/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/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:08:13,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:08:13,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:08:13,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:08:13,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:08:13,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:08:13,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:08:13,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:08:13,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:08:13,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:08:13,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:08:13,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:08:13,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:08:13,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:08:13,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:08:13,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:08:13,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:08:13,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:08:13,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:08:13,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:08:13,737 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 03:08:13,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:08:13,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:08:13,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:08:13,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:08:13,786 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:08:13,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:08:13,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:08:13,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:08:13,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:08:13,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:08:13,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:08:13,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:08:13,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:08:13,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:08:13,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:08:13,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:08:13,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:08:13,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:08:13,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:08:13,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:08:13,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:08:13,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:08:13,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:08:13,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:08:13,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:08:13,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:08:13,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:08:13,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:08:13,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:08:14,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:08:14,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:08:14,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:08:14,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:08:14,063 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:08:14,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-06 03:08:14,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7774bab1/f99c831965b140269b90d27d6dc99c7e/FLAG05521b763 [2021-05-06 03:08:14,437 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:08:14,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-06 03:08:14,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7774bab1/f99c831965b140269b90d27d6dc99c7e/FLAG05521b763 [2021-05-06 03:08:14,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7774bab1/f99c831965b140269b90d27d6dc99c7e [2021-05-06 03:08:14,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:08:14,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:08:14,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:08:14,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:08:14,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:08:14,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:08:14" (1/1) ... [2021-05-06 03:08:14,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60bb6324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:14, skipping insertion in model container [2021-05-06 03:08:14,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:08:14" (1/1) ... [2021-05-06 03:08:14,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:08:14,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:08:15,028 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/hard-ll_unwindbound20.c[546,559] [2021-05-06 03:08:15,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:08:15,061 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:08:15,073 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/hard-ll_unwindbound20.c[546,559] [2021-05-06 03:08:15,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:08:15,104 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:08:15,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15 WrapperNode [2021-05-06 03:08:15,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:08:15,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:08:15,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:08:15,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:08:15,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (1/1) ... [2021-05-06 03:08:15,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:08:15,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:08:15,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:08:15,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:08:15,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (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 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:08:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:08:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:08:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:08:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:08:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:08:15,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:08:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:08:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:08:15,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:08:15,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:08:15,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:08:15,559 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:08:15,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:08:15 BoogieIcfgContainer [2021-05-06 03:08:15,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:08:15,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:08:15,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:08:15,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:08:15,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:08:14" (1/3) ... [2021-05-06 03:08:15,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cff764c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:08:15, skipping insertion in model container [2021-05-06 03:08:15,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:08:15" (2/3) ... [2021-05-06 03:08:15,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cff764c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:08:15, skipping insertion in model container [2021-05-06 03:08:15,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:08:15" (3/3) ... [2021-05-06 03:08:15,567 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2021-05-06 03:08:15,571 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:08:15,574 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:08:15,588 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:08:15,607 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:08:15,607 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:08:15,607 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:08:15,607 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:08:15,607 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:08:15,607 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:08:15,608 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:08:15,608 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:08:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:08:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:08:15,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:15,629 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:15,630 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:08:15,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:15,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185969646] [2021-05-06 03:08:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:08:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:15,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:08:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:15,927 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 03:08:15,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185969646] [2021-05-06 03:08:15,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185969646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:15,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:15,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:08:15,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729791540] [2021-05-06 03:08:15,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:08:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:08:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:08:15,947 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:08:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:16,107 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:08:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:08:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:08:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:16,114 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:08:16,114 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:08:16,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:08:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:08:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:08:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:08:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:08:16,162 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:08:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:16,162 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:08:16,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:08:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:08:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:08:16,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:16,164 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:16,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:08:16,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:08:16,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:16,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954029118] [2021-05-06 03:08:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:16,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:08:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:08:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:16,309 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 03:08:16,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:16,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954029118] [2021-05-06 03:08:16,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954029118] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:16,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:16,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:08:16,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906027159] [2021-05-06 03:08:16,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:08:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:08:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:16,313 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:08:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:16,586 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:08:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:08:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:16,588 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:08:16,588 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:08:16,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:08:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:08:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:08:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:08:16,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:08:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:16,598 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:08:16,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:08:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:08:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:08:16,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:16,599 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:16,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:08:16,600 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:08:16,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:16,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530636758] [2021-05-06 03:08:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:16,612 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:16,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435346788] [2021-05-06 03:08:16,612 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 