32,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:32, skipping insertion in model container [2021-05-06 04:44:32,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:32" (2/3) ... [2021-05-06 04:44:32,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:32, skipping insertion in model container [2021-05-06 04:44:32,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:32" (3/3) ... [2021-05-06 04:44:32,694 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2021-05-06 04:44:32,697 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:32,699 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:32,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:32,720 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:32,720 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:32,720 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:32,720 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:32,721 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:32,721 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:32,721 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:32,721 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:32,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,732 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,732 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:32,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65310814] [2021-05-06 04:44:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:32,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:32,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:32,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65310814] [2021-05-06 04:44:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65310814] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:32,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96160644] [2021-05-06 04:44:32,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:32,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:32,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:32,871 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:32,922 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 04:44:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:32,927 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:32,928 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:32,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:32,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:32,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,952 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:32,952 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:32,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836471809] [2021-05-06 04:44:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576420203] [2021-05-06 04:44:32,967 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 04:44:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:33,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:33,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836471809] [2021-05-06 04:44:33,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576420203] [2021-05-06 04:44:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576420203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:33,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:33,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490834639] [2021-05-06 04:44:33,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:33,116 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,125 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,125 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:33,126 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:33,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:33,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,130 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:33,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:33,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,131 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:33,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:33,348 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:33,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:33,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155952202] [2021-05-06 04:44:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:33,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:33,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579383002] [2021-05-06 04:44:33,358 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 04:44:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:33,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:33,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155952202] [2021-05-06 04:44:33,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579383002] [2021-05-06 04:44:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579383002] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:33,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:33,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797815794] [2021-05-06 04:44:33,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:33,472 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,502 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,503 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:33,503 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:33,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:33,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:33,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,509 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:33,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:33,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,510 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:33,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:33,730 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:33,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:33,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790064453] [2021-05-06 04:44:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:33,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:33,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374843268] [2021-05-06 04:44:33,745 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 04:44:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:33,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790064453] [2021-05-06 04:44:33,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374843268] [2021-05-06 04:44:33,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374843268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:33,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:33,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:44:33,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919840553] [2021-05-06 04:44:33,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:33,945 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:33,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,973 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 04:44:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:33,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:33,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,974 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:33,974 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:44:33,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:44:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 04:44:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 04:44:33,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 04:44:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,979 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 04:44:33,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 04:44:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:33,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,979 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:34,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:34,196 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-06 04:44:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955075556] [2021-05-06 04:44:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759868788] [2021-05-06 04:44:34,204 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 04:44:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:34,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:34,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:34,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955075556] [2021-05-06 04:44:34,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:34,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759868788] [2021-05-06 04:44:34,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759868788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:34,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:34,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:34,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587832279] [2021-05-06 04:44:34,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:34,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:34,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:34,317 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:34,348 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:44:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:34,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:34,349 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:44:34,349 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:44:34,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:44:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 04:44:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 04:44:34,355 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 04:44:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:34,355 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 04:44:34,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 04:44:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 04:44:34,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:34,356 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:34,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:34,572 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-06 04:44:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:34,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896233772] [2021-05-06 04:44:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:34,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997801139] [2021-05-06 04:44:34,580 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 04:44:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:34,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896233772] [2021-05-06 04:44:34,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997801139] [2021-05-06 04:44:34,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997801139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:34,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:34,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252151662] [2021-05-06 04:44:34,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:34,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:34,786 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:34,856 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 04:44:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:34,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 04:44:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:34,857 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:34,857 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:44:34,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:44:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 04:44:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 04:44:34,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 04:44:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:34,861 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 04:44:34,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 04:44:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:34,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:34,862 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:35,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:44:35,078 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-06 04:44:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:35,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962236234] [2021-05-06 