03:08:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:16,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:08:16,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:16,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:16,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:16,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:16,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:16,851 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 03:08:16,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:16,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530636758] [2021-05-06 03:08:16,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:16,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435346788] [2021-05-06 03:08:16,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435346788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:16,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:16,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:08:16,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549468694] [2021-05-06 03:08:16,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:08:16,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:16,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:08:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:08:16,854 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:08:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:16,873 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:08:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:08:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:08:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:16,877 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:08:16,877 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:08:16,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:08:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:08:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:08:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:08:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:08:16,885 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:08:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:16,885 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:08:16,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:08:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:08:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:08:16,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:16,886 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:17,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:08:17,112 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:08:17,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:17,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109545731] [2021-05-06 03:08:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:17,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:08:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:08:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:17,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:08:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:08:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109545731] [2021-05-06 03:08:17,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109545731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:17,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:17,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:08:17,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214131401] [2021-05-06 03:08:17,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:08:17,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:08:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:17,226 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:08:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:17,482 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:08:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:17,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:08:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:17,485 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:08:17,485 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:08:17,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:08:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:08:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:08:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:08:17,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:08:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:17,506 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:08:17,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:08:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:08:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:08:17,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:17,507 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:17,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:08:17,507 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:08:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:17,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574333894] [2021-05-06 03:08:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:17,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:17,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062928402] [2021-05-06 03:08:17,528 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 03:08:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:08:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:17,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:08:17,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:17,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574333894] [2021-05-06 03:08:17,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:17,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062928402] [2021-05-06 03:08:17,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062928402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:17,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:17,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:08:17,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130721970] [2021-05-06 03:08:17,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:08:17,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:08:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:08:17,703 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:08:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:17,780 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-06 03:08:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:08:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:08:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:17,783 INFO L225 Difference]: With dead ends: 71 [2021-05-06 03:08:17,783 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:08:17,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:08:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:08:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:08:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 03:08:17,798 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 03:08:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:17,799 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 03:08:17,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:08:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 03:08:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:08:17,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:17,800 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:18,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:18,001 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:18,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:08:18,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:18,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605942925] [2021-05-06 03:08:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:18,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:18,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146531150] [2021-05-06 03:08:18,011 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 03:08:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:08:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:18,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:08:18,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605942925] [2021-05-06 03:08:18,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146531150] [2021-05-06 03:08:18,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146531150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:18,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:08:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132173965] [2021-05-06 03:08:18,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:08:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:08:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:08:18,163 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:08:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:18,195 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 03:08:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:08:18,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 03:08:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:18,196 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:08:18,196 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:08:18,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:08:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:08:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 03:08:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:08:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 03:08:18,205 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 03:08:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:18,206 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 03:08:18,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:08:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 03:08:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:08:18,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:18,207 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:18,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:18,423 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-06 03:08:18,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:18,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844248417] [2021-05-06 03:08:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:18,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:18,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677001273] [2021-05-06 03:08:18,448 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 03:08:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:08:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:08:18,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844248417] [2021-05-06 03:08:18,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677001273] [2021-05-06 03:08:18,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677001273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:18,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:18,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:08:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59952689] [2021-05-06 03:08:18,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:08:18,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:08:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:18,727 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:08:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:18,821 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-06 03:08:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:08:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:08:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:18,822 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:08:18,823 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:08:18,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:08:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:08:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:08:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:08:18,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 03:08:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:18,844 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:08:18,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:08:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:08:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:08:18,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:18,851 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:19,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:19,052 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-06 03:08:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:19,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489939765] [2021-05-06 03:08:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:19,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:19,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724303033] [2021-05-06 03:08:19,060 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 03:08:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:08:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:08:19,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:19,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489939765] [2021-05-06 03:08:19,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:19,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724303033] [2021-05-06 03:08:19,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724303033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:19,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:19,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:08:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847964971] [2021-05-06 