04:44:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:35,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:35,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743459346] [2021-05-06 04:44:35,086 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 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 04:44:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962236234] [2021-05-06 04:44:35,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743459346] [2021-05-06 04:44:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743459346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:35,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:35,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:35,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439977947] [2021-05-06 04:44:35,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:35,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:35,231 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:35,262 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:44:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:35,262 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), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:35,263 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:35,263 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:44:35,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:44:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:44:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 04:44:35,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 04:44:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:35,268 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 04:44:35,268 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), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 04:44:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:35,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:35,268 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:35,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:35,484 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:35,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:35,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-06 04:44:35,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:35,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954342335] [2021-05-06 04:44:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:35,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:35,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565416207] [2021-05-06 04:44:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:35,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:35,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:35,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954342335] [2021-05-06 04:44:35,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:35,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565416207] [2021-05-06 04:44:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565416207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:35,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:35,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:35,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937443484] [2021-05-06 04:44:35,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:35,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:35,631 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:35,712 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 04:44:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:35,713 INFO L225 Difference]: With dead ends: 46 [2021-05-06 04:44:35,713 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 04:44:35,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 04:44:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 04:44:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 04:44:35,718 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 04:44:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:35,719 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 04:44:35,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 04:44:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:44:35,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:35,719 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:35,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:35,936 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-06 04:44:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:35,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91879405] [2021-05-06 04:44:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:35,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:35,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733898766] [2021-05-06 04:44:35,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:35,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:35,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:35,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:44:36,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:36,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91879405] [2021-05-06 04:44:36,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:36,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733898766] [2021-05-06 04:44:36,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733898766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:36,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:36,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:36,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303126400] [2021-05-06 04:44:36,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:36,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:36,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:36,116 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:36,293 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-06 04:44:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 04:44:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:36,294 INFO L225 Difference]: With dead ends: 49 [2021-05-06 04:44:36,294 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 04:44:36,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 04:44:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 04:44:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:36,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 04:44:36,298 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 04:44:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:36,298 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 04:44:36,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 04:44:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:36,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:36,299 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:36,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:36,500 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-06 04:44:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:36,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474224211] [2021-05-06 04:44:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:36,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:36,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762748921] [2021-05-06 04:44:36,506 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 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 04:44:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:36,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474224211] [2021-05-06 04:44:36,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:36,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762748921] [2021-05-06 04:44:36,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762748921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:36,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:36,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:36,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933626315] [2021-05-06 04:44:36,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:36,675 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:36,722 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:44:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-06 04:44:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:36,722 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:36,723 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:36,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:36,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 04:44:36,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 04:44:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:36,726 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 04:44:36,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 04:44:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:36,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:36,727 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:36,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:36,937 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-06 04:44:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:36,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993402205] [2021-05-06 04:44:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:36,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:36,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147628554] [2021-05-06 04:44:36,943 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 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 04:44:37,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:37,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:37,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 04:44:37,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:37,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993402205] [2021-05-06 04:44:37,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:37,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147628554] [2021-05-06 04:44:37,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147628554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:37,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:37,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:37,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707618478] [2021-05-06 04:44:37,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:37,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:37,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:37,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:37,087 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:37,121 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 04:44:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 04:44:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:37,121 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:37,121 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:37,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 04:44:37,126 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 04:44:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:37,126 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 04:44:37,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 04:44:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 04:44:37,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:37,127 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:37,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:37,331 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:37,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-06 04:44:37,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:37,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281272138] [2021-05-06 04:44:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:37,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161951342] [2021-05-06 04:44:37,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:37,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:37,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:44:37,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:37,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281272138] [2021-05-06 04:44:37,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:37,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161951342] [2021-05-06 04:44:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161951342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:37,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:37,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518742579] [2021-05-06 