03:08:19,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:08:19,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:08:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:08:19,206 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:08:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:19,249 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-06 03:08:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:08:19,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 03:08:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:19,250 INFO L225 Difference]: With dead ends: 74 [2021-05-06 03:08:19,250 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 03:08:19,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 03:08:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 03:08:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 03:08:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 03:08:19,273 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 03:08:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:19,275 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 03:08:19,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:08:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 03:08:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 03:08:19,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:19,276 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:19,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:19,481 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-06 03:08:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:19,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777803164] [2021-05-06 03:08:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:19,494 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:19,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627869097] [2021-05-06 03:08:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:08:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:19,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:08:19,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777803164] [2021-05-06 03:08:19,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627869097] [2021-05-06 03:08:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627869097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:19,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:19,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:08:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590106391] [2021-05-06 03:08:19,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:08:19,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:08:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:08:19,755 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:08:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:19,921 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2021-05-06 03:08:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:08:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 03:08:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:19,922 INFO L225 Difference]: With dead ends: 97 [2021-05-06 03:08:19,922 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 03:08:19,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:08:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 03:08:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 03:08:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:08:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 03:08:19,931 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 03:08:19,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:19,931 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 03:08:19,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:08:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 03:08:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:08:19,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:19,932 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:20,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:20,145 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-06 03:08:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877059921] [2021-05-06 03:08:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:20,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:20,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876560711] [2021-05-06 03:08:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:08:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:20,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 03:08:20,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:20,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877059921] [2021-05-06 03:08:20,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:20,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876560711] [2021-05-06 03:08:20,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876560711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:20,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:20,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:08:20,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606516784] [2021-05-06 03:08:20,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:08:20,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:20,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:08:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:20,335 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:08:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:20,378 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-06 03:08:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:08:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 03:08:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:20,381 INFO L225 Difference]: With dead ends: 101 [2021-05-06 03:08:20,381 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 03:08:20,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 03:08:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 03:08:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:08:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 03:08:20,389 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 03:08:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:20,389 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 03:08:20,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 03:08:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 03:08:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 03:08:20,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:20,390 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:20,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:08:20,605 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-06 03:08:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949650922] [2021-05-06 03:08:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:20,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:20,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345278792] [2021-05-06 03:08:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:08:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 03:08:20,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:20,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949650922] [2021-05-06 03:08:20,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:20,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345278792] [2021-05-06 03:08:20,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345278792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:20,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:20,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:08:20,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410252941] [2021-05-06 03:08:20,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:08:20,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:08:20,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:08:21,000 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:08:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:21,180 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2021-05-06 03:08:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 03:08:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:21,183 INFO L225 Difference]: With dead ends: 104 [2021-05-06 03:08:21,184 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 03:08:21,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 03:08:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 03:08:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:08:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 03:08:21,192 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 03:08:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:21,192 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 03:08:21,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:08:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 03:08:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 03:08:21,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:21,193 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:21,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:08:21,409 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-06 03:08:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:21,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403666046] [2021-05-06 03:08:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:21,423 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:21,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817654988] [2021-05-06 03:08:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:21,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 03:08:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:08:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:21,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 03:08:21,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403666046] [2021-05-06 03:08:21,568 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817654988] [2021-05-06 03:08:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817654988] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:08:21,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:08:21,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:08:21,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235092430] [2021-05-06 03:08:21,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:08:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:21,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:08:21,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:08:21,570 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:08:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:21,622 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-05-06 03:08:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:08:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 03:08:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:21,624 INFO L225 Difference]: With dead ends: 110 [2021-05-06 03:08:21,624 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 03:08:21,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 03:08:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 03:08:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:08:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 03:08:21,632 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 03:08:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:21,632 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 03:08:21,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:08:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 03:08:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:08:21,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:21,633 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:21,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:21,850 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-06 03:08:21,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:21,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148797067] [2021-05-06 03:08:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:21,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:21,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436343777] [2021-05-06 03:08:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:08:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:21,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:21,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 03:08:22,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:22,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148797067] [2021-05-06 03:08:22,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:22,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436343777] [2021-05-06 03:08:22,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436343777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:22,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:22,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:08:22,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393892733] [2021-05-06 03:08:22,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:08:22,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:08:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:08:22,055 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:08:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:22,127 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2021-05-06 03:08:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:22,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 03:08:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:22,130 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:08:22,130 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 03:08:22,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 03:08:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 03:08:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:08:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 