04:44:37,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:37,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:37,541 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:37,601 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-06 04:44:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-06 04:44:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:37,602 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:37,602 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:44:37,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:44:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:44:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 04:44:37,627 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 04:44:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:37,627 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 04:44:37,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 04:44:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:37,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:37,628 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:37,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:44:37,844 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-06 04:44:37,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:37,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403340207] [2021-05-06 04:44:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:37,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571956042] [2021-05-06 04:44:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:37,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:37,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:44:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:37,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:37,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403340207] [2021-05-06 04:44:37,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:37,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571956042] [2021-05-06 04:44:37,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571956042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:37,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:37,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:37,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304674862] [2021-05-06 04:44:37,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:37,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:37,973 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:38,021 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-06 04:44:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-06 04:44:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:38,022 INFO L225 Difference]: With dead ends: 58 [2021-05-06 04:44:38,022 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 04:44:38,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 04:44:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 04:44:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 04:44:38,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 04:44:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:38,026 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 04:44:38,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 04:44:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:44:38,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:38,027 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:38,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:38,243 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-06 04:44:38,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:38,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119507763] [2021-05-06 04:44:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:38,248 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:38,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200374168] [2021-05-06 04:44:38,248 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 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 04:44:38,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:38,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:38,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:44:38,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:38,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119507763] [2021-05-06 04:44:38,515 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:38,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200374168] [2021-05-06 04:44:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200374168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:38,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198560968] [2021-05-06 04:44:38,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:38,516 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:38,589 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-06 04:44:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-06 04:44:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:38,590 INFO L225 Difference]: With dead ends: 60 [2021-05-06 04:44:38,590 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:44:38,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:44:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 04:44:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 04:44:38,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 04:44:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:38,595 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 04:44:38,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 04:44:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 04:44:38,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:38,595 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:38,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 04:44:38,800 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-06 04:44:38,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:38,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813304959] [2021-05-06 04:44:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:38,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617201064] [2021-05-06 04:44:38,805 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 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 04:44:38,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:44:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:38,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:38,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:38,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813304959] [2021-05-06 04:44:38,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:38,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617201064] [2021-05-06 04:44:38,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617201064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:38,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:38,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:38,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924788042] [2021-05-06 04:44:38,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:38,967 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:39,025 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-06 04:44:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-06 04:44:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:39,026 INFO L225 Difference]: With dead ends: 66 [2021-05-06 04:44:39,026 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 04:44:39,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 04:44:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 04:44:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 04:44:39,030 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-06 04:44:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:39,030 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 04:44:39,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 04:44:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:44:39,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:39,031 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:39,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:39,247 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-06 04:44:39,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:39,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013358285] [2021-05-06 04:44:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:39,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:39,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240627148] [2021-05-06 04:44:39,251 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 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 04:44:39,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:39,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:44:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:39,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 04:44:39,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013358285] [2021-05-06 04:44:39,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240627148] [2021-05-06 04:44:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240627148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:39,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:39,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:39,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057330051] [2021-05-06 04:44:39,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:39,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:39,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:39,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:39,522 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:39,616 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-06 04:44:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:44:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-06 04:44:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:39,617 INFO L225 Difference]: With dead ends: 68 [2021-05-06 04:44:39,617 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 04:44:39,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 04:44:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 04:44:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 04:44:39,621 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-06 04:44:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:39,621 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 04:44:39,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 04:44:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 04:44:39,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:39,622 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:39,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:39,836 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-06 04:44:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:39,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690666597] [2021-05-06 04:44:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:39,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:39,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877494972] [2021-05-06 04:44:39,865 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 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 04:44:39,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:39,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:39,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:44:39,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:39,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:40,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:40,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690666597] [2021-05-06 04:44:40,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:40,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877494972] [2021-05-06 04:44:40,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877494972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:40,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:40,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830380813] [2021-05-06 04:44:40,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:40,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:40,085 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:40,161 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-06 04:44:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:40,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-06 04:44:40,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:40,162 INFO L225 Difference]: With dead ends: 74 [2021-05-06 04:44:40,162 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 04:44:40,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 04:44:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 04:44:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 04:44:40,167 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-06 04:44:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:40,167 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 04:44:40,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 04:44:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 04:44:40,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,168 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:40,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:40,373 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-06 04:44:40,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:40,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562880758] [2021-05-06 04:44:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:40,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:40,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315687581] [2021-05-06 04:44:40,378 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 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 04:44:40,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 04:44:40,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562880758] [2021-05-06 04:44:40,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315687581] [2021-05-06 04:44:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315687581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:40,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:40,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:40,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995020727] [2021-05-06 04:44:40,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:40,739 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:40,855 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-06 04:44:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-06 04:44:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:40,856 INFO L225 Difference]: With dead ends: 76 [2021-05-06 04:44:40,856 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 04:44:40,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 04:44:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 04:44:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 04:44:40,860 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-06 04:44:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:40,861 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 04:44:40,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 04:44:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:44:40,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,861 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:41,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 04:44:41,078 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-06 04:44:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852358426] [2021-05-06 04:44:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042995183] [2021-05-06 04:44:41,083 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 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 04:44:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:41,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852358426] [2021-05-06 04:44:41,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042995183] [2021-05-06 04:44:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042995183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:41,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:41,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708272393] [2021-05-06 04:44:41,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:41,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:41,294 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,394 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-06 04:44:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-06 04:44:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,395 INFO L225 Difference]: With dead ends: 82 [2021-05-06 04:44:41,395 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 04:44:41,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 04:44:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 04:44:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 04:44:41,399 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-06 04:44:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,399 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 04:44:41,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 04:44:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 04:44:41,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,400 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:41,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 04:44:41,616 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-06 04:44:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255906574] [2021-05-06 04:44:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125565838] [2021-05-06 04:44:41,621 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 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 04:44:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:41,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 04:44:42,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255906574] [2021-05-06 04:44:42,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125565838] [2021-05-06 04:44:42,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125565838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:42,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848094831] [2021-05-06 04:44:42,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:42,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:42,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:42,059 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:42,185 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-06 04:44:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:44:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-06 04:44:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:42,186 INFO L225 Difference]: With dead ends: 84 [2021-05-06 04:44:42,186 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 04:44:42,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 04:44:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 04:44:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 04:44:42,190 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-06 04:44:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:42,191 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 04:44:42,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 04:44:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 04:44:42,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:42,191 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:44:42,396 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-06 04:44:42,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273853234] [2021-05-06 04:44:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247526929] [2021-05-06 04:44:42,400 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 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 04:44:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:42,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 04:44:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:42,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273853234] [2021-05-06 04:44:42,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247526929] [2021-05-06 04:44:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247526929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:42,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37446894] [2021-05-06 04:44:42,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:42,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:42,586 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:42,694 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-06 04:44:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-06 04:44:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:42,694 INFO L225 Difference]: With dead ends: 90 [2021-05-06 04:44:42,694 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 04:44:42,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 04:44:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 04:44:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 04:44:42,699 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-06 04:44:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:42,699 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 04:44:42,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 04:44:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 04:44:42,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:42,700 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 04:44:42,916 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-06 04:44:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480764500] [2021-05-06 04:44:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461881936] [2021-05-06 04:44:42,924 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 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 04:44:43,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:43,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:44:43,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:43,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 04:44:43,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:43,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480764500] [2021-05-06 04:44:43,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:43,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461881936] [2021-05-06 04:44:43,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461881936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:43,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:43,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:43,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644775967] [2021-05-06 04:44:43,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:43,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:43,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:43,603 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:43,750 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-06 04:44:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-06 04:44:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:43,751 INFO L225 Difference]: With dead ends: 92 [2021-05-06 04:44:43,751 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 04:44:43,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 04:44:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 04:44:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 04:44:43,755 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-06 04:44:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:43,756 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 04:44:43,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 04:44:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 04:44:43,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,756 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:43,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 04:44:43,957 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-06 04:44:43,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128371249] [2021-05-06 04:44:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:43,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895774960] [2021-05-06 04:44:43,961 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 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 04:44:44,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:44,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128371249] [2021-05-06 04:44:44,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895774960] [2021-05-06 04:44:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895774960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:44,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:44,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:44,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044702180] [2021-05-06 04:44:44,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:44,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:44,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:44,272 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,375 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-06 