03:08:22,142 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 03:08:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:22,143 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 03:08:22,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:08:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 03:08:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:08:22,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:22,144 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:22,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:22,367 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-06 03:08:22,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:22,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155228530] [2021-05-06 03:08:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:22,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:22,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105133643] [2021-05-06 03:08:22,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:08:22,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:08:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:08:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:22,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:08:22,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:22,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155228530] [2021-05-06 03:08:22,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:22,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105133643] [2021-05-06 03:08:22,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105133643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:22,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:22,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:08:22,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302217628] [2021-05-06 03:08:22,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:08:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:08:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:08:22,619 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:08:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:22,773 INFO L93 Difference]: Finished difference Result 178 states and 237 transitions. [2021-05-06 03:08:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:08:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 03:08:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:22,774 INFO L225 Difference]: With dead ends: 178 [2021-05-06 03:08:22,775 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 03:08:22,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 03:08:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 03:08:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:08:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 03:08:22,785 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 03:08:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:22,785 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 03:08:22,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:08:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 03:08:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:08:22,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:22,786 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:23,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:08:23,001 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-06 03:08:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941822335] [2021-05-06 03:08:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:23,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:23,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036167638] [2021-05-06 03:08:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:08:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:08:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 03:08:23,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:23,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941822335] [2021-05-06 03:08:23,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:23,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036167638] [2021-05-06 03:08:23,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036167638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:23,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:23,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:08:23,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823222596] [2021-05-06 03:08:23,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:08:23,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:08:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:08:23,188 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:08:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:23,261 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2021-05-06 03:08:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 03:08:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:23,278 INFO L225 Difference]: With dead ends: 169 [2021-05-06 03:08:23,279 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 03:08:23,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 03:08:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 03:08:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:08:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 03:08:23,288 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 03:08:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:23,288 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 03:08:23,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 03:08:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 03:08:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 03:08:23,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:23,289 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:23,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:08:23,505 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-06 03:08:23,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:23,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894857304] [2021-05-06 03:08:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:23,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:23,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570727776] [2021-05-06 03:08:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:08:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:23,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 03:08:23,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:23,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894857304] [2021-05-06 03:08:23,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:23,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570727776] [2021-05-06 03:08:23,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570727776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:23,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:23,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:08:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541450840] [2021-05-06 03:08:23,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:08:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:08:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:08:23,973 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:08:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:24,264 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2021-05-06 03:08:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:08:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 03:08:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:24,265 INFO L225 Difference]: With dead ends: 163 [2021-05-06 03:08:24,265 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:08:24,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:08:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:08:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 03:08:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:08:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 03:08:24,282 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 03:08:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:24,282 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 03:08:24,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:08:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 03:08:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:08:24,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:24,284 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:24,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:08:24,509 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-06 03:08:24,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:24,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859603762] [2021-05-06 03:08:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:24,515 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:24,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113199212] [2021-05-06 03:08:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:08:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:08:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 03:08:24,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859603762] [2021-05-06 03:08:24,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113199212] [2021-05-06 03:08:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113199212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:24,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:24,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:08:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473509373] [2021-05-06 03:08:24,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:08:24,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:08:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:08:24,739 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:08:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:24,852 INFO L93 Difference]: Finished difference Result 182 states and 217 transitions. [2021-05-06 03:08:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:08:24,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 79 [2021-05-06 03:08:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:24,853 INFO L225 Difference]: With dead ends: 182 [2021-05-06 03:08:24,853 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 03:08:24,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:08:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 03:08:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-05-06 03:08:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 98 states have internal predecessors, (111), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:08:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-05-06 03:08:24,864 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 79 [2021-05-06 03:08:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:24,864 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-05-06 03:08:24,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:08:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-05-06 03:08:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:08:24,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:24,865 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:25,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:25,081 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash 816704307, now seen corresponding path program 2 times [2021-05-06 03:08:25,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:25,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944158347] [2021-05-06 03:08:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:25,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:25,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201462381] [2021-05-06 03:08:25,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:08:25,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:08:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:25,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:08:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:25,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 03:08:25,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:25,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944158347] [2021-05-06 03:08:25,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:25,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201462381] [2021-05-06 03:08:25,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201462381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:25,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:25,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:08:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135331379] [2021-05-06 03:08:25,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:08:25,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:08:25,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:08:25,292 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:08:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:25,384 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2021-05-06 03:08:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:08:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 03:08:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:25,385 INFO L225 Difference]: With dead ends: 183 [2021-05-06 03:08:25,386 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 03:08:25,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 03:08:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-06 03:08:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:08:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-05-06 03:08:25,400 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 79 [2021-05-06 03:08:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:25,400 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-05-06 