04:44:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:44:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-06 04:44:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,377 INFO L225 Difference]: With dead ends: 98 [2021-05-06 04:44:44,377 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 04:44:44,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 04:44:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 04:44:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 04:44:44,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-06 04:44:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,381 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 04:44:44,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 04:44:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 04:44:44,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,382 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:44,586 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-06 04:44:44,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764950650] [2021-05-06 04:44:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485929189] [2021-05-06 04:44:44,591 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 04:44:45,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:45,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 04:44:45,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764950650] [2021-05-06 04:44:45,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485929189] [2021-05-06 04:44:45,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485929189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:45,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651285091] [2021-05-06 04:44:45,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:45,285 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,462 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-06 04:44:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:44:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-06 04:44:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,463 INFO L225 Difference]: With dead ends: 100 [2021-05-06 04:44:45,463 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 04:44:45,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 04:44:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 04:44:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 04:44:45,468 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-06 04:44:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,468 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 04:44:45,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 04:44:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 04:44:45,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,469 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:45,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 04:44:45,669 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-06 04:44:45,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468803860] [2021-05-06 04:44:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184366564] [2021-05-06 04:44:45,693 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 04:44:46,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 04:44:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:46,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468803860] [2021-05-06 04:44:46,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184366564] [2021-05-06 04:44:46,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184366564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:46,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214180408] [2021-05-06 04:44:46,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:46,322 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,440 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-06 04:44:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:44:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-06 04:44:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,441 INFO L225 Difference]: With dead ends: 106 [2021-05-06 04:44:46,441 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 04:44:46,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:44:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 04:44:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 04:44:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 04:44:46,446 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-06 04:44:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,446 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 04:44:46,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 04:44:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 04:44:46,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,447 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:46,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:46,652 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-06 04:44:46,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:46,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697928482] [2021-05-06 04:44:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:46,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:46,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216615735] [2021-05-06 04:44:46,656 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 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 04:44:47,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:47,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:47,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 04:44:47,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697928482] [2021-05-06 04:44:47,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216615735] [2021-05-06 04:44:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216615735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388437846] [2021-05-06 04:44:47,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:47,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:47,706 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:47,925 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-06 04:44:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-06 04:44:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:47,926 INFO L225 Difference]: With dead ends: 108 [2021-05-06 04:44:47,926 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 04:44:47,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 04:44:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 04:44:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-06 04:44:47,932 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-06 04:44:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:47,932 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-06 04:44:47,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-06 04:44:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:44:47,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:47,933 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:48,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 04:44:48,139 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-06 04:44:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676879452] [2021-05-06 04:44:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:48,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:48,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832637953] [2021-05-06 04:44:48,144 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 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 04:44:48,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:48,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:48,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 04:44:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:48,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:48,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676879452] [2021-05-06 04:44:48,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:48,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832637953] [2021-05-06 04:44:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832637953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515620216] [2021-05-06 04:44:48,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:48,720 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,853 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-06 04:44:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:44:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-06 04:44:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,854 INFO L225 Difference]: With dead ends: 114 [2021-05-06 04:44:48,854 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 04:44:48,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 04:44:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 04:44:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-06 04:44:48,859 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-06 04:44:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,859 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-06 04:44:48,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-06 04:44:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 04:44:48,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,860 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:49,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 04:44:49,066 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-06 04:44:49,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:49,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247617554] [2021-05-06 04:44:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:49,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:49,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827495895] [2021-05-06 04:44:49,074 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 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 04:44:49,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:49,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 04:44:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:49,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 04:44:49,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:49,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247617554] [2021-05-06 04:44:49,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:49,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827495895] [2021-05-06 04:44:49,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827495895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:49,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:49,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655661675] [2021-05-06 04:44:49,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:49,743 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:49,975 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-06 04:44:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 04:44:49,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-06 04:44:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:49,976 INFO L225 Difference]: With dead ends: 116 [2021-05-06 04:44:49,976 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 04:44:49,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 04:44:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 04:44:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-06 04:44:49,981 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-06 04:44:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:49,981 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-06 04:44:49,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-06 04:44:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 04:44:49,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:49,982 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:50,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 04:44:50,187 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:50,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-06 04:44:50,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:50,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666627523] [2021-05-06 04:44:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:50,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:50,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867131743] [2021-05-06 04:44:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:50,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:44:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:50,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666627523] [2021-05-06 