03:08:25,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 03:08:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-05-06 03:08:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 03:08:25,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:25,401 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:25,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:08:25,625 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1229238971, now seen corresponding path program 3 times [2021-05-06 03:08:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011728533] [2021-05-06 03:08:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:25,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104513315] [2021-05-06 03:08:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:25,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:08:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:08:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 03:08:25,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:25,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011728533] [2021-05-06 03:08:25,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:25,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104513315] [2021-05-06 03:08:25,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104513315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:25,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:25,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:08:25,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529230751] [2021-05-06 03:08:25,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:08:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:08:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:25,992 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:08:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:26,515 INFO L93 Difference]: Finished difference Result 188 states and 231 transitions. [2021-05-06 03:08:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:08:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 03:08:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:26,517 INFO L225 Difference]: With dead ends: 188 [2021-05-06 03:08:26,517 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 03:08:26,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 03:08:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2021-05-06 03:08:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 109 states have (on average 1.201834862385321) internal successors, (131), 116 states have internal predecessors, (131), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:08:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-05-06 03:08:26,533 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 82 [2021-05-06 03:08:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:26,534 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-05-06 03:08:26,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 03:08:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-05-06 03:08:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:08:26,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:26,535 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:26,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:26,758 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1069895175, now seen corresponding path program 2 times [2021-05-06 03:08:26,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:26,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985147296] [2021-05-06 03:08:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:26,763 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:26,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593384435] [2021-05-06 03:08:26,763 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 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 03:08:26,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:08:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:26,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:08:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:08:27,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985147296] [2021-05-06 03:08:27,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:27,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593384435] [2021-05-06 03:08:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593384435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:27,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:27,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:08:27,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209349225] [2021-05-06 03:08:27,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:08:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:08:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:27,007 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:08:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:27,110 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2021-05-06 03:08:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:08:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 03:08:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:27,114 INFO L225 Difference]: With dead ends: 210 [2021-05-06 03:08:27,114 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 03:08:27,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:08:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 03:08:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-06 03:08:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 134 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 03:08:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2021-05-06 03:08:27,128 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 86 [2021-05-06 03:08:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:27,129 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2021-05-06 03:08:27,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 03:08:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2021-05-06 03:08:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:08:27,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:27,130 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:27,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:27,345 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1068167297, now seen corresponding path program 2 times [2021-05-06 03:08:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:27,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039969924] [2021-05-06 03:08:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:27,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:27,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002112220] [2021-05-06 03:08:27,352 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 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 03:08:27,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:08:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:08:27,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 03:08:27,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039969924] [2021-05-06 03:08:27,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002112220] [2021-05-06 03:08:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002112220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:27,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:27,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:08:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230740113] [2021-05-06 03:08:27,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:08:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:08:27,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:08:27,891 INFO L87 Difference]: Start difference. First operand 196 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:08:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:28,474 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2021-05-06 03:08:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:08:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 03:08:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:28,476 INFO L225 Difference]: With dead ends: 221 [2021-05-06 03:08:28,476 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 03:08:28,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:08:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 03:08:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 03:08:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 133 states have internal predecessors, (146), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 03:08:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-05-06 03:08:28,488 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 86 [2021-05-06 03:08:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:28,490 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-05-06 03:08:28,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:08:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-05-06 03:08:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 03:08:28,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:28,491 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:28,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 03:08:28,705 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 114996177, now seen corresponding path program 3 times [2021-05-06 03:08:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:28,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290572217] [2021-05-06 03:08:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:28,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:28,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973631518] [2021-05-06 03:08:28,712 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 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 03:08:28,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 03:08:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:28,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:08:28,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:28,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:28,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 03:08:29,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290572217] [2021-05-06 03:08:29,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973631518] [2021-05-06 03:08:29,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973631518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:29,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:29,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:08:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793701215] [2021-05-06 03:08:29,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:08:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:08:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:08:29,066 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:08:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:29,176 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2021-05-06 03:08:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:08:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 03:08:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:29,178 INFO L225 Difference]: With dead ends: 249 [2021-05-06 03:08:29,178 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 03:08:29,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:08:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 03:08:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 03:08:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 128 states have (on average 1.15625) internal successors, (148), 135 states have internal predecessors, (148), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 03:08:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2021-05-06 03:08:29,197 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 97 [2021-05-06 03:08:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:29,197 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2021-05-06 03:08:29,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 03:08:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2021-05-06 03:08:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:08:29,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:29,199 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:29,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:29,413 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash -545719131, now seen corresponding path program 3 times [2021-05-06 03:08:29,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:29,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784157950] [2021-05-06 03:08:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:29,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:29,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351923233] [2021-05-06 03:08:29,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:08:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 03:08:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:29,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:30,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:30,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:30,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 03:08:30,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784157950] [2021-05-06 03:08:30,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351923233] [2021-05-06 03:08:30,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351923233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:30,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:30,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 03:08:30,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742824569] [2021-05-06 03:08:30,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 03:08:30,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:30,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 