04:44:50,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:50,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867131743] [2021-05-06 04:44:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867131743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29831805] [2021-05-06 04:44:50,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:50,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:50,585 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:50,838 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-06 04:44:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:44:50,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-06 04:44:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:50,839 INFO L225 Difference]: With dead ends: 122 [2021-05-06 04:44:50,839 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 04:44:50,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:44:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 04:44:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 04:44:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-06 04:44:50,845 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-06 04:44:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:50,845 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-06 04:44:50,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-06 04:44:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 04:44:50,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:50,845 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:51,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 04:44:51,046 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-06 04:44:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955438422] [2021-05-06 04:44:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:51,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:51,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796988626] [2021-05-06 04:44:51,050 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 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 04:44:51,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:51,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 04:44:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 04:44:51,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:51,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955438422] [2021-05-06 04:44:51,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:51,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796988626] [2021-05-06 04:44:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796988626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:51,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:51,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965171284] [2021-05-06 04:44:51,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:51,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:51,951 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:52,252 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-06 04:44:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:52,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-06 04:44:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:52,253 INFO L225 Difference]: With dead ends: 124 [2021-05-06 04:44:52,253 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 04:44:52,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 04:44:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 04:44:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-06 04:44:52,258 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-06 04:44:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:52,258 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-06 04:44:52,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-06 04:44:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 04:44:52,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:52,259 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:52,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-06 04:44:52,466 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-06 04:44:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:52,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573327813] [2021-05-06 04:44:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:52,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:52,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832745733] [2021-05-06 04:44:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:52,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 04:44:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:52,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:52,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573327813] [2021-05-06 04:44:52,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832745733] [2021-05-06 04:44:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832745733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:52,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:52,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:52,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816735903] [2021-05-06 04:44:52,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:52,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:52,798 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:53,004 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-06 04:44:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 04:44:53,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-06 04:44:53,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:53,005 INFO L225 Difference]: With dead ends: 130 [2021-05-06 04:44:53,005 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 04:44:53,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:44:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 04:44:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-06 04:44:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-06 04:44:53,010 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-06 04:44:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:53,010 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-06 04:44:53,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-06 04:44:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 04:44:53,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:53,011 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:53,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:53,211 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-06 04:44:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:53,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449979577] [2021-05-06 04:44:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:53,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:53,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634179640] [2021-05-06 04:44:53,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 04:44:53,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:54,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 04:44:54,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449979577] [2021-05-06 04:44:54,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634179640] [2021-05-06 04:44:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634179640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:54,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:54,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:54,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204916789] [2021-05-06 04:44:54,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:54,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:54,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:54,132 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:54,442 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-06 04:44:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 04:44:54,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-06 04:44:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:54,443 INFO L225 Difference]: With dead ends: 132 [2021-05-06 04:44:54,444 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 04:44:54,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:44:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 04:44:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 04:44:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-06 04:44:54,449 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-06 04:44:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:54,449 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-06 04:44:54,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-06 04:44:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 04:44:54,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:54,450 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:54,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 04:44:54,655 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-06 04:44:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946223093] [2021-05-06 04:44:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:54,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:54,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926512595] [2021-05-06 04:44:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:54,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:54,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:54,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:44:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:55,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:55,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946223093] [2021-05-06 04:44:55,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:55,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926512595] [2021-05-06 04:44:55,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926512595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:55,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:55,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:55,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163031223] [2021-05-06 04:44:55,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:55,049 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:55,257 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-06 04:44:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 04:44:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-06 04:44:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:55,259 INFO L225 Difference]: With dead ends: 138 [2021-05-06 04:44:55,259 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 04:44:55,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:44:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 04:44:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-06 04:44:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-06 04:44:55,266 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-06 04:44:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:55,267 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-06 04:44:55,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-06 04:44:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 04:44:55,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:55,267 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:55,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 04:44:55,481 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-06 04:44:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:55,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296254408] [2021-05-06 04:44:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:55,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:55,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894499187] [2021-05-06 04:44:55,485 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 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 04:44:56,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:56,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 04:44:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:56,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 04:44:56,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296254408] [2021-05-06 04:44:56,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894499187] [2021-05-06 04:44:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894499187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:56,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:56,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:44:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861518539] [2021-05-06 04:44:56,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:44:56,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:44:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:56,468 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:56,784 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-06 04:44:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:44:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-06 04:44:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:56,785 INFO L225 Difference]: With dead ends: 140 [2021-05-06 04:44:56,785 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 04:44:56,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:44:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 04:44:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 04:44:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-06 04:44:56,791 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-06 04:44:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:56,791 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-06 04:44:56,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-06 04:44:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 04:44:56,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:56,792 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:56,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 04:44:56,992 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-06 04:44:56,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:56,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138105357] [2021-05-06 04:44:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:56,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:56,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006013874] [2021-05-06 04:44:56,996 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:57,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 04:44:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:57,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:57,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138105357] [2021-05-06 04:44:57,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:57,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006013874] [2021-05-06 04:44:57,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006013874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:57,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:57,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:44:57,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613053591] [2021-05-06 04:44:57,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:44:57,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:44:57,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:57,920 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:58,140 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-06 04:44:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 04:44:58,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-06 04:44:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:58,141 INFO L225 Difference]: With dead ends: 146 [2021-05-06 04:44:58,141 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 04:44:58,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:44:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 04:44:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 04:44:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-06 04:44:58,146 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-06 04:44:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:58,146 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-06 04:44:58,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-06 04:44:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 04:44:58,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:58,147 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:58,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 04:44:58,353 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-06 04:44:58,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:58,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599599330] [2021-05-06 04:44:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:58,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680761337] [2021-05-06 04:44:58,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:59,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:44:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 04:44:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 76 proven. 481 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 04:44:59,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:59,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599599330] [2021-05-06 04:44:59,510 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:59,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680761337] [2021-05-06 04:44:59,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680761337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:59,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:59,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:44:59,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540660922] [2021-05-06 04:44:59,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:44:59,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:59,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:44:59,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:44:59,511 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:59,961 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-06 04:44:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 04:44:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-06 04:44:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:59,962 INFO L225 Difference]: With dead ends: 148 [2021-05-06 04:44:59,962 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 04:44:59,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:44:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 04:44:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-06 04:44:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:44:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-06 04:44:59,968 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-06 04:44:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:59,968 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-06 04:44:59,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:44:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-06 04:44:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 04:44:59,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:59,969 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:00,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 04:45:00,175 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-06 04:45:00,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:00,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34510225] [2021-05-06 04:45:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:00,180 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:00,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675779976] [2021-05-06 04:45:00,180 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:01,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 04:45:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:01,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:45:01,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34510225] [2021-05-06 04:45:01,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675779976] [2021-05-06 04:45:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675779976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:01,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:01,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:45:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700313219] [2021-05-06 04:45:01,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:45:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:45:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:45:01,380 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:45:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:01,602 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-06 04:45:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 04:45:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-06 04:45:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:01,603 INFO L225 Difference]: With dead ends: 154 [2021-05-06 04:45:01,603 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 04:45:01,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:45:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 04:45:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-06 04:45:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:45:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-06 04:45:01,608 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-06 04:45:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-06 04:45:01,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:45:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-06 04:45:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 04:45:01,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:01,609 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:01,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-06 04:45:01,814 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-06 04:45:01,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:01,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559923678] [2021-05-06 04:45:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:01,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:01,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57307860] [2021-05-06 04:45:01,819 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:02,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 04:45:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:03,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 04:45:03,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:03,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559923678] [2021-05-06 04:45:03,129 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:03,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57307860] [2021-05-06 04:45:03,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57307860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:03,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:03,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:45:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117607886] [2021-05-06 04:45:03,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:45:03,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:45:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:45:03,131 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:45:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:03,661 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-06 04:45:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:45:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-06 04:45:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:03,662 INFO L225 Difference]: With dead ends: 156 [2021-05-06 04:45:03,662 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 04:45:03,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:45:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 04:45:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 04:45:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 04:45:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-06 04:45:03,670 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-06 04:45:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:03,670 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-06 04:45:03,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:45:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-06 04:45:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 04:45:03,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:03,671 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:03,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 04:45:03,876 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-06 04:45:03,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:03,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406463559] [2021-05-06 04:45:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:03,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:03,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878140143] [2021-05-06 04:45:03,881 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true