03:08:30,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:08:30,084 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:08:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:30,972 INFO L93 Difference]: Finished difference Result 209 states and 241 transitions. [2021-05-06 03:08:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:08:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:08:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:30,974 INFO L225 Difference]: With dead ends: 209 [2021-05-06 03:08:30,974 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 03:08:30,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 03:08:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 03:08:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-05-06 03:08:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 122 states have (on average 1.139344262295082) internal successors, (139), 128 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 03:08:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2021-05-06 03:08:30,986 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 100 [2021-05-06 03:08:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:30,987 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2021-05-06 03:08:30,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:08:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2021-05-06 03:08:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 03:08:30,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:30,988 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:31,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 03:08:31,201 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2021-05-06 03:08:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:31,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610714721] [2021-05-06 03:08:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:31,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:31,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528342543] [2021-05-06 03:08:31,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:08:32,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 03:08:32,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:32,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:08:32,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610714721] [2021-05-06 03:08:32,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528342543] [2021-05-06 03:08:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528342543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:32,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:32,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:08:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396022482] [2021-05-06 03:08:32,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:08:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:08:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:08:32,713 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:08:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:33,090 INFO L93 Difference]: Finished difference Result 192 states and 219 transitions. [2021-05-06 03:08:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:08:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 03:08:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:33,091 INFO L225 Difference]: With dead ends: 192 [2021-05-06 03:08:33,091 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 03:08:33,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:08:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 03:08:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 03:08:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 105 states have internal predecessors, (116), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:08:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-05-06 03:08:33,098 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 100 [2021-05-06 03:08:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:33,099 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-05-06 03:08:33,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:08:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-05-06 03:08:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 03:08:33,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:33,101 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:33,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 03:08:33,309 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash -392782949, now seen corresponding path program 4 times [2021-05-06 03:08:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:33,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200106566] [2021-05-06 03:08:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:33,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:33,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986617235] [2021-05-06 03:08:33,317 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 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 03:08:33,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:08:33,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:08:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:33,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 350 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 03:08:33,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200106566] [2021-05-06 03:08:33,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:33,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986617235] [2021-05-06 03:08:33,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986617235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:33,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:33,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:08:33,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798164614] [2021-05-06 03:08:33,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:08:33,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:08:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:08:33,620 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 03:08:33,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:33,725 INFO L93 Difference]: Finished difference Result 199 states and 232 transitions. [2021-05-06 03:08:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:08:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 03:08:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:33,727 INFO L225 Difference]: With dead ends: 199 [2021-05-06 03:08:33,727 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 03:08:33,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 03:08:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 03:08:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 126 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:08:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-05-06 03:08:33,746 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 104 [2021-05-06 03:08:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:33,746 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-05-06 03:08:33,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 03:08:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-05-06 03:08:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 03:08:33,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:33,748 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:33,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:33,967 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -391055071, now seen corresponding path program 4 times [2021-05-06 03:08:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:33,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204438773] [2021-05-06 03:08:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:33,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:33,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245917588] [2021-05-06 03:08:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:08:34,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:08:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 03:08:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:34,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 03:08:34,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204438773] [2021-05-06 03:08:34,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245917588] [2021-05-06 03:08:34,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245917588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:34,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:34,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:08:34,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682045796] [2021-05-06 03:08:34,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:08:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:08:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:08:34,469 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 03:08:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:34,749 INFO L93 Difference]: Finished difference Result 246 states and 300 transitions. [2021-05-06 03:08:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 03:08:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 03:08:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:34,751 INFO L225 Difference]: With dead ends: 246 [2021-05-06 03:08:34,751 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 03:08:34,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:08:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 03:08:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 03:08:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:08:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2021-05-06 03:08:34,763 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 104 [2021-05-06 03:08:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:34,764 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2021-05-06 03:08:34,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 03:08:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2021-05-06 03:08:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 03:08:34,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:34,766 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:34,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 03:08:34,986 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash 898486511, now seen corresponding path program 4 times [2021-05-06 03:08:34,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:34,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965932066] [2021-05-06 03:08:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:34,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:34,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17529095] [2021-05-06 03:08:34,993 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 03:08:35,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:08:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:08:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 03:08:35,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965932066] [2021-05-06 03:08:35,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:35,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17529095] [2021-05-06 03:08:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17529095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:35,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:35,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:08:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454324546] [2021-05-06 03:08:35,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:08:35,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:08:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:08:35,259 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:08:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:35,386 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2021-05-06 03:08:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:08:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2021-05-06 03:08:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:35,387 INFO L225 Difference]: With dead ends: 255 [2021-05-06 03:08:35,387 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 03:08:35,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:08:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 03:08:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 03:08:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 137 states have internal predecessors, (153), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 03:08:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-05-06 03:08:35,400 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 115 [2021-05-06 03:08:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:35,401 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-05-06 03:08:35,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:08:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-05-06 03:08:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 03:08:35,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:35,402 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:35,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:35,626 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1562534599, now seen corresponding path program 5 times [2021-05-06 03:08:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:35,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402536448] [2021-05-06 03:08:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:35,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852994270] [2021-05-06 03:08:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:35,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:08:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:08:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:35,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-06 03:08:35,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:35,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402536448] [2021-05-06 03:08:35,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:35,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852994270] [2021-05-06 03:08:35,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852994270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:35,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:35,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:08:35,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626435193] [2021-05-06 03:08:35,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:08:35,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:35,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:08:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:35,997 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:08:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:36,146 INFO L93 Difference]: Finished difference Result 267 states and 309 transitions. [2021-05-06 03:08:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:08:36,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2021-05-06 03:08:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:36,147 INFO L225 Difference]: With dead ends: 267 [2021-05-06 03:08:36,148 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 03:08:36,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:08:36,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 03:08:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-05-06 03:08:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.144578313253012) internal successors, (190), 171 states have internal predecessors, (190), 50 states have call successors, (50), 34 states have call predecessors, (50), 32 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 03:08:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-05-06 03:08:36,161 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 118 [2021-05-06 03:08:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:36,161 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-05-06 03:08:36,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 03:08:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-05-06 03:08:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 03:08:36,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:36,163 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:36,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 03:08:36,386 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:36,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1564262477, now seen corresponding path program 5 times [2021-05-06 03:08:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:36,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322791466] [2021-05-06 03:08:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:36,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:36,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590792461] [2021-05-06 03:08:36,393 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 03:08:36,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:08:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 03:08:36,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:36,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:36,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:37,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:37,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 104 proven. 93 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-06 03:08:37,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322791466] [2021-05-06 03:08:37,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590792461] [2021-05-06 03:08:37,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590792461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:37,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:37,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:08:37,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83216548] [2021-05-06 03:08:37,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:08:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:08:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:08:37,080 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:08:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:37,698 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2021-05-06 03:08:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:08:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2021-05-06 03:08:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:37,700 INFO L225 Difference]: With dead ends: 280 [2021-05-06 03:08:37,700 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 03:08:37,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:08:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 03:08:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-06 03:08:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 180 states have internal predecessors, (201), 52 states have call successors, (52), 35 states have call predecessors, (52), 34 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 03:08:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 303 transitions. [2021-05-06 03:08:37,715 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 303 transitions. Word has length 118 [2021-05-06 03:08:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:37,715 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 303 transitions. [2021-05-06 03:08:37,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:08:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 303 transitions. [2021-05-06 03:08:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 03:08:37,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:37,716 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:37,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 03:08:37,940 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash 152469059, now seen corresponding path program 6 times [2021-05-06 03:08:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51432617] [2021-05-06 03:08:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:37,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90073499] [2021-05-06 03:08:37,946 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 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 03:08:38,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 03:08:38,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:38,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 03:08:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 93 proven. 19 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-06 03:08:39,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:39,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51432617] [2021-05-06 03:08:39,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:39,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90073499] [2021-05-06 03:08:39,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90073499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:39,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:39,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:08:39,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333195936] [2021-05-06 03:08:39,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:08:39,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:39,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:08:39,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:08:39,580 INFO L87 Difference]: Start difference. First operand 262 states and 303 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:08:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:44,143 INFO L93 Difference]: Finished difference Result 287 states and 331 transitions. [2021-05-06 03:08:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:08:44,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2021-05-06 03:08:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:44,145 INFO L225 Difference]: With dead ends: 287 [2021-05-06 03:08:44,145 INFO L226 Difference]: Without dead ends: 285 [2021-05-06 03:08:44,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1334.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:08:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-06 03:08:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 268. [2021-05-06 03:08:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 179 states have (on average 1.1340782122905029) internal successors, (203), 186 states have internal predecessors, (203), 52 states have call successors, (52), 37 states have call predecessors, (52), 36 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 03:08:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2021-05-06 03:08:44,162 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 122 [2021-05-06 03:08:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:44,162 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2021-05-06 03:08:44,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:08:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2021-05-06 03:08:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 03:08:44,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:44,163 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:44,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:44,377 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1003922248, now seen corresponding path program 7 times [2021-05-06 03:08:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:44,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237752046] [2021-05-06 03:08:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:44,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:44,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344696460] [2021-05-06 03:08:44,383 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 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 03:08:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 03:08:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 39 proven. 93 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-06 03:08:44,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237752046] [2021-05-06 03:08:44,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344696460] [2021-05-06 03:08:44,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344696460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:44,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:44,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:08:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469485228] [2021-05-06 03:08:44,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:08:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:08:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:08:44,874 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 03:08:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:45,380 INFO L93 Difference]: Finished difference Result 316 states and 369 transitions. [2021-05-06 03:08:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:08:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2021-05-06 03:08:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:45,382 INFO L225 Difference]: With dead ends: 316 [2021-05-06 03:08:45,382 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 03:08:45,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:08:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 03:08:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 281. [2021-05-06 03:08:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 196 states have internal predecessors, (211), 55 states have call successors, (55), 39 states have call predecessors, (55), 38 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-06 03:08:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-05-06 03:08:45,398 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 123 [2021-05-06 03:08:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:45,399 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-05-06 03:08:45,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-06 03:08:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-05-06 03:08:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:08:45,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:45,400 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:45,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:45,624 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2084819725, now seen corresponding path program 6 times [2021-05-06 03:08:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:45,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570475164] [2021-05-06 03:08:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:45,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:45,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20954300] [2021-05-06 03:08:45,633 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 03:08:46,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 03:08:46,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 03:08:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:46,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 03:08:46,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:46,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570475164] [2021-05-06 03:08:46,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:46,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20954300] [2021-05-06 03:08:46,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20954300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:46,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:46,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:08:46,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762231319] [2021-05-06 03:08:46,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:08:46,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:46,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:08:46,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:08:46,467 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 03:08:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:46,670 INFO L93 Difference]: Finished difference Result 369 states and 422 transitions. [2021-05-06 03:08:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:08:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 132 [2021-05-06 03:08:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:46,673 INFO L225 Difference]: With dead ends: 369 [2021-05-06 03:08:46,673 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 03:08:46,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:08:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 03:08:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 338. [2021-05-06 03:08:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 228 states have (on average 1.1271929824561404) internal successors, (257), 237 states have internal predecessors, (257), 65 states have call successors, (65), 46 states have call predecessors, (65), 44 states have return successors, (61), 54 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 03:08:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 383 transitions. [2021-05-06 03:08:46,692 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 383 transitions. Word has length 132 [2021-05-06 03:08:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 383 transitions. [2021-05-06 03:08:46,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 10 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-06 03:08:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 383 transitions. [2021-05-06 03:08:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:08:46,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:46,693 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:46,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 03:08:46,900 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2083091847, now seen corresponding path program 8 times [2021-05-06 03:08:46,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:46,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113912767] [2021-05-06 03:08:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:46,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:46,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586269425] [2021-05-06 03:08:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:47,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:08:47,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:47,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 03:08:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 94 proven. 101 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 03:08:47,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113912767] [2021-05-06 03:08:47,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586269425] [2021-05-06 03:08:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586269425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:47,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:47,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 03:08:47,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723751616] [2021-05-06 03:08:47,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 03:08:47,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 03:08:47,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 03:08:47,813 INFO L87 Difference]: Start difference. First operand 338 states and 383 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:08:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:48,565 INFO L93 Difference]: Finished difference Result 370 states and 419 transitions. [2021-05-06 03:08:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 03:08:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 03:08:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:48,569 INFO L225 Difference]: With dead ends: 370 [2021-05-06 03:08:48,569 INFO L226 Difference]: Without dead ends: 354 [2021-05-06 03:08:48,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-06 03:08:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-06 03:08:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 344. [2021-05-06 03:08:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 232 states have (on average 1.125) internal successors, (261), 241 states have internal predecessors, (261), 67 states have call successors, (67), 46 states have call predecessors, (67), 44 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 03:08:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 391 transitions. [2021-05-06 03:08:48,589 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 391 transitions. Word has length 132 [2021-05-06 03:08:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:48,590 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 391 transitions. [2021-05-06 03:08:48,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 18 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:08:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 391 transitions. [2021-05-06 03:08:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 03:08:48,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:48,591 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:48,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:08:48,805 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1660390021, now seen corresponding path program 1 times [2021-05-06 03:08:48,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:48,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898388519] [2021-05-06 03:08:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:48,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:48,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883605563] [2021-05-06 03:08:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order 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 03:08:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:08:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 03:08:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 88 proven. 107 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 03:08:49,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:49,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898388519] [2021-05-06 03:08:49,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:49,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883605563] [2021-05-06 03:08:49,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883605563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:49,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:49,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 03:08:49,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416993019] [2021-05-06 03:08:49,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 03:08:49,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 03:08:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:08:49,600 INFO L87 Difference]: Start difference. First operand 344 states and 391 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:08:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:08:50,359 INFO L93 Difference]: Finished difference Result 375 states and 420 transitions. [2021-05-06 03:08:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 03:08:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 132 [2021-05-06 03:08:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:08:50,361 INFO L225 Difference]: With dead ends: 375 [2021-05-06 03:08:50,361 INFO L226 Difference]: Without dead ends: 359 [2021-05-06 03:08:50,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:08:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-06 03:08:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 335. [2021-05-06 03:08:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 226 states have (on average 1.1238938053097345) internal successors, (254), 234 states have internal predecessors, (254), 64 states have call successors, (64), 46 states have call predecessors, (64), 44 states have return successors, (60), 54 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 03:08:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 378 transitions. [2021-05-06 03:08:50,381 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 378 transitions. Word has length 132 [2021-05-06 03:08:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:08:50,382 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 378 transitions. [2021-05-06 03:08:50,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 03:08:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 378 transitions. [2021-05-06 03:08:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 03:08:50,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:08:50,383 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:08:50,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 03:08:50,597 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:08:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:08:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1446617583, now seen corresponding path program 9 times [2021-05-06 03:08:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:08:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823290844] [2021-05-06 03:08:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:08:50,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:08:50,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058694128] [2021-05-06 03:08:50,604 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 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 03:08:50,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:08:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:08:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 03:08:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:08:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:51,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:52,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:52,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:08:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 155 proven. 41 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-05-06 03:08:52,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:08:52,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823290844] [2021-05-06 03:08:52,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:08:52,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058694128] [2021-05-06 03:08:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058694128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:08:52,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:08:52,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:08:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956891362] [2021-05-06 03:08:52,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:08:52,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:08:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:08:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:08:52,192 INFO L87 Difference]: Start difference. First operand 335 states and 378 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:09:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:05,945 INFO L93 Difference]: Finished difference Result 409 states and 474 transitions. [2021-05-06 03:09:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:09:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2021-05-06 03:09:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:05,947 INFO L225 Difference]: With dead ends: 409 [2021-05-06 03:09:05,947 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 03:09:05,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1276.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:09:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 03:09:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 355. [2021-05-06 03:09:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 241 states have (on average 1.1410788381742738) internal successors, (275), 249 states have internal predecessors, (275), 68 states have call successors, (68), 46 states have call predecessors, (68), 45 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-06 03:09:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 408 transitions. [2021-05-06 03:09:05,969 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 408 transitions. Word has length 136 [2021-05-06 03:09:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:05,970 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 408 transitions. [2021-05-06 03:09:05,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:09:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 408 transitions. [2021-05-06 03:09:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 03:09:05,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:05,971 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:06,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 03:09:06,194 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:06,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1869319409, now seen corresponding path program 2 times [2021-05-06 03:09:06,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:06,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595131025] [2021-05-06 03:09:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:06,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:06,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479870601] [2021-05-06 03:09:06,201 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 03:09:06,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:06,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:06,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:09:06,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:06,495 WARN L159 QuantifierPusher]: